Which of the following statements is TRUE?
a. Each new cell receives half of the number
of chromosomes in the original cell.
b. Each new cell receives copies of all the
original chromosomes.
c. If the original number of chromosomes was
46, each new cell will have 23.
d. The sister chromosomes are not identical
due to breakages in the DNA.
e. All chromosomes are duplicated except the
sex chromosomes.
B
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A Gram-positive bacterium is characterized by the
a. presence of a thin cell wall. b. presence of a thick cell wall. c. absence of a cell wall. d. presence of an outer membrane. e. absence of ribosomes.
Nearly all ecosystems receive a constant input of energy from which outside source?
a. bacteria b. biomass c. nutrients d. plants e. the sun
Apurinic sites (AP sites) involve a spontaneous loss of a(n)________ in an intact double-helix DNA molecule
Fill in the blank(s) with correct word
The cell that produces interferon is protected from the infectious agent.
Indicate whether the statement is true or false.