As the human body grows to trillions of cells, DNA replication occurs about how many times?
A) one billion.
B) three trillion.
C) 100 trillion.
D) 100 quadrillion.
D) 100 quadrillion.
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Oxidative phosphorylation is the process by which ____
a. high energy NADH is made to supply the cell with its needed energy b. a final electron acceptor is used indirectly to facilitate the production of ATP c. ATP is made using high energy intermediates of cellular respiration d. specific enzymes are regulated to control cellular respiration e. NAD+ is regenerated to allow glycolysis to continue
Which of the following is a hormone produced by specialized cells in the heart in response to high
blood pressure?
a. atrial natriuretic factor b. renin c. aldosterone d. antidiuretic hormone e. angiotensin
Which of the following plant hormones prevents plant tissues from senescing, or aging?
A. ethylene B. cytokinin C. gibberellin D. abscisic acid E. auxin
What can you conclude from this figure?
A) Nematodes have more genes that mustard plants. B) The size of the genome is negatively correlated with the number of genes. C) Mammals tend to have the largest genomes. D) Animals have the largest numbers of genes. 