According to the animation, ribosomes move along the mRNA in which direction?
a. 5' to 3'
b. 3' to 5'
c. Either 5' to 3' or 3' to 5'
Answer: a. 5' to 3'
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In phloem, bulk flow occurs from regions of high to low ________ concentration.
A. solute B. mineral C. water D. cytosol E. cytoplasm
In all but the simplest animals, osmoregulation and excretion is carried out using tubules that are ____
a. specialized blood vessels b. part of the lining of the digestive tract c. modifications of the respiratory and digestive systems d. associated with the surface of the skin e. formed from transport epithelium
What is the difference between a strict anaerobe and a facultative anaerobe?
What will be an ideal response?
The 20 different amino acids found in polypeptides exhibit different chemical and physical properties because of different
A) amino groups. B) side chains (R groups). C) tertiary structure. D) carboxyl groups. E) Both A and B are correct.