The loss of CD4 T-helper cells leads to the overt consequences of an HIV infection

Indicate whether the statement is true or false.


Answer: TRUE

Biology & Microbiology

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When RNA polymerase catalyzes the addition of a nucleotide to a growing mRNA chain, a byproduct of this reaction is

A. pyrophosphate. B. water. C. orthophosphate. D. phosphate.

Biology & Microbiology

Depurination is a type of mutation where a purine base is lost, but the DNA backbone remains intact. Which of the following are likely to occur as a result of depurination?

A. An incorrect base can be incorporated in the next round of replication. B. A deletion will occur, and there will be an overall loss of a base to the DNA strand. C. Repair enzymes will recognize the error and replace the defective nucleotide. D. All of the above are correct. E. Both a and c are correct.

Biology & Microbiology

Sperm-carrying fluid from the human male is 

A. called semen. B. released on a twenty-eight-day cycle (approximately). C. stored in the urinary bladder. D. described by two of these answers.

Biology & Microbiology

Heart rate, blood pressure, and respiratory rate peak during the

What will be an ideal response?

Biology & Microbiology