Which of the following can be treated post-infection with a vaccine?
a. polio
b. HIV
c. Ebola
d. herpes
c. Ebola
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The CRISPR system
A) facilitates homologous recombination through a complex system of proteins and clustered repeats. B) recognizes foreign DNA sequences that have previously entered the cell and directs the Cas proteins to destroy them. C) repairs DNA and increases DNA damage tolerance during times of stress. D) synthesizes gene transfer agents during stationary phase.
Individuals with three or more copies of each of their chromosomes are called ____
a. polyploids b. haploids c. aneuploids d. euploids e. diploids
Which substance builds up abnormally in Alzheimer's disease?
a. glycogen b. fat c. amyloid protein d. glycolipids e. aminoglycosides
Which of the following best describes the ploidy level of the cells found in the embryo sac after fertilization?
A. There are haploid, diploid, and triploid cells. B. All cells are polyploid. C. All cells are triploid. D. All cells are diploid. E. The ploidy level varies among species.