Many apoenzymes are inactive by themselves and must be activated by
a) cofactors and/or coenzymes.
b) ATP.
c) holoenzymes.
d) substrates.
Ans: a) cofactors and/or coenzymes.
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Explain how gel electrophoresis is used to separate dna fragments of different lengths
What will be ideal response?
During the Cambrian,
a. animals started a great adaptive radiation. b. all major groups of animals originated in the seas. c. changes in land masses, climate, and sea level contributed to animal evolution. d. coevolution of predators and prey and of parasites and hosts was a factor in evolution. e. all of these occurred.
The stage of prophase I in which mammalian oogenesis can arrest for years is
A) leptotene. B) zygotene. C) pachytene. D) diplotene. E) diakinesis.
Chromosomes are usually studied and photographed while they are in anaphase of mitosis
a. True b. False