Question

1a. During translation termination:

a. a release factor with an anticodon complementary to the stop mRNA codon bonds the A site

b. Ribosomal complex dissociates releasing the mRNA

c. all of the responses are correct.

d. hydrolysis seperates the polypeptide from tRNA.

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1b. Select the one NOT involved in the formation in the formation of a eukaryotic transcription initiation complex.

a. spliceosome

b. all are required

c. RNA polymerase III

d. transcription factors

e. TATA box in a promoter

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1c. A cross of a wild-type red-eye female fruit fly with a violet-eyed male produces all red-eyed offspring. If the gene is X-linked, which of the following should the reciprocal cross (violet-eyed female x red-eyed male) produce? (Assume that the red allele is dominant to the violet allele).

a. red-eyed females and violent-eyed males

b. 3 red-eyed flies to 1 violent-eyed fly

c. all violet-eyed flies

d. all red-eyed flies

e. a 1:1 ratio of red and violent eyes in males and females.

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1d. A chemical is introduction that prevents the construction of the transcription initiation complex. Which of the following gene regulatory processes would be affected?

a. methylation

b. all responses would be affected.

c. eukaryotic RNA polymerase binding to the promoter.

d. DNA replication

e. Eukarytoic and prokaryotic RNA polymerase binding to the promoter.

Need help with no explanation need to compare answers. will upvote, Thanks

Answer 1

1a. All of the responses are correct. Translational termination occurs in response to a stop codon in the ribosomal-A-site. GTP hydrolysis triggers hydrolysis of polypeptidyl-tRNA.

1b. Spliceosome. It is formed after transcription to remove non-functional part of mRNA i.e, intron.

1c. Option A is correct. A reciprocal cross between red eyed male and violet eyed female gives an F1 in which fenales are red eyed and males are violet eyed.

1d. Option E is correct. Prevention of transcription initiation complex construction affect eukaryotic and prokaryotic RNA polymerase binding to the promoter.