Which of the following is false about animal mitochondria?
a. Mitochondrial genes are transcribed in the mitochondria.
b. There are many copies of mtDNA in a cell.
c. Mitochondrial mRNAs are translated in the mitochondria.
d. Mitochondria have their own ribosomes.
e. Most mitochondrial proteins are coded by mitochondrial genes.
Ans: e
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In the identification of mycobacterial isolates, the niacin test involves the:
a. accumulation of niacin in the medium in which the organism is growing. b. metabolism of niacin to nicotinic acid by enzymatic action. c. testing of the isolate for susceptibility to niacin. d. utilization of niacin in metabolic pathways to produce nicotinic acid.
Earthworms have a(n) ____
a. exoskeleton b. endoskeleton c. hydrostatic skeleton d. segmental skeleton e. squishy skeleton
Compared to when the Na+ channel is closed, how will the transport of Waste molecules change when the Na+ channel is open? The rate of Waste transport out of the cell will:
a) Increase b) Decrease c) Not change
A relationship that has been established based on a large amount of observational and experimental data is a(n)
A) fact. B) assumption. C) conjecture. D) theory.