Name: ________________________ Class: ___________________ Date: __________ ID: A

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Chapter 1-2 Review Assignment

Multiple Choice

Identify the choice that best completes the statement or answers the question.

Corn seedlings

A student wanted to design an investigation to see if auxin, a plant growth hormone, would affect the

germination and growth of corn seedlings. He obtained corn seeds of the same species and placed them in

pots with the same amount of soil. Each pot was given the same amount of water and exposed to the same

amount of light each day for 20 days.

____ 1. Use the information above to answer the next question.

Which of the following descriptions outlines what should be in the experimental design?

I Formulate a hypothesis:

Corn seedlings grow faster when sprayed with a solution of auxin.

II Determine the sample size:

Two corn seeds will be enough for the experiment, one for each type of treatment.

III Explain the treatment for the experimental group and treatment for the control

group:

The experimental group would be sprayed with a solution of auxin, while the control

group would be sprayed with water.

a. I and II only

b. I and III only

c. II and III only

d. I, II and III

____ 2. Use the information above to answer the next question.

The student’s hypothesis for this investigation was: Corn seedlings sprayed with auxin will not grow as tall

as the corn seedlings sprayed with water.

Which of the following results would support this hypothesis?

a. There was no growth in the corn seedlings that were sprayed with auxin or water.

b. Both the corn seedlings sprayed with auxin and water were the same height after 20 days.

c. Corn seedlings sprayed with water grew taller than corn seedlings sprayed with auxin

after 20 days.

d. Corn seedlings sprayed with auxin grew taller than corn seedlings sprayed with water

after 20 days.

Name: ________________________ ID: A

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Vitamin C Cough Drops

A student believed that by taking vitamin C cough drops, this would make a cold go away faster. He

conducted an investigation using students at his school to test out his hypothesis.

____ 3. Use the information above to answer the next question.

Which of the following describes what the control and experimental groups should look like in this

investigation?

a. Experimental group: give vitamin C cough drops to 50 students with a cold.

Control group: give candy to 50 students with a cold.

b. Experimental group: give candy to 50 students with a cold.

Control group: give vitamin C cough drops to 50 students without a cold.

c. Experimental group: give vitamin C cough drops to 50 students without a cold.

Control group: give vitamin C cough drops to 50 students with a cold.

d. Experimental group: give vitamin C cough drops to 50 students with a cold.

Control group: give vitamin C cough drops to 50 students without a cold.

____ 4. Use the information above to answer the next question.

What data should be collected during this investigation?

a. the severity of the cold

b. the gender of the student who has the cold

c. the number of days it took to get over the cold

d. the amount of time a person coughs while having the cold

____ 5. Use the information above to answer the next question.

Which of the following factors should be kept the same in the experimental and control groups in this

investigation?

I the age of the students

II the number students in each group

III the number of vitamin C cough drops and candy given to each group

a. I and II

b. I and III

c. II and III

d. I, II, and III

____ 6. Which of the following descriptions are functions of glucose?

I acts as a source of energy

II speeds up cellular respiration

III is a building block of starch, cellulose, and glycogen

a. I and II only

b. I and III only

c. II and III only

d. I, II, and III

Name: ________________________ ID: A

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____ 7. How are DNA and mRNA similar?

a. They have uracil.

b. They have a ribose sugar.

c. They are polymers of nucleotides.

d. They are double stranded molecules.

____ 8. What type of bonds are responsible for the tertiary structure of a polypeptide chain?

I peptide bonds

II covalent bonds

III hydrogen bonds

a. I and II only

b. I and III only

c. II and III only

d. I, II, and III

____ 9. Which of the following descriptions are functions of water?

I to act as a solution

II to serve as a lubricant

III to regulate temperature

a. I and II only

b. I and III only

c. II and III only

d. I, II, and III

____ 10. Which of the following molecules provides padding for organs in the body?

a. lipids

b. proteins

c. nucleic acids

d. carbohydrates

____ 11. Which of the following characteristics apply to saturated fatty acids?

a. four fused rings of carbon

b. a polar head and a nonpolar tail

c. double bonds between the carbon atoms

d. only single bonds between the carbon atoms

____ 12. Which of the following molecules is required for the hydrolysis of polymers into monomers?

a. water

b. phospholipids

c. nucleotides

d. carbohydrates

Name: ________________________ ID: A

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____ 13. Use the diagram above to answer the next question.

What is bond X?

a. an ionic bond

b. a peptide bond

c. a covalent bond

d. a hydrogen bond

____ 14. Which of the following descriptions explains why water is a polar molecule?

a. Electrons are transferred from the hydrogen atoms to the oxygen atom.

b. The oxygen has a slight positive charge, while the hydrogen has a slight negative charge.

c. The electrons are equally shared between the hydrogen and the oxygen in the water

molecule.

d. The electrons are unequally shared between the hydrogen and the oxygen in the water

molecule.

____ 15. Use the diagram above to answer the next question.

What cellular process produces this molecule?

a. replication

b. photosynthesis

c. protein synthesis

d. cellular respiration

____ 16. Use the diagram above to answer the next question.

What other biological molecule contains structure A?

a. DNA

b. steroid

c. triglyceride

d. phospholipid

Name: ________________________ ID: A

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____ 17. Use the diagram above to answer the next question.

What is this molecule?

a. a dipeptide

b. a disaccharide

c. a polysaccharide

d. a monosaccharide

____ 18. Use the diagram above to answer the next question.

Which of the following descriptions is a function of this molecule?

a. provides structural support in cell walls

b. provides immediate energy for animals

c. provides structural support in cell membranes

d. provides long-term energy storage for animals

____ 19. Use the diagram above to answer the next question.

Identify this molecule.

a. starch

b. cellulose

c. glycogen

d. polypeptide

____ 20. Use the diagram above to answer the next question.

The hydrolysis of this molecule would produce which of the following molecules?

a. steroid

b. glucose

c. nucleotide

d. amino acid

Name: ________________________ ID: A

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____ 21. Which of the following descriptions refers to a substance that keeps the pH constant even when a small

amount of acid is added to a solution?

a. a salt

b. a base

c. an acid

d. a buffer

____ 22. Which of the following properties allows water to dissociate ionic salts?

a. its polarity

b. its molecular size

c. its neutral charge

d. its covalent bonding

____ 23. Use the diagram above to answer the next question.

A molecule consisting of 20 of these monomers would produce

a. a steroid.

b. a nucleic acid.

c. a fatty acid chain.

d. a polypeptide chain.

____ 24. Use the diagram above to answer the next question.

Which of the following is a function of a polymer that is formed from this monomer?

a. provides insulation

b. carries genetic information

c. provides structural support in cell walls

d. act as chemical messengers in the body

Name: ________________________ ID: A

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____ 25. Use the diagram above to answer the next question.

The molecule shown is a component of

a. a steroid.

b. a nucleotide.

c. a phospholipid.

d. a carbohydrate.

____ 26. Which of the following events would occur if the pH of blood dropped below 7.4?

a. Buffers would add more hydrogen ions to the blood.

b. Buffers in the body would take up excess hydrogen ions.

c. Buffers in the body would take up excess hydroxide ions.

d. Buffers in the body would produce more acids in the body.

____ 27. Use the diagram above to answer the next question.

If the monomer shown underwent several dehydration reactions (dehydration synthesis), which of the

following molecules would form?

a. starch

b. triglyceride

c. progesterone

d. deoxyribonucleic acid

Name: ________________________ ID: A

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____ 28. Which of the following molecules are polymers made up of monosaccharides?

I starch

II cellulose

III glycogen

a. I and II only

b. I and III only

c. II and III only

d. I, I and III

____ 29. Use the diagram above to answer the next question.

The hydrolysis of this molecule will require how many water molecules?

a. 1

b. 2

c. 3

d. 4

____ 30. Use the diagram above to answer the next question.

What does Y represent?

a. hydrolysis

b. dissociation

c. peptide bond formation

d. dehydration reaction (dehydration synthesis)

Name: ________________________ ID: A

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____ 31. Which of the following sequences places the molecules in order of least side branches to most side branches?

a. cellulose → glycogen → starch

b. cellulose → starch → glycogen

c. starch → cellulose → glycogen

d. glycogen → cellulose → starch

____ 32. Use the diagram above to answer the next question.

What accounts for this level of protein organization?

a. covalent bonds between the R-groups

b. peptide bonds between adjacent amino acids

c. hydrogen bonds between two different amino acids

d. ionic bonds between more than one polypeptide chain

____ 33. Which of the following accounts for the difference in unsaturated fats and saturated fats?

a. Unsaturated fats have a phosphate group, while saturated fats do not.

b. Saturated fats can form bonds with glycerol, while unsaturated fats cannot.

c. Saturated fats have double bonds, while unsaturated fats have only single bonds between

the carbon atoms.

d. Unsaturated fats have double bonds, while saturated fats have only single bonds between

the carbon atoms.

Name: ________________________ ID: A

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____ 34. Use the diagram above to answer the next question.

Which of the following descriptions applies to the molecule shown?

I found in the cell membrane

II has a polar head and nonpolar tails

III is the structural component of cell membranes

a. I and II only

b. I and III only

c. II and III only

d. I, II, and III

____ 35. Use the diagram above to answer the next question.

Identify the molecule.

a. a steroid

b. a glycerol

c. a triglyceride

d. a saturated fatty acid

Name: ________________________ ID: A

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____ 36. Use the diagram above to answer the next question.

What is the arrow pointing to in the diagram?

a. an ionic bond

b. a peptide bond

c. a covalent bond

d. a hydrogen bond

____ 37. Use the diagram above to answer the next question.

What bond would hold these two molecules together?

a. ionic bond

b. peptide bond

c. disulfide bond

d. hydrogen bond

Name: ________________________ ID: A

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____ 38. Use the diagram above to answer the next question.

What is a function of this molecule?

a. to store long-term energy

b. to store genetic information

c. to catalyze chemical reactions

d. to provide structural support to ligaments

____ 39. Use the diagram above to answer the next question.

What is the complementary base pairing shown?

a. adenine and thymine

b. guanine and adenine

c. cytosine and guanine

d. thymine and cytosine

Name: ________________________ ID: A

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____ 40. Use the above diagram to answer the next question.

What two nitrogenous bases are shown?

a. uracil and cytosine

b. guanine and adenine

c. adenine and thymine

d. cytosine and guanine