Which of the following plant hormones is used to prolong the life of flower cuttings and stored vegetables?

A. auxins
B. IAA
C. cytokinins
D. ethylene


Answer: C

Biology & Microbiology

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Defects in cell signaling can lead to a cancerous cell due to:

A. overproduction of signals that trigger cell division. B. overproduction of a receptor that triggers cell division. C. a defective receptor that stays in the activated state and triggers cell division continuously. D. a defective signal-transduction protein that stays in the activated state and triggers cell division continuously. E. All of these choices are correct.

Biology & Microbiology

The transfer of antibiotic-resistant genes from genetically engineered bacteria to disease-causing bacteria _____.

a. would, if it occurred, be no cause for concern b. has occurred c. is likely to occur d. can never occur e. seems unlikely

Biology & Microbiology

Canine phosphofructokinase (PFK) deficiency afflicts Springer spaniels, affecting an estimated 10% of the breed. Given its critical role in glycolysis, one implication of the genetic defect resulting in PFK deficiency in dogs is _____

A) early embryonic mortality B) elevated blood-glucose levels in the dog's blood C) an intolerance for exercise D) a reduced life span

Biology & Microbiology

Glucose and fructose

a. can be ring forms. b. are structurally different. c. are monosaccharides. d. have the same atoms in the same ratio. e. all of these

Biology & Microbiology