Most monoploid individuals do not survive because
A) they do not have the appropriate gene dosages.
B) their cells cannot divide properly.
C) recessive lethal mutations cannot be masked by dominant alleles.
D) they have missing genes.
E) they have only one sex chromosome.
C
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The cyclic carbon fixation reactions are also known as the
A. Krebs cycle. B. Calvin cycle. C. citric acid cycle. D. tri carboxylic acid cycle.
Which element is NOT characteristic of the primary structure of proteins?
a. carbon b. hydrogen c. phosphorus d. sulfur e. nitrogen
Molybdenum has an atomic number of 42. Several common isotopes exist, with mass numbers from 92-100. Which of the following can be true?
A) Molybdenum atoms can have between 50 and 58 neutrons. B) Molybdenum atoms can have between 50 and 58 protons. C) Molybdenum atoms can have between 50 and 58 electrons. D) Isotopes of molybdenum have different numbers of electrons.
In the photosystem I reaction center of green plants, light energy captured by pigment molecules is passed to a special reaction center chlorophyll a called
A. P680. B. P870. C. P700. D. chlorophyll II. E. chlorophyll I.