In analyzing microarray data if the ratio of mRNA present before and after a particular treatment is 1 it indicates that
A. there was no change in mRNA levels before and after treatment
B. the gene was not expressed either before or after treatment.
C. gene expression could not be detected.
D. mRNA was not detected before treatment.
A
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The production of second messengers in signal transduction offers at least two advantages, speed and
A. specificity. B. amplification. C. one-to-one stochiometry. D. reversibility. E. affinity.
The Arctic tern makes an annual migration of up to ____
a. 700,000 km b. 70,000 km c. 7,000 km d. 700 km e. 70 km
Receptor-mediated endocytosis brings in specific material by engulfing it in vesicles. What factors, either directly or indirectly, are related to this process? Choose all that apply.A) It is a passive process.B) It helps to increase membrane fluidity by helping to transport cholesterol into the cell.C) It is an active process.D) It uses carrier proteins.E) A clathrin coat is present.
What will be an ideal response?
Medications which block viral entry into cells include (adhesin/analog/attachment) antagonists
What will be an ideal response?