Question
A gene is defines as a: A) protein that speed up cellular reaction B) RNA that is used to make protein C) Piece of DNA producing a RNA or protein D) Human chromosome E) Plasmid Which of the following statements concerning the eukaryotic chromosome is false? A) It is composed of DNA and protein. B) The nucleosome is the most basic structural subunit. C) The number of genes on each chromosome is different in different cell types. D) If consists of a single linear molecule of double-stranded DNA. E) Active transcription occurs on euchromatin. Acetylation of histones takes place on the following amino acid residues: A) Cytosine B) Alanine C) Glycine D) Lysine E) None of the above If a cell were unable to produce histone proteins, which of the following would be expected to occur? A) There would be an increase in the amount of "satellite" DNA produced during centrifugation. B) The cells DNA couldnt be packed into ns nucleus. C) Spindle fibers would not form during prophase. D) Amplification of other genes would compensate for the lack of histones. E) Pseudogenes would be transcribed to compensate for the decreased protein in the cell. Muscle cells and nerve cells in one species of animal owe their differences in structure to A) having different genes. B) having different chromosomes. C) using different genetic codes. D) differential gene expression. E) having unique ribosomes. In both eukaryotes and prokaryotes, gene expression is primarily regulated at the level of A) transcription. B) translation. C) mRNA stability. D) mRNA splicing. E) protein stability. Eukaryotic gene expression can be regulated at?
Explanation / Answer
3.
Acetylation of histone take place on (D) Lysine amino acid residue.
4.
lf a cell were unable to produce histone protein - (B) Cell's DNA could'nt be packed into its nucleus.
5. difference in structure of muscle cells and nerve cells in one species of animal - (D) Having differential gene
expression.
6.
ln both prokaryotes and eukaryotes, gene expression is primarily regulated at the level of (A) Transcription
