A diploid individual with two non-identical alleles for a particular gene is said to be
a) homozygous for that gene
b) homozygous for every gene
c) heterozygous for that gene
d) sex-linked dominant
e) heterozygous for every gene
Ans: c) heterozygous for that gene
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Chemiosmotic ATP synthesis (oxidative phosphorylation) occurs in _____
A) all cells, but only in the presence of oxygen B) only eukaryotic cells, in the presence of oxygen C) only in mitochondria, using either oxygen or other electron acceptors D) all respiring cells, both prokaryotic and eukaryotic, using either oxygen or other electron acceptors E) all cells, in the absence of respiration
Food is prevented from entering the trachea by the
A. glottis. B. epiglottis. C. pharynx. D. larynx. E. sphincter muscle.
Which of the following is properly matched?
A. Osteoblasts and bone breakdown B. Osteocytes and initial bone formation C. Osteoclasts and initial bone formation D. Osteoclasts and bone breakdown E. Osteoblasts and cartilage formation
According to the operon model, for the synthesis of an inducible enzyme to occur, the
A) end-product must not be in excess. B) substrate must bind to the enzyme. C) substrate must bind to the repressor. D) repressor must bind to the operator. E) repressor must not be synthesized.