Which of the following base pairs represents a purine?
b. Adeni ena Adenime
Adenine and Thymine
C.
Guanine and Cytosine
d. Cytosine and Uracil
e. Adenine and Guanine
2. Anaerobic respiration is more efficient than aerobic respiration at breaking down the energy in glucose into the form of ATP.
a. True
b. False
3. Where are excess hydrogen ions removed from the body?
a. In the lungs after reaction with bicarbonate ions b.
In the lungs during a reaction with aldosterone
C.
In the nephron during a reaction with aldosterone
d. In the distal tubules after a reaction with urea
e. In the distal tubules after a reaction with glucose
4. Which of the following mutations would be expected to have the most harmful effect on the resulting protein?
a. A base substitution
b. A base deletion near the start codon
c. A base deletion near the stop codon
d. A three-base addition near the stop codon
5. The integration of simple responses to certain stimuli, such as the patellar reflex, is accomplished by which of the following?
a. The medulla
b. The hypothalamus c.
The spinal cord
d.
The corpus callosum
e. The cerebellum
6. The pain felt in muscles after strenuous exercise is caused by:
a. alcohol build-up
b. phosphocreatine
c. oxidative phosphorylation
d. lactic acid
e. dephosphorylation of ATP in muscle fibres
7. Which of the following is a density-dependent factor that limits population growth of an organism?
a. A disease passing through a population of pigs on a farm
b. A wildfire that rages through a forest, burning it to the ground
c. A factory with a large smokestack nearby reduces air quality
d. Monsoon season wipes away 20% of the population of sparrows
1 answer