For the molecule that is impermeable, is diffusive equilibrium possible?
a. Yes
b. No
b
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The organelle that best enables an athlete's tissues to be metabolically active are
A. ribosomes. B. lysosomes. C. smooth endoplasmic reticulum. D. mitochondria. E. contractile vacuoles.
Relative to the NAD+ molecule in the illustration, how many hydrogens does the NADH molecule possess?
a. one fewer
b. two more
c. one more
d. two fewer
A three-base sequence, found on the bottom loop of tRNA, that is complementary to a sequence of three bases in mRNA is a(n)
A. terminator. B. amino acid attachment site. C. promoter. D. codon. E. anticodon.
Which of the following statements concerning the causative agent of syphilis is TRUE?
A) It is a large helically coiled bacterium motile by means of endoflagella. B) It is an intracellular parasite. C) It is a non-motile comma-shaped bacterium. D) It is a large bacillus with peritrichous flagella. E) It is pleomorphic and motile by means of gliding motility.