AP BIO REVIEW QUIZ #1
1.
Which of the following does not support the RNA world hypothesis, which states that RNA functioned as
the first genetic material in early protobionts?
a. Many of the most critical elements of cells are composed mostly or entirely of RNA.
b. RNA has been demonstrated to act as a catalyst in modern cells.
c. Modern cells use an RNA template when synthesizing proteins.
d. In modern cells, RNA provides the template on which DNA nucleotides are assembled.
2.
When a strand of DNA is unfolded, the bases on one side read as follows:
5’ – TCAG – 3’
What will the complimentary strand read?
a. 5’ – AGUC – 3’
b. 5’ – AGTC – 3’
c. 3’ – AGUC – 5’
d. 3’ – AGTC – 5’
3.
Which of the following levels of protein structure is not interrupted during denaturation?
a. Primary
b. Secondary
c. Tertiary
d. Quaternary
4.
Which of the following is not true concerning the differences between RNA and DNA?
a. RNA contains pyrimidines while DNA contains purines.
b. The sugar in DNA contains one less oxygen than the sugar in RNA.
c. DNA forms a double helix while RNA is able to fold in on itself.
d. RNA is thought to have evolved before DNA.
5.
a.
Which of the following physiological responses is an example of positive feedback?
The body’s production of red blood cells, which transport oxygen from the lungs to other organs, is
stimulated by low concentrations of oxygen.
A high concentration of glucose in the blood causes deeper, more rapid breathing, which expels carbon
dioxide.
Pressure of the baby’s head near the opening of the uterus stimulates uterine contractions which cause
greater pressure against the uterine opening.
Heightened body temperature induces sweating which disposes of metabolic heat and cools the body.
b.
c.
d.
6.
There are several methods for molecules to move across the plasma membrane. Which of the following
statements accurately describes active transport?
a. Molecules move against their concentration gradients without the use of energy.
b. Molecules move against their concentration gradients using energy.
c. Molecules move with their concentration gradients without the use of energy.
d. Molecules move with their concentration gradients using energy.
7.
Based on the beaker shown below, which solute(s) will exhibit a net diffusion out of the cell?
a.
b.
Sucrose will exhibit a net diffusion out of the cell due to its much higher concentration.
Glucose and fructose will exhibit a net diffusion out of the cell, because molecules will move from an area
of higher concentration to an area of lower concentration.
Glucose will exhibit a net diffusion out of the cell due to its much lower concentration.
Sucrose and glucose will exhibit a net diffusion out of the cell, because molecules will move from an area
of higher concentration to an area of lower concentration.
c.
d.
8.
a.
b.
c.
d.
Bacterial cells and plants cells are less likely than animal cells to lyse in a hypotonic environment because:
The cells have mechanisms which actively transport water outside the cell.
Bacteria and plant cells have plasma membranes less permeable to water than most animal cells.
These cells increase their rates of photosynthesis in hypotonic environments.
Bacterial cells and plants cells are surrounded by cell walls which provide support to the cell membrane
under high osmotic pressure.
9.
A blood cell (0.9M NaCl) is placed in distilled water. What would most likely occur to the blood cell?
a. The cell would swell and lyse.
b. The cell would remain unchanged.
c. The cell would shrivel.
d. Turgor pressure would increase.
10. Pseudomonas aeruginosa are bacteria that grow within a host without harming it until the population
reaches a certain density. At this point, they release a signal to aggressively replicate. To do so, they
create a layer that completely covers the host’s tissue inside of which they replicate at an exponential
rate, in order to overcome the host’s immune system. What is the name of this layer?
a. Follicle
b. Biofilm
c. Quorum sensing
d. Plasmodesmata