Plant cells release hydrogen ions and oxygen
from H2O molecules in
a. photosystem I.
b. photosystem II.
c. cyclic photophosphorylation.
d. the light independent reaction.
e. carbon fixation
B
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Fermentation of organic compounds, such as acetate, produces NADH and ATP
Indicate whether the statement is true or false.
What is one of the very important differences between mitosis and meiosis?
a. Chromosomes align midway between spindle poles only in meiosis. b. Homologous chromosomes pair up and exchange genetic material only in meiosis. c. DNA is replicated only in mitosis. d. Sister chromatids separate only in meiosis. e. Interphase occurs only in mitosis.
Evaporation from the leaves of a tree will pull water up through the roots as an unbroken column throughout the entire height of the tree. This feat is possible because of which characteristic of water?
A) surface tension B) cohesion C) absorption D) kinetic energy E) vaporization
Which of the following is true of a retrovirus but not of the Alu retrotransposon?
(a) It requires cellular enzymes to make copies. (b) It can be inserted into the genome. (c) It can be excised and moved to a new location in the genome. (d) It encodes its own reverse transcriptase.