Which of the following does NOT apply to the sex chromosomes X and Y?
a. They are included in an organism's karyotype.
b. They look different and carry different genes.
c. They are autosomes.
d. The nonhomologous pair is thought to have evolved from a homologous pair 250 million years ago.
Ans: c. They are autosomes.
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The tertiary structure of a protein is the _____
A) bonding together of several polypeptide chains by weak bonds B) order in which amino acids are joined in a polypeptide chain C) unique three-dimensional shape of the fully folded polypeptide D) organization of a polypeptide chain into an ?-helix or ?-pleated sheet E) overall protein structure resulting from the aggregation of two or more polypeptide subunits
What would happen to protons that reenter the mitochondrial matrix?
a. They are attached to NAD+ and FAD. b. They combine with oxygen to form water. c. They synthesize ATP by substrate-level phosphorylation. d. They help in the production of CO2. e. They regenerate Coenzyme A.
A brown-eyed couple heterozygous for eye color are planning on having two children. What is the probability that
both children will have blue eyes, assuming brown eyes is dominant and blue eyes is recessive? a. 0 b. 1/32 c. 1/16 d. 1/4 e. 1/2
What is the main reason that the oceans play a larger role than land masses in determining the temperature of air masses?
A. The ocean currents move in a circular pattern while land masses are stationary. B. The ocean holds its temperature longer than land masses. C. The ocean is flat while land masses have topographical features to break up air patterns. D. The ocean currents are constantly moving while land masses are stationary.