Unformatted text preview: | 46.
I | I
I I |_ I 48.
I I I I 50.
I I I Which of the following statements is the most correct? o gin.
Histone H4 binds to DNA regions between successive nucleosomes. D. The DNA' In nucleosomes passes through a tunnel made by the nuclebsome
E. None of the above. For questions 47 and 48, choose from the following selections: 4 Protein targeting to chloroplasts. Protein targeting to mitochondria.
Protein targeting to peroxisomes.
.Protein targeting to nuclei. None of the above. open? The targeting signal is often an‘amino terminal extension ofabout 20 or more amino
acids which are able to form an' amphipathic structure, with positively charged amino
acids'occurring every 3 to 4 residues, and having set or thr‘recidues interspersed '
among hydrophobic amino acids. . g . - The targeting signal' is often a sequence of amino acids such as pro—lys-lys-lys-arg- lys~val, exposed on the surface of the proterm D ‘ Which of the following statenients is the most correct ‘I A. . The signal recognition particle (SRP) is involved in targeting proteins to
mitochondria. B.j The signal recognition particle binds to proteins targeted to peroxisomes. Q The signal recognition particle contains proteins and RNA. D. The signal recognition particle mompanies proteins targeted to the nucleus. E. None of the above. Which of the following statements is the most correct?
The recA protein is a transposon involved In homologous recombination. A. -
B. The recA protein cleaves one of the strands tn double stranded DNA.
Q. The recA protein has an ATP-dependent ligase activity \D\ The recA protein has a binding site for single stranded DNA.
E. None of the above. 159 ...
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- Spring '08