Missed Questions - Ch. 4

Question 1

Enzymes can be denatured (destroyed by)

A) heat and radiation

B) chemicals and extremes of pH

C) electricity

D) all of the above

Answer 1

D) all of the above

Explanation - since enzymes are proteins they can be denatured by factors such as abnormal pH, electricity, chemicals, and heat

Question 2

The final products of glucose oxidation are all of the following except

A) water

B) carbon dioxide

C) energy

D) oxygen

Answer 2

D) oxygen

Question 3

The most important product of the citric acid cycle is…

Answer 3

A) hydrogen

Question 4

Protein is needed primarily to accomplish all of the following except

A) supply energy

B) create new cell parts

C) make enzymes

D) create hormones

Answer 4

A) supply energy

Question 5

The “backbone” of DNA is composed of alternating

Answer 5

C) nucleotides joined so that phosphate and sugar portions alternate

Question 6

Which of the following base pairs of DNA is correct?

A) thymine and cytosine

B) guanine and adenine

C) guanine and thymine

D) adenine and thymine

Answer 6

D) adenine and thymine

Question 7

RNA molecules differ from DNA molecules in all of the following ways except

A) RNA molecules are single rather than double stranded

B) RNA molecules are found in both the nucleus and the cytoplasm

C) there are two forms of RNA

D) RNA molecules contain thymine and uracil

Answer 7

D) RNA molecules contain thymine and uracil

Question 8

DNA molecules are replicated during what phase of the cell cycle?

Answer 8

Interphase

Question 9

Enzymes are specialized proteins that control each of the interrelated reactions of metabolism. T or F?

Answer 9

True

Question 10

A protein is a chain of less than 50 amino acids. T or F?

Answer 10

False

Question 11

Anaerobic respiration requires oxygen. T or F?

Answer 11

False

Anaerobic means without oxygen

Question 12

The end product of carbohydrate digestion is glycogen. T or F?

Answer 12

False

Question 13

Ketone bodies are a product of glucose metabolism

Answer 13

False

Question 14

A by-product of dehydration synthesis is

A)	carbon dioxide

B)	oxygen

C)	water

D)	amino acids

Answer 14

C) water

Question 15

The first stage of cellular respiration is ___________ and occurs in the __________________ .

A)	aerobic, cytosol

B)	anaerobic, Golgi apparatus

C)	aerobic, cell membrane

D)	anaerobic, cytosol

Answer 15

D) Anaerobic cytosol

Question 16

The second phase of cellular respiration is __________ and occurs in the ____________.

A)	aerobic, mitochondria

B)	aerobic, cytosol

C)	anaerobic, Golgi apparatus

D)	anaerobic, cell membrane

Answer 16

A) Aerobic mitochondria

Question 17

The average human diet should consist largely of

A)	protein

B)	carbohydrates

C)	saturated fats

D)	unsaturated fats

Answer 17

B) carbohydrates

Question 18

Genetic information must tell cells

A)	what elements to combine in synthesizing protein

B)	the kinds of bonds between elements that must be formed

C)	how to position amino acids correctly in polypeptide chains

D)	the position of phosphate and sugar molecules in the DNA "backbone"

Answer 18

C) how to position amino acids correctly in polypeptide chains