What is the nucleosome core particle composed of?
a. histones H2A, H2B, H3, and H4
b. single-stranded binding proteins
c. histones H1 and H2A
d. histones H3 and H4
Ans: a. histones H2A, H2B, H3, and H4
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Which of the following is NOT true of human
chromosomes? a. The haploid number is 23. b. The diploid number is 46. c. There are 23 pairs of chromosomes. d. Human gametes end up with two of each type of 23 chromosomes. e. Human gametes end up with one of each type of 23 chromosomes.
Which of the below are a weakness of conduction cross-sectional studies?
a. unable to establish sequence of events b. infeasible for studying rare conditions c. potentially influenced by response bias d. all of the above
True or False: Microbiomes are found only within the body of a host, which may be animal, plant, fungal, or even protist.
Answer the following statement true (T) or false (F)
Which structure allows green sulfur bacteria to grow using light energy under conditions of very low light?
a. thylakoids b. chloroplast c. chlorosome d. phycobilisomes