Which three-carbon molecule is produced by glycolysis, and then enters the Krebs cycle after conversion to
a two-carbon molecule?
a. acetyl CoA
b. pyruvate
c. glucose
d. carbon dioxide
e. oxygen
ANSWER: b
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Homologous chromosomes have the same arrangement of genes along their length
A. true B. false
Which of the following most likely accounts for the majority of the recombination events during both DNA repair and meiosis?
A. A nick in only one strand of the DNA B. Double-stranded breaks in DNA C. DNA gap repair synthesis D. Heteroduplex formation
"Glucose sparing" is brought about by
a. epinephrine. b. norepinephrine. c. aldosterone. d. cortisol. e. growth hormone.
Which of the following is the proper order of cells for water and minerals to travel from the soil into the xylem?
A. endodermis, cortex, epidermis, endodermis B. root hair, cortex, endodermis, xylem C. root hair, endodermis, cortex, xylem D. root hair, cortex, epidermis, endodermis E. root hair, cortex, endodermis, phloem, xylem