The cortical reaction functions directly in the
A) formation of a fertilization envelope.
B) production of a fast block to polyspermy.
C) release of hydrolytic enzymes from the sperm cell.
D) generation of a nerve-like impulse by the egg cell.
E) fusion of egg and sperm nuclei.
Answer: A) formation of a fertilization envelope.
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A patient with a blood pressure of 120/75, a pulse rate of 70 beats/minute, a stroke volume of 70 mL/beat (milliliters per beat), and a respiratory rate of 25 breaths/minute will have a cardiac output of _____
A) 70 mL/minute B) 1,000 mL/minute C) 1,750 mL/minute D) 2,800 mL/minute E) 4,900 mL/minute
Transcriptomics is a common approach to infer which metabolic pathways are actively functioning, but which regulation process can MOST significantly complicate or even abolish conclusions from this approach?
A) activity of a catabolite repressor protein on multiple pathways B) antisense RNA silencing C) feedback inhibition with allosteric proteins D) presence of corepressors and inducers which are molecules undetected by transcriptomics
The eukaryotic cell organelle that most resembles a bacterial cell is the ________.
A. ribosome B. mitochondrion C. nucleus D. lysosome E. Golgi apparatus
What might happen if you changed one nucleotide in a codon?
A. The protein would stop being made. B. The protein would have the wrong amino acid sequence. C. There would be no effect on the protein. D. All of the above are possible.