The human egg has about 2000 mitochondrial genomes, but somatic cells have a range of hundreds to thousands. Which of the following is most likely to account for the difference?
A) Heteroplastic cells can give rise to homoplastic cells.
B) Large mitochondria in oocytes can divide into many smaller mitochondria, and smaller mitochondria can fuse.
C) Specific tissue types replicate organelle DNA far more frequently than they do nuclear DNA.
D) Mutant mitochondria replicate at different frequencies than do wild type.
E) Haploid organelle genomes can replicate to form diploid or polyploidy genomes.
B
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Nematocysts are used for: a. debilitating prey
b. attaching to solid materials. c. bioluminescence. d. locomotion.
Oxidative (aerobic) respiration transfers electrons to oxygen
What will be an ideal response?
Deamination is a process that removes:a
the amino group from amino acids. b. the amino group from nucleic acids. c. amines from the bloodstream. d. amines from nucleic acids. e. ammonia from blood.
The function of coenzyme A in the citric acid cycle is most like
A) a limousine driver dropping off a couple at the school prom. B) a frog that turns into a prince. C) a kid jumping up and down on a trampoline. D) throwing a baited hook into a lake and catching a fish.