The primary structure in a protein
A. refers to the helical folding of a protein.
B. refers to two or more polypeptides linked to one another.
C. refers to the sequence of amino acids.
D. refers to the initial folding of a protein.
C
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A proto-oncogene ____
a. always becomes cancerous b. causes cancer c. encodes tumor-suppressing proteins d. repairs DNA e. regulates cell division
There is a population of frogs living in a pond, 25 are green, 25 are brown, 25 are yellow with green spots and 25 are all yellow. A drought occurred and 75% of the frogs died. The remaining frogs were green and brown, after 25 generations the frogs still were green and brown, yellow frogs never appeared in the population again. Which of the following best explains this phenomenon?
A. Sexual selection. B. Balancing selection. C. Bottleneck effect. D. Heterozygote advantage. E. Founder effect.
Suppose that an infectious agent, such as a virus or bacterium, had surface antigens identical to those displayed on the
surface of human cells. Would the immune system be able to detect and destroy these agents? Why or why not? What will be an ideal response?
What is the life history adaptation called where organisms produce offspring several times over many seasons?
A. Iteroparity B. Alloparity C. Polyparity D. Biparity E. Semelparity