Enzymatic reactions convert products into substrates
a. True
b. False
Indicate whether the statement is true or false
False
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Comparisons of human and mouse genomes reveals
A. they have widely different numbers of genes, and share only a few more genes than humans and pufferfish. B. the differences between humans and mice are mainly the introns. C. they have very little in common. D. the genomes are very similar, with most of the genes unique to mice linked to size and shape. E. the genomes are very similar, with most of the genes unique to mice linked to smell and reproduction.
A person who has just experienced a painful sunburn has a large number of cells undergoing mitosis for the purpose of
A. developing new stem cells that will give rise to new skin cells. B. repairing and replacing the damaged cells, in the healing process of the skin. C. replication of new DNA copies, so that meiosis will further grow new skin cells. D. modifying new cells that will have different specialties than the original damaged cells. E. asexual reproduction, to produce new skin buds that will fold over and cover the burn.
Which of the following is one of the two main
functions of the nuclear envelope? a. provides residence for ribosomes b. allows separation of DNA from cytoplasm machinery c. provides total isolation of nuclear components d. enables faster cell division e. enables larger cell size
The source of a plant's new cells is a type of plant tissue called its
A. tracheid. B. meristem. C. guard cell. D. cortex. E. mesophyll.