Why is it so important that all of the chromosomes align on the metaphase plate during metaphase?
A. This is the only place in the cell where the cyclins and Cdks are located.
B. If they cannot, it suggests that they aren't properly attached to the spindle microtubules, and thus won't separate properly during anaphase.
C. This is the location where the chromosomes can become attached to the spindle microtubules.
D. This allows asters to form.
E. This allows sister chromatids to form.
B. If they cannot, it suggests that they aren't properly attached to the spindle microtubules, and thus won't separate properly during anaphase.
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Which mutations can interfere with the proper insertion of a protein in the plasma membrane?
A. A polar amino acid to a non-polar amino acid within a transmembrane domain B. A non-polar amino acid to a polar amino acid within a transmembrane domain C. A polar amino acid to a non-polar amino acid within a cytoplasmic domain D. A non-polar amino acid to a polar amino acid within a cytoplasmic domain Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about the amino acids found in a transmembrane domain? What other information is related to the question? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
A free nucleotide has a five carbon sugar
(deoxyribose), __________ phosphate groups, and one of four nitrogen-containing bases. Fill in the blank(s) with the appropriate word(s).
Which one of the following happens during repolarization of a neuron?
A) Sodium channels close, and potassium rushes out of the cell to temporarily reestablish the membrane potential. B) Potassium channels close, preventing further loss of positive ions. C) The sodium-potassium pump is turned off. D) Sodium channels open to allow sodium ions to rush back out of the cell. E) The membrane potential is eliminated.
The hematocrit is a measuure of the percentage of whole blood occupied by
a) WBC b) platelets c) RBCs d) plasma e) plasma proteins