A cell that responds to an environmental condition by the release of a chemical is an example of which of the following elements of cellular communication?
A. a signaling cell
B. a signaling molecule
C. a receptor molecule
D. a responding cell
E. None of these choices is correct.
A
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Some viruses can be crystallized and their structures analyzed. One such virus is yellow mottle virus, which infects beans. This virus has a single-stranded RNA genome containing about 6300 nucleotides. Its capsid is 25-30 nm in diameter and contains 180
If the yellow mottle virus begins its infection of a cell by using its genome as mRNA, which of the following would you expect to be able to measure? A) replication rate B) transcription rate C) translation rate D) accumulation of new ribosomes E) formation of new transcription factors
Do both males and females appear to be affected?
a. Yes b. No
Lakes are highly stratified
What will be an ideal response?
The following is a part of a gene sequence: ATCAGC. What would be the resulting product of transcription?
A) UAGUCG B) CUGCUA C) TAGTCG D) GACGTC