What happens to nucleosomes during DNA replication?
What will be an ideal response?
Ans: The histones associated with nucleosomes dissociate from the DNA in the vicinity of the replication fork during DNA replication and quickly reform following replication. The histones remain in the forms of the H32-H42 tetramer and the H2A-H2B dimer during their dissociation.
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________ are small peptide molecules (10—50 amino acids in length) that affect membrane permeability.
Fill in the blank(s) with the appropriate word(s).
In eukaryotes the DNA molecule that makes up a chromosome is typically ____ and usually has ____
replication origin.
a. circular; one b. circular; more than one c. linear; more than one d. linear; one e. linear; no
A long established population that has had no new individuals entering the population would be
considered to be in: a. genetic stasis. b. genetic equilibrium. c. population stability. d. allelic disequilibrium e. allele balance.
Which of the following statements about pseudogenes is false?
(a) Pseudogenes code for microRNAs. (b) Pseudogenes share significant nucleotide similarity with functional genes. (c) Pseudogenes are no longer expressed in the cell. (d) There are estimated to be approximately 20,000 pseudogenes in the human genome.