Which of the following sigma factors is essential for general transcription in exponentially growing cells?
A. ?28
B. ?32
C. ?38
D. ?54
E. ?70
E
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Embryonic stem cells are pluripotent. What
does this mean?
a. they can divide an unlimited amount of times b. they can give rise to most, but not all body cell types c. they can give rise to any of the body cell types d. they are indestructible e. they can give rise to different, unique individuals
The structure that transports sperm cells from the epididymis to the urethra is the
A. vas deferens. B. ductus arteriosus. C. semen. D. prostate tubules.
Hyphae form a covering over roots. These hyphae create a large surface area that helps to do which of the following?
A) aid in absorbing minerals and ions B) maintain cell shape C) increase cellular respiration D) anchor a plant
Vinegar can be produced when alcohol in wine is oxidized to acetic acid.
Answer the following statement true (T) or false (F)