Inactive Ras is bound to receptor tyrosine kinases by ____
a. G proteins
b. adapter proteins
c. phosphate bonds
d. peptide tethers
e. GDP
ANSWER: b
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If the protective coverings of the brain were damaged, the ____ would be damaged
a. ventricles b. thalamus c. medulla d. meninges e. reflexes
Which of the following statements is false?
a. Chromosomes do not pair during mitosis. b. Genes and chromosomes are duplicated during prophase. c. Each species has a specific number of chromosomes. d. New nuclei are formed during telophase. e. A diploid cell will produce two diploid daughter cells by mitosis
Which kind of metabolic poison would interfere with the glycolysis stage of cellular respiration?
A) An agent that reacts with FADH2 and oxidizes FAD+ B) An agent that closely mimics the structure of glucose but is not capable of being metabolized and broken down C) An agent that binds to lactate and inactivates it D) An agent that reacts with oxygen and depletes its concentration in the cell E) An agent that inhibits the formation of acetyl CoA
Nearly half of the human genome is composed of a noncoding DNA that can move from one chromosomal location to another. This type of noncoding DNA is/are called
A. introns. B. pseudogenes. C. microRNA genes. D. transposons. E. tandem clusters.