The chemical bond connecting one nucleotide with the next along one strand of a DNA molecule is called a
A. phosphate bond.
B. phosphodiester bond.
C. hydrogen bond.
D. glycosidic bond.
E. peptide bond.
Answer: B
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If a diploid organism has a genome consisting of 4 chromosomes, it can produce ____ different combinations of chromosomes (disregarding crossing over)
a. 4 b. 8 c. 12 d. 16 e. 64
In an experimental procedure, the researcher measures changes, such as cell growth rates, numbers of patients with a disease, etc. in response to factors manipulated at the beginning of the experiment. This measure of change in response to the initial conditions is the
A. dependent variable. B. standardized variable. C. independent variable. D. control group. E. Both dependent variable and standardized variable are correct.
Which of the following is false about dynamic instability of a microtubule end?
A) During a growth phase, assembly of GTP-tubulin is faster than incorporated GTP is hydrolyzed, forming a GTP-cap. B) During a catastrophe phase, hydrolysis of incorporated GTP is faster than GTP-tubulin addition, forming a GDP-cap. C) During rescue, GTP-tubulin assembles fast enough to reestablish a GTP cap. D) Each end of a microtubule can undergo dynamic instability independently. E) A, B, C, and D are true.
During exocytosis, the phospholipids present in the vesicle membrane will end up in the plasma membrane.
Answer the following statement true (T) or false (F)