8. Please give answers with detailed explanations. preferentially done by hand o

Question

8. Please give answers with detailed explanations. preferentially done by hand or on computer. Need ASAP and will rate ASAP. 7. A couple of Bio1A students decide to repeat the Meselson and Stahl experiment, but carried the experiment out in the medium with manner. They first grew the bacteria in "'N (light N), then transferred the bacteria to a N (heavy N) and allowed 1 round of replication. They then transferred the bacteria back to "N (light N) for the ight N) for the second round of replication. DNA was extracted after the 1 centrifuged in a density gradient and the 2hd replication and Which of these pairs of tubes correctly represents what they would have seen in their centrifugation tubes after 1 and 2 rounds of replication? The same amount of DNA was loaded in each tube. all N14 N14/15- all N15 . rounds 1 2 8. A cell in which a mutation has disabled Drosha would not be able to produce A. pri-miRNA B. siRNA C. miRNA D. A and C only E. B and C only 9. Which of the following would have been encoded by a gene transcribed by RNA polymerase 1? A Argonaute B. ubiquitin C. peptidyl transferase D. histones E. an enhancer 10 Which of the following, if any, is NOT a post-translational modification carried out on newly synthesized proteins? A. splicing out introns B. glycosylation C. addition of cofactors D. phosphorylation E. all of the above are post-translational modifications 11. The purified genome of a negative-strand RNA virus that infects duck intestinal cells is constructed with the purified capsid proteins of a single-strand DNA virus that infects gopher lung cells. The resulting hybrid virus will introduce its genome into which will produce turn infect which will in A gopher lung cells; negative-strand RNA viruses; duck intestinal cells B. gopher lung cells, negative-strand RNA viruses; gopher lung cells C. gopher lung cells; no viruses at all D. duck intestinal cells; no viruses at all. E. gopher lung cells, single-strand DNA viruses; gopher lung cells Page 3 of 16

Explanation / Answer

the allele present are ;

C - curved hair ,dominant

C+ -recessive ,straight hair

H -spiraled hair - dominant

h -recessive of spiraled

a/a+ -lack of hair { seen at third locus }

1. phenotype of the female mosquito ;

the phenotype of the female will be curved hair which is a dominant allele ,located at the first locus of the gene .

2. Genotype of the male parent ;

c+/c+ ; h/h ; a/a+ ,

c+ represent the straight hair which is a recessive allele ,a no hair , h ,recessive spiraled hair

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