shrihari higher secondary school€¦ · (a) heredity but not protein synthesis. (b) biochemical...

11) Choose correct answer from the given alternatives and write it. [Each carries 1 Mark]

X

2 This is demo ans.

Name the scientist, who has worked on pneumococcus bacteria ?

(A) Neuton (B) Mendel (C) Griffith (D) Watson

Which species of pneumococcus bacteria found poisonous ?

(A) S-I (B) S-II (C) R-II (D) S-III

Which species of pneumococcus bacteria forms rough colonies ?

(A) S-II (B) R-I (C) S-III (D) R-II

In DNA which kind of bond’s found in co-valency ?

(A) Hydrogen bond (B) Peptide bond

(C) Phosphate bond (D) Phosphodiester bond

In DNA [A] + [G] = ............

(A) [T] + [C] (B) [T] – [C] (C) [T] ´ [C] (D) (A) and (C) both

Which ratio is changes with the diversity of organisms ?

(A)A + GT + C

(B)A + TG + C

(C)G + TC + A

(D)G + CA + T

Who is functioned very well as a messenger as well as transporter ?

(A) DNA (B) Nucleotide (C) RNA (D) All of the above

Which scientists has given the double helix structure of DNA ?

(A) Watson, Crick, Wilkinson (B) Ervin

(C) Avery, Macleod (D) Dr. Khorana and Mc Carty

By which enzyme the newly synthesized chain is formed in DNA ?

(A) DNA polymerase (B) Phosphodiesterase

(C) DNA polymerase-III (D) DNA-polymerase-II

When DNA polymerase-III is being activated ?

(A) When short chain of DNA is formed (B) When primer is formed

(C) At the time of lagging strand formed (D) At the time of nucleotides formed

Which enzyme is firstly attached in the initiation of transcription ?

(A) Transcriptase (B) Polymerase (C) Ligase (D) RNA polymerase

The processes of structural gene regulated by operator site is regulated by what ?

(A) Structural protein (B) Repressor protein (C) Promoter (D) Regulatory gene

Which protein is responsible for the switching on and off of operator ?

(A) Repressor protein (B) Regulatory protein (C) Structural protein (D) Promoter

The rate of synthesis of m-RNA is regulated by what ?

(A) Promoter gene (B) Regulatory gene (C) Operator gene (D) Structural gene

The process of translation to synthesize a protein is regulated by which gene ?

(A) Promoter gene (B) Regulatory gene (C) Operator gene (D) Repressor gene

Which genes function for negative regulation ?

(A) Regulatory (B) Repressor gene (C) Promoter (D) Structural gene

By what name the process of determination and collection of the sequence of nucleotides known ?

(A) Database (B) Gene mapping (C) HGP (D) Genomics

How many nucleotide base does a human genome contain ?

(A) 1 > billion (B) 2 > billion (C) 3 > billion (D) 3 > million

By the help of DNA fingerprinting from the blood stains on the cloths of Abraham Lincoln, his

which deficiency was discovered ?

(A) Turner syndrome (B) Kline felter’s syndrome

(C) Marfan’s syndrome (D) Malaria, typhoid

shrihari higher secondary schoolMarks:80 Subject:12th-Bio

Chapter:6,8 12th biochap 6 and 8

Date:14/10/19

Time:3hour

[A] [80]

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Which of the following is used for making a DNA fingerprint ?

(A) The things used by the person (B) Bones

(C) Various chemicals and medicines (D) Blood, semen, hair bulb.

In order to make a DNA fingerprint, which of the following enzyme are used to digest the DNA ?

(A) Maltase, lactase, sucrase (B) Restriction digestion, restriction endonuclease

(C) Peptidase - nucleopeptidase (D) Hexokinase - dehydrogenase

The principal genetic material of living being is .............

(A) RNA (B) DNA (C) Both (A) and (B) (D) None of above

Genetic code means ..........

(A) singlet code (B) doublet code (C) triplet code (D) none of the above

RNA is genetic material in ..........

(A) bacteria (B) plant viruses (C) fungi (D) none of the above

TMV contains a genetic material ..........

(A) DNA (B) RNA (C) DNA and RNA (D) chromosome

Duplication of DNA is called ..........

(A) transduction (B) translation (C) replication (D) chromosome

Gene is a ..........

(A) a segment of DNA (B) one nucleotide (C) DNA and RNA both (D) protein synthesis

In Operon model, regulator gene functions as

(A) repressor (B) regulator (C) Inhibitor (D) all of the above

Transfer of information from DNA to RNA is called ..........

(A) transcription (B) translation (C) transduction (D) migration

Gene controls

(A) heredity but not protein synthesis. (B) biochemical reaction of some enzymes.

(C) protein synthesis and heredity. (D) protein synthesis but not heredity.

Anticodon is associated with

(A) t-RNA (B) r-RNA (C) m-RNA (D) DNA

In cytoplasm after replacement of with what m-RNA attached ?

(A) Cell nucleus (B) Lysosome (C) Ribosome (D) Glycogen

To indicate one Amino acid if two-two nitrogen bases joined, then how many codes are obtain ?

(A) 8 (B) 16 (C) 24 (D) 32

To indicate one amino acid if more than one code is used, then what are the codes called ?

(A) Initiation codon (B) Nonsense codon (C) Degenerate codon (D) Termination codon

Tumor virus contain which as a genetic material ?

(A) DNA (B) RNA (C) Protein (D) Carbohydrate

In cytoplasm, differents amino acids are transported by what ?

(A) Virus (B) Bacteria (C) m-RNA (D) t-RNA

Chain is functioned as a polypeptide, after removal of which group ?

(A) Formyl group (B) Non-formyl group (C) Promoter gene (D) Enzymes

Which place is seen after the promoter ?

(A) Place of sign (B) Initiation place (C) Termination codon (D) Degenerate codon

When was the analysis of the working draft of the genome published ?

(A) February-2000 (B) February-2001 (C) February-2002 (D) February-2003

Which statement is true for HGP (Human Genome Project) ?

(A) To decide the base pairing for synthesizing DNA(B) RNA synthesis and protein synthesis

(C) The study of process of DNA replication (D) All of the above

// Page:2 //

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Join correct column.

(A) (a – Z); (b – Y); (c – W); (d – X) (B) (a – W); (b – Z); (c – X); (d – Y)

(C) (a – Y); (b – Z); (c – X); (d – W) (D) (a – Y); (b – W); (c – Z); (d – X)

Column - I Column - II

(a) Repressor protein (W) Having the codes for protein’s synthesis

(b) Structural gene (X) Controlling the transcription

(c) Promoter gene (Y) Switchin on/off the operator

(d) Operator gene (Z) It’s a segment of DNA

In which diagnostic method, intensive magnetic field is used ?

(A) Western blot (B) ELISA (C) MRI (D) CT scan

Why AIDS occur ?

(A) Destruction of helper T-lymphocytes (B) Destruction of killer T-cells

(C) Auto immunity (D) Decrease in interferon.

Who secretes interferons ?

(A) mitochondria (B) viral cell (C) bacteria (D) protozoa

Which disease does not occur due to smoking ?

(A) malaria (B) lung cancer (C) throat inflammation (D) blisters in stomach

Which substance present in tobacco stimulates adrenal gland ?

(A) codeine (B) morphin (C) nicotine (D) barbiturates

Which is known as the sleeping pill ?

(A) morphine (B) barbiturates (C) codeine (D) cocaine

Which substance is used to relieve stress in stomach and intestine ?

(A) codeine (B) cocain (C) LSD (D) morphin

In CT scan which rays are produced ?

(A) alfa rays (B) beta rays (C) gamma rays (D) X rays

Due to uncontrolled cell division in body which disease occurs ?

(A) AIDS (B) cancer (C) pneumonia (D) malaria

Where was NACO established ?

(A) USA (B) Brazil (C) India (D) Japan

With the help of which enzyme the viral RNA is duplicated in host cell

(A) Transcriptase (B) Reverse polymerase

(C) Polymerase (D) Reverse transcriptase

In which year AIDS was documented first time ?

(A) 1991 (B) 1971 (C) 1981 (D) 1961

In which year AIDS was documented in INDIA ?

(A) 1986 (B) 1981 (C) 1976 (D) 1971

How many peptide strands are there in every antibody molecule ?

(A) 5 (B) 4 (C) 2 (D) 3

Which vaccine is made from yeast by recombination of DNA technology ?

(A) hepatitis B vaccine (B) polio vaccine

(C) triplet vaccine (D) snake venom vaccine

Which protein protects against the viral infection to non infected cells ?

(A) Immunoglobin (B) Interferons (C) Myosine (D) Actin

In which disease blisters occur on the skin, nail and head of the body ?

(A) elephantiasis (B) pneumonia (C) malaria (D) ringworm

What is called the zygote formed due to fertilization of microgamete and megagamete ?

(A) gametocyte (B) haemozine (C) sporozoite (D) ookinate

In which disease liquid accumulates in alveoli and bronchiole tubes ?

(A) Typhoid (B) AIDS (C) Pneumonia (D) Malaria

// Page:3 //

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Whose number increase during allergy ?

(A) IgA (B) IgE (C) IgG (D) IgM

The infectious phase of plasmodium means

(A) Sporozoite (B) Trophozoite (C) Merozoite (D) None

Due to uncontrollable cell division in the body which disease occurs ?

(A) AIDS (B) Cancer (C) Pneumonia (D) Malaria

Match the followings :

(A) (p - i) (q - ii) (r - iii)(s - iv) (B) (p - ii) (q - iii) (r - i) (s - iv)

(C) (p - iii) (q - iv) (r - i) (s - ii) (D) (p - iv) (q - iii) (r - ii) (s - i)


(p) WB test (i) Antigen

Protein Polypetide

(q) MRI method (ii) Associated with

mucous

(r) MALT (iii) Non-ionic rays

(s) r-DNA technology (iv) AIDS

) Cells involved in immune mechanism are ..............

(A) erythrocytes (B) lymphocytes (C) eosinophils (D) thrombocytes

) Where are IgA, IgM and IgE antibodies found ?

(A) Skin (B) blood (C) lymph (D) glands

) S - Filarial worm is ovoviviparous.

R - The kid worms of filaria are known as microfilaria.

(A) S & R are True. (B) S & R are True. R is not the explanation of S.

(C) S is True & R is False. (D) S is False & R is True.

) Culex fatigon is a .............

(A) Worm (B) Virus (C) Mosquito (D) Bacteria

) LSD is prepared from

(A) Lichen (B) Algae (C) Fungus (D) Bacteria

) The unrestraint growth of specific tissues in the body result in non-infectious disease like .......

(A) AIDS (B) Pneumonia (C) Cancer (D) Typhoid

) Match the followings :

(A) (p - i) (q - ii) (r - iii) (s - iv) (B) (p - iii) (q - iv) (r - i) (s - ii)

(C) (p - iv) (q - iii) (r - ii) (s - i) (D) (p - iii) (q - i) (r - ii) (s - iv)


(p) Physical barrier (i) Monocyte

(q) Physiological barrier (ii) Interferons

(r) Cellular barrier (iii) Mucous

membrane

(s) Cytokine barrier (iv) Acid in stomach

) Which parasite secrets digestive enzymes and breaks the haemoglobin ?

(A) Trophozoite (B) Sporozoite (C) Schizont (D) Merozoites

) Into which stage Schizont is converted by asexual reproduction ?

(A) Sporozoite (B) Merozoite (C) Trophozoite (D) Microzoite

) Marijuana is extracted from ...............

(A) Dried leaves and flowers of hemp plant (B) Ergot fungus

(C) Roots of hemp plant (D) Coca plant

// Page:4 //

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) When infected mosquito bites the host human, the larva enter his ............

(A) blood (B) saliva (C) skin (D) muscles

) Which part of opium after losing its medicinal property is used as food ?

(A) Leaves (B) Mature seeds (C) Immature seeds (D) Flowers

) During infection T-cells interact with ...............

(A) Macrophages (B) B-cells (C) Infected cells (D) Erythrocytes

) Which type of disease is caused by Plasmodium falciparum protozoan ?

(A) Pneumonia (B) Jaundice (C) Diarrhoea (D) Malaria

) Match the followings:

(A) (p - i) (q - ii) (r - iii) (s - iv) (t - v) (B) (p - v) (q - iv) (r - ii) (s - ii) (t - i)

(C) (p - v) (q - i) (r - ii) (s - iv) (t - iii) (D) (p - v) (q - ii) (r - iv) (s - i) (t - iii)


(p) Trichophyton (i) Thickening of skin and

epithelial tissue

(q) Filarial worm (ii) Food of chicken guniya

(r) Aedes (iii) Food of parasites

(s) Haemophilus (iv) Burning sensation in

alveolar wall

(t) Globulin (v) Spreading of blisters due

to constant itching

) Which age duration of a person is known as adolescence ?

(A) 12-18 years (B) 12-17 years (C) 18-20 years (D) 12-16 years

// Page:5 //

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KU

MA

R PRA

KA

SHA

N K

END

RA

Kumar Prakashan Kendra Welcome To Future M:91-7359 662200

Answer KeyMarks:80 Subject:12th-Bio


Date:14/10/19

Time:3hour

Section [ A ] : 1 Mark MCQ

No Ans Chap Sec Que PageNo BookType

1 C Chap 6 F-A 1 Kumar

2 D Chap 6 F-A 2 Kumar



5 A Chap 6 F-A 8 Kumar

6 B Chap 6 F-A 9 Kumar



























KU

MA

R PRA

KA

SHA

N K

END

RA


// Page:2 //






































KU

MA

R PRA

KA

SHA

N K

END

RA


// Page:3 //












11) Choose correct answer from the given alternatives and write it. [Each carries 1 Mark]

X

2 This is demo ans.

Name the scientist, who has worked on pneumococcus bacteria ?

(A) Neuton (B) Mendel (C) Griffith (D) Watson

Which species of pneumococcus bacteria found poisonous ?

(A) S-I (B) S-II (C) R-II (D) S-III

Which species of pneumococcus bacteria forms rough colonies ?

(A) S-II (B) R-I (C) S-III (D) R-II

In DNA which kind of bond’s found in co-valency ?

(A) Hydrogen bond (B) Peptide bond

(C) Phosphate bond (D) Phosphodiester bond

In DNA [A] + [G] = ............

(A) [T] + [C] (B) [T] – [C] (C) [T] ´ [C] (D) (A) and (C) both

Which ratio is changes with the diversity of organisms ?

(A)A + GT + C

(B)A + TG + C

(C)G + TC + A

(D)G + CA + T

Who is functioned very well as a messenger as well as transporter ?

(A) DNA (B) Nucleotide (C) RNA (D) All of the above

Which scientists has given the double helix structure of DNA ?

(A) Watson, Crick, Wilkinson (B) Ervin

(C) Avery, Macleod (D) Dr. Khorana and Mc Carty

By which enzyme the newly synthesized chain is formed in DNA ?

(A) DNA polymerase (B) Phosphodiesterase

(C) DNA polymerase-III (D) DNA-polymerase-II

When DNA polymerase-III is being activated ?

(A) When short chain of DNA is formed (B) When primer is formed

(C) At the time of lagging strand formed (D) At the time of nucleotides formed

Which enzyme is firstly attached in the initiation of transcription ?

(A) Transcriptase (B) Polymerase (C) Ligase (D) RNA polymerase

The processes of structural gene regulated by operator site is regulated by what ?

(A) Structural protein (B) Repressor protein (C) Promoter (D) Regulatory gene




Paper SolutionMarks:80 Subject:12th-Bio


Date:14/10/19

Time:3hour

[A] [80]

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

12.

13.



The rate of synthesis of m-RNA is regulated by what ?

(A) Promoter gene (B) Regulatory gene (C) Operator gene (D) Structural gene

The process of translation to synthesize a protein is regulated by which gene ?

(A) Promoter gene (B) Regulatory gene (C) Operator gene (D) Repressor gene

Which genes function for negative regulation ?

(A) Regulatory (B) Repressor gene (C) Promoter (D) Structural gene

By what name the process of determination and collection of the sequence of nucleotides known ?

(A) Database (B) Gene mapping (C) HGP (D) Genomics

How many nucleotide base does a human genome contain ?

(A) 1 > billion (B) 2 > billion (C) 3 > billion (D) 3 > million





Which of the following is used for making a DNA fingerprint ?

(A) The things used by the person (B) Bones

(C) Various chemicals and medicines (D) Blood, semen, hair bulb.

In order to make a DNA fingerprint, which of the following enzyme are used to digest the DNA ?

(A) Maltase, lactase, sucrase (B) Restriction digestion, restriction endonuclease

(C) Peptidase - nucleopeptidase (D) Hexokinase - dehydrogenase

The principal genetic material of living being is .............

(A) RNA (B) DNA (C) Both (A) and (B) (D) None of above

Genetic code means ..........

(A) singlet code (B) doublet code (C) triplet code (D) none of the above

RNA is genetic material in ..........

(A) bacteria (B) plant viruses (C) fungi (D) none of the above

TMV contains a genetic material ..........

(A) DNA (B) RNA (C) DNA and RNA (D) chromosome

Duplication of DNA is called ..........

(A) transduction (B) translation (C) replication (D) chromosome

Gene is a ..........

(A) a segment of DNA (B) one nucleotide (C) DNA and RNA both (D) protein synthesis


// Page:2 //

14.

15.

16.

17.

18.

19.

20.

21.

22.

23.

24.

25.

26.

27.

In Operon model, regulator gene functions as

(A) repressor (B) regulator (C) Inhibitor (D) all of the above

Transfer of information from DNA to RNA is called ..........

(A) transcription (B) translation (C) transduction (D) migration

Gene controls

(A) heredity but not protein synthesis. (B) biochemical reaction of some enzymes.

(C) protein synthesis and heredity. (D) protein synthesis but not heredity.

Anticodon is associated with

(A) t-RNA (B) r-RNA (C) m-RNA (D) DNA

In cytoplasm after replacement of with what m-RNA attached ?

(A) Cell nucleus (B) Lysosome (C) Ribosome (D) Glycogen

To indicate one Amino acid if two-two nitrogen bases joined, then how many codes are obtain ?

(A) 8 (B) 16 (C) 24 (D) 32

To indicate one amino acid if more than one code is used, then what are the codes called ?

(A) Initiation codon (B) Nonsense codon (C) Degenerate codon (D) Termination codon

Tumor virus contain which as a genetic material ?

(A) DNA (B) RNA (C) Protein (D) Carbohydrate

In cytoplasm, differents amino acids are transported by what ?

(A) Virus (B) Bacteria (C) m-RNA (D) t-RNA

Chain is functioned as a polypeptide, after removal of which group ?

(A) Formyl group (B) Non-formyl group (C) Promoter gene (D) Enzymes

Which place is seen after the promoter ?

(A) Place of sign (B) Initiation place (C) Termination codon (D) Degenerate codon

When was the analysis of the working draft of the genome published ?

(A) February-2000 (B) February-2001 (C) February-2002 (D) February-2003

Which statement is true for HGP (Human Genome Project) ?

(A) To decide the base pairing for synthesizing DNA(B) RNA synthesis and protein synthesis

(C) The study of process of DNA replication (D) All of the above










// Page:3 //

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29.

30.

31.

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36.

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In which diagnostic method, intensive magnetic field is used ?

(A) Western blot (B) ELISA (C) MRI (D) CT scan

Why AIDS occur ?

(A) Destruction of helper T-lymphocytes (B) Destruction of killer T-cells

(C) Auto immunity (D) Decrease in interferon.

Who secretes interferons ?

(A) mitochondria (B) viral cell (C) bacteria (D) protozoa

Which disease does not occur due to smoking ?

(A) malaria (B) lung cancer (C) throat inflammation (D) blisters in stomach

Which substance present in tobacco stimulates adrenal gland ?

(A) codeine (B) morphin (C) nicotine (D) barbiturates

Which is known as the sleeping pill ?

(A) morphine (B) barbiturates (C) codeine (D) cocaine

Which substance is used to relieve stress in stomach and intestine ?

(A) codeine (B) cocain (C) LSD (D) morphin

In CT scan which rays are produced ?

(A) alfa rays (B) beta rays (C) gamma rays (D) X rays

Due to uncontrolled cell division in body which disease occurs ?

(A) AIDS (B) cancer (C) pneumonia (D) malaria

Where was NACO established ?

(A) USA (B) Brazil (C) India (D) Japan

With the help of which enzyme the viral RNA is duplicated in host cell

(A) Transcriptase (B) Reverse polymerase

(C) Polymerase (D) Reverse transcriptase

In which year AIDS was documented first time ?

(A) 1991 (B) 1971 (C) 1981 (D) 1961


(A) 1986 (B) 1981 (C) 1976 (D) 1971


// Page:4 //

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43.

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45.

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47.

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49.

50.

51.

52.

53.

54.


(A) 1986 (B) 1981 (C) 1976 (D) 1971

How many peptide strands are there in every antibody molecule ?

(A) 5 (B) 4 (C) 2 (D) 3

Which vaccine is made from yeast by recombination of DNA technology ?

(A) hepatitis B vaccine (B) polio vaccine

(C) triplet vaccine (D) snake venom vaccine

Which protein protects against the viral infection to non infected cells ?

(A) Immunoglobin (B) Interferons (C) Myosine (D) Actin

In which disease blisters occur on the skin, nail and head of the body ?

(A) elephantiasis (B) pneumonia (C) malaria (D) ringworm

What is called the zygote formed due to fertilization of microgamete and megagamete ?

(A) gametocyte (B) haemozine (C) sporozoite (D) ookinate



Whose number increase during allergy ?

(A) IgA (B) IgE (C) IgG (D) IgM

The infectious phase of plasmodium means

(A) Sporozoite (B) Trophozoite (C) Merozoite (D) None

Due to uncontrollable cell division in the body which disease occurs ?

(A) AIDS (B) Cancer (C) Pneumonia (D) Malaria

Match the followings :

(A) (p - i) (q - ii) (r - iii)(s - iv) (B) (p - ii) (q - iii) (r - i) (s - iv)

(C) (p - iii) (q - iv) (r - i) (s - ii) (D) (p - iv) (q - iii) (r - ii) (s - i)


(p) WB test (i) Antigen

Protein Polypetide

(q) MRI method (ii) Associated with

mucous

(r) MALT (iii) Non-ionic rays

(s) r-DNA technology (iv) AIDS

) Cells involved in immune mechanism are ..............

(A) erythrocytes (B) lymphocytes (C) eosinophils (D) thrombocytes

) Where are IgA, IgM and IgE antibodies found ?

(A) Skin (B) blood (C) lymph (D) glands


// Page:5 //

55.

56.

57.

58.

59.

60.

61.

62.

63.

64.

65.

66.

) S - Filarial worm is ovoviviparous.

R - The kid worms of filaria are known as microfilaria.

(A) S & R are True. (B) S & R are True. R is not the explanation of S.

(C) S is True & R is False. (D) S is False & R is True.

) Culex fatigon is a .............

(A) Worm (B) Virus (C) Mosquito (D) Bacteria

) LSD is prepared from

(A) Lichen (B) Algae (C) Fungus (D) Bacteria

) The unrestraint growth of specific tissues in the body result in non-infectious disease like .......

(A) AIDS (B) Pneumonia (C) Cancer (D) Typhoid

) Match the followings :

(A) (p - i) (q - ii) (r - iii) (s - iv) (B) (p - iii) (q - iv) (r - i) (s - ii)

(C) (p - iv) (q - iii) (r - ii) (s - i) (D) (p - iii) (q - i) (r - ii) (s - iv)


(p) Physical barrier (i) Monocyte

(q) Physiological barrier (ii) Interferons

(r) Cellular barrier (iii) Mucous

membrane

(s) Cytokine barrier (iv) Acid in stomach

) Which parasite secrets digestive enzymes and breaks the haemoglobin ?

(A) Trophozoite (B) Sporozoite (C) Schizont (D) Merozoites

) Into which stage Schizont is converted by asexual reproduction ?

(A) Sporozoite (B) Merozoite (C) Trophozoite (D) Microzoite

) Marijuana is extracted from ...............

(A) Dried leaves and flowers of hemp plant (B) Ergot fungus

(C) Roots of hemp plant (D) Coca plant

) When infected mosquito bites the host human, the larva enter his ............

(A) blood (B) saliva (C) skin (D) muscles

) Which part of opium after losing its medicinal property is used as food ?

(A) Leaves (B) Mature seeds (C) Immature seeds (D) Flowers

) During infection T-cells interact with ...............

(A) Macrophages (B) B-cells (C) Infected cells (D) Erythrocytes

) Which type of disease is caused by Plasmodium falciparum protozoan ?

(A) Pneumonia (B) Jaundice (C) Diarrhoea (D) Malaria






epithelial tissue




alveolar wall


to constant itching


// Page:6 //

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68.

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72.

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79.






epithelial tissue




alveolar wall


to constant itching

) Which age duration of a person is known as adolescence ?

(A) 12-18 years (B) 12-17 years (C) 18-20 years (D) 12-16 years


// Page:7 //

80.

shrihari higher secondary school€¦ · (a) heredity but not protein synthesis. (b) biochemical...

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