Which of the following is NOT true about enzymes?
a) They lower the activation energy of chemical reactions.
b) They are consumed by the reactions they catalyze.
c) Each one is specific to the particular substrate(s) to which it binds.
d) They are usually made of amino acids.
Ans: b) They are consumed by the reactions they catalyze.
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Bacteria use restriction enzymes to
a. integrate viral DNA. b. destroy viral DNA. c. prevent mutation of their DNA. d. copy their genes. e. inhibit the expression of some of their genes.
A lichen consists of a(n) ________ and an alga (or, in some cases, a cyanobacterium)
Fill in the blank(s) with correct word
Drosophila eggs acquire an initial asymmetry before fertilization as a result of
A. maternal DNA molecules being deposited in one end of the egg. B. nurse cell migration to one end of the egg. C. production of bicoid proteins in one end of the egg. D. attachments of cadherins to one end of the cell. E. maternal mRNA being deposited in one end of the egg.
The government of Iran is ruled by religious figures and they ensure that citizens adhere to Islamic teachings. Iran is a _______ law system:
a) theocratic b) common c) civil d) traditional