It is possible to synthesize proteins in vitro (in a test tube) without the use of living cells. If starting from a mature mRNA transcript, which of the following components would not be needed to do this?
A) adenine molecules
B) amino acids
C) tRNAs
D) ribosomes
Answer: A
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Some animals have no gills when young, but then develop gills that grow larger as the animal grows larger. What is the reason for this increase in gill size?
A) The young of these animals are much more active than the adult, which leads to a higher BMR (basal metabolic rate) and, therefore, a higher need for oxygen. B) Relative to their volume, the young have more surface area across which they can transport all the oxygen they need. C) The young have a higher basal metabolic rate. D) Relative to their surface area, the young have more body volume in which they can store oxygen for long periods of time.
Is it possible that some of the monsters reported by ancient mariners were giant squid or octopi? Search the Internet before giving and explaining your answer.
What will be an ideal response?
“The extracellular matrix does all of the following EXCEPT”
A. provide an important source of energy for the organism B. provide strength C. contribute to cell signaling D. provide structural support E. helps to organize cells
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.