What is a reason that the proteome is larger than the genome?
A. Alternative splicing
B. Proteins are constantly being synthesized and degraded.
C. Each protein has a specific function which are quite varied while the genes in the genome are only transcribed
D. Each protein has multiple functional domains whille each gene consists of three basic parts.
A
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Which is true of nucleotides?
A. They are the building blocks of DNA. B. They carry chemical energy in their bonds. C. They are part of certain enzymes. D. They serve as specific signaling molecules. E. All of the choices are true.
Companion cells load most of the carbohydrates into sieve tube members
a. through plasmodesmata. b. by osmosis. c. by antiport. d. through carrier proteins. e. by symport.
Explain the two opposing hypotheses that currently exist about the origin of modern humans. What will be an ideal response?
What is the term for the diffusion of water across a semipermeable membrane?
A.) osmosis B.) equilibrium C.) transport D.) isotonic