Vitamins ____ are produced within the human body
a. A and C
b. A and D
c. C and D
d. C and K
e. D and K
ANSWER: e
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In which of the intervals would the addition of an inhibitor of DNA polymerase effect the progression of the cells through the cell cycle?
A. interval 1 B. interval 2 C. interval 3 D. interval 4 E. interval 5
Which of the following is an example of epigenetic inheritance?
A. Expression of the Igf-2 gene based on methylation of the ICR and DMR regions B. Inheritance of flower color as studied by Mendel C. Leaf coloration based on mitochondrial inheritance D. Snail shell twist patterns
Gina comes home to a sink full of dirty dishes and remarks, “Yuck, what a horrible smell!” She then peels an orange
and sighs, “On, that smells much better!” What allows Gina to distinguish between the different smells? a. Na+ channels are activated for pleasant smells; Cl- channels for unpleasant smells. b. The process of sensory adaptation differs from smell to smell. c. The amplitude of an action potential is higher for pleasant smells. d. The combination of activated receptors differs from smell to smell. e. Unpleasant smells activate more receptors than pleasant smells.
The antibody-binding site of an antibody is made up of
A) portions of both of the heavy chains only. B) the variable regions of the heavy chains. C) the light chains only. D) the variable regions of both light and heavy chains. E) one heavy chain.