Scurvy is a deficiency disease related to which of the
following vitamins?
a. A
b. B1 (thiamine)
c. C (ascorbic acid)
d. B2 (riboflavin)
e. niacin
Answer: c
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If the diploid number of chromosomes in mouse somatic cells is 40, how many chromosomes are present during
prophase I?
a. 40, each comprised of a single paternal or maternal chromosome b. 80, each comprised of a pair of homologous chromosomes c. 20, each comprised of a single sister chromatid d. 80, each comprised of a single sister chromatid e. 40, each containing a pair of sister chromatids
A small amount of DNA was located at a crime scene. Which one of the following techniques is most likely to be used to amplify the DNA so it can be identified more accurately?
A) genetic engineering B) use of DNA ligase to recombine the pieces of DNA C) gene therapy D) DNA sequencing E) polymerase chain reaction
How are Cryptosporidium sporozoites able to evade the immune system?
A) They attach to host cells and build a protective membrane from modified host cell membrane materials. B) Special proteins bind and inhibit antibodies from adhering to them. C) They escape from phagocytes. D) They reside inside the host cells. E) They evade phagocytosis by using a capsule.
Which number describes a Confocal Microscope?
What will be an ideal response?