What appears to be a dark side to telomerase activity with regard to human health?
A) Telomerase is active in most cancer cells.
B) Telomerase is inhibited by p53.
C) p53 inhibits telomerase.
D) There are more chromosomal ends than can be repaired by telomerase.
E) Telomerase activity is only seen in somatic cells, therefore, chromosome shortening is likely in gametic chromosomes.
Answer: A
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A patient diagnosed with B. anthracis is allergic to penicillin. Which antibiotic can be given that will be therapeutically effective?
a. Ampicillin b. Ciprofloxacin c. Imipenem d. Vancomycin
NEW: In cats, the gene for coat color is found on the X chromosome. Shown below is a mass of cells making up an early female cat embryo. The X chromosomes are shown in each cell; this embryo has one orange coat color allele (O) and one black coat color allele (B). Which of the following is ACCURATE about this embryo?
A. It will give rise to a calico cat.
B. It will give rise to a black cat, because black is dominant to orange.
C. It will give rise to an orange cat, as the paternal chromosomes carrying the black allele will be inactivated.
D. Since it is heterozygous, it will give rise to a cat with two Barr bodies in each cell.
E. Since it is heterozygous, it will give rise to a calico cat with two Barr bodies in each cell.
The second law of thermodynamics is valid only in a closed system, such as a living organism
Indicate whether the statement is true or false
One of the two strains of Streptococcus pneumoniae isolated in the 1920s was surrounded by a
____________________, giving it the ability to evade the immune system and cause pneumonia. Fill in the blank(s) with the appropriate word(s).