During the mitotic spindle checkpoint, ____
a. cells are in anaphase
b. cells arrest if chromosomes are attached properly to the mitotic spindle
c. cells become irreversibly committed to S phase
d. proper spindle attachment to chromosomes is assessed
e. cells enter G0
ANSWER: d
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As soils dry, root cells at the root tip produce _________, which ____________
A. abscisic acid; stimulates root elongation B. abscisic acid; suppresses root elongation C. ethylene; stimulates root elongation D. ethylene; suppresses root elongation E. auxin; stimulates root elongation
Which statement is true?
a. Translation cannot proceed until eIF-2 is phosphorylated. b. eIF4F bonds to the 40S ribosome after GTP is hydrolyzed. c. Phosphorylation of a protein can alter RNA stability. d. GTP bonds to the 5’ cap of the mRNA during translation.
The smallest cell structure that would most likely be visible with a standard (not super-resolution) research-grade light microscope is a _____
A) mitochondrion B) microtubule C) ribosome D) microfilament
A clone is
A) genetically identical cells derived from a single cell. B) a genetically engineered cell. C) a taxon composed of species. D) a mound of cells on an agar medium. E) None of the answers is correct.