Topic 2 Molecular Biology MPC

Question 1

Chemical elements are part of biochemical molecules in living organisms?

Answer 1

nitrogen, sulfur, phosphorus and iron

Question 2

Which of the following is an organic compound made by all plants?
A. Carbon dioxide
B. DNA
C. Lactose
D. Oxygen

Answer 2

B. DNA

Question 3

Graph showing the relationship between substrate concentration and enzyme activity with a fixed concentration of enzyme?

Answer 3

r shaped

Question 4

Oxygen is produced during photosynthesis. What is the source of this oxygen inside the plant?
A. Air spaces in the leaf
B. Carbon dioxide
C. Glucose
D. Water

Answer 4

D. Water

Question 5

What principle is necessary to prevent mutation of DNA during replication?
A. Base pairing is complementary.
B. One gene codes for one polypeptide.
C. Substrates are specific to enzymes.
D. The genetic code is universal.

Answer 5

A. Base pairing is complementary.

Question 6

What happens during translation?
A. Copying of DNA to produce DNA
B. Copying of DNA to produce mRNA
C. Copying of DNA to produce tRNA
D. Polypeptide synthesis

Answer 6

D. Polypeptide synthesis

Question 7

Equation shows a chemical reaction that occurs during anaerobic cell respiration?

Answer 7

pyruvate –> lactate