Which polymer serves as the information storage molecule for cells?
A) Carbohydrate
B) Nucleic acid
C) Protein
D) Lipids.
Ans: B) Nucleic acid
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Which of the following processes within viral replication is the greatest source of genetic variation in RNA virus populations?
A) High mutation rate due to lack of proofreading of RNA genome replication errors. B) Transcription from the host cell RNA polymerase introduces numerous mutations. C) Capsid proteins from the host cell can replace the viral capsid. D) Viral RNA is translated by host cell ribosomes.
The analysis of energy flow in an aquatic ecosystem in Silver Springs, Florida revealed that ____
a. energy flows are difficult to measure b. most of the sun's energy is harvested c. only a little energy is transferred from one trophic level to the next d. the energy flow in carnivores is equal to that of producers e. trophic energy losses are not significant
An acid
A. has a value above 7 on the pH scale. B. is a chemical that takes hydrogen ions from a solution. C. has a value of 7 on the pH scale. D. is a chemical that adds hydrogen ions to a solution. E. All of the answer choices are correct.
What is the nucleosome core particle composed of?
a. histones H2A, H2B, H3, and H4 b. single-stranded binding proteins c. histones H1 and H2A d. histones H3 and H4