1. What is the Best evidence that genes encode the amino
acid sequence of proteins?
a) proteins are macromolecules
b) The amino acid sequence of
polypeptide is changed by gene mutation
c) DNA serves as a template for RNA
d)mRNA is found in the ribosome
2. Which is not a characteristic of proteins?
a) waxes
b)albumins
c) carotenoids
d)Lecithin
3. The tRNA anticodon for the amino acid valine is CAA(reading 3’
to 5’). What is the mRNA codon for valine (reading 5’ to 3’)
a) TTG
b) GGU
c) CCA
d) UGG
4. The basis for the pairing of the two strand of DNA in the
double helix is
a) covalent
bonding
b) hydrogen bonding
c) hydrophobic
interaction
d) tertiary structure
5. Which of the following statements about the Krebs cycle is not
true?
a) The Krebs cycle is linked to
glycolysis by pyruvate
b) The Krebs cycle produces
nucleotides such as NADH and FADH2
c) Citrate is an intermediate in the
Krebs cycle
d) The Krebs cycle is the single greatest source of ATP in the cell
6. Which of the flowing is a correct association?
a)Polysome: group of Golgi complexes
b)Ribosome: electron transport chain
c)Lysosome: digestive enzyme for intracellular use
d)Mitochondria: transport materials from
the nucleus to the cytoplasm
7. Which of the following statements about viruses is not true?
a)The protein coat of the virus does
not enter a host bacterial cell
b)Their genetic material may be DNA
or DNA
c)The virus may replicate in a bacterial
host
d)The virus may replicate autonomously in the absence of a host
8. Cells that involved in active transport such as
cells of the intestinal epithelium, utilize large quantities of ATP. In such
cells, there are
a)many polyribosomes
b)many mitochondria
c)many lysosomes
d) high level of adenylate cyclise activity
9. Which of the following
statements regarding photosynthesis is not true?
a)The light cycle occurs only during
exposure to light.
b)Red and blue are optimal for photosynthetic
function
c)ATP is produced during the light cycle.
d)The dark cycle occurs only in the absence of light.
10. Which of the following process utilizes proofreading to
increase its accuracy?
a)transcription
b)DNA replication
c)recombination
d)electron transport
Answers
1. b) The amino acid sequence of polypeptide is changed by gene mutation
2. b)albumins
3. b) GGU
4. b) hydrogen bonding
5. d) The Krebs cycle is the single greatest source of ATP in the cell
6. c)Lysosome: digestive enzyme for intracellular use
7. d)The virus may replicate autonomously in the absence of a host
8. b)many mitochondria
9. d)The dark cycle occurs only in the absence of light.
10. b)DNA replication