Question

Genetics Helllppppp plllllleeeease.

31. Noting the following template DNA strand: 3'-TACGGTAAGCCTAAAATC-5'

What will the mRNA sequence be that is transcribed from this DNA sequence above?

Select one:

a. 3'-AUGCCAUUCGGAUUUUAG-5'

b. 5'-ATGCCATTCGGATTTTAG-3'

c. 5'-AUGCCAUUCGGAUUUUAG-3'

d. 3'-TACGGTAAGCCTAAAATC-5'

32. _______ first noted an acidic substance in the nuclei of cells from pus.

Select one:

a. Griffith

b. Chargaff

c. Meischer

d. Garrod

33. A retrovirus produces an enzyme, called reverse transcriptase, which copies its RNA genome into DNA. This is opposite the central dogma because:

Select one:

a. a virus is not an organism.

b. a virus lacks genetic material.

c. a retrovirus lacks DNA.

d. the central dogma states that DNA is copied into RNA.

34. The genetic code is:

Select one:

a. triplet, overlapping, and not universal.

b. triplet, non-overlapping, and universal.

c. quaternary, overlapping, and non-universal.

d. doublet, non-overlapping, and with an inconsistent reading frame.

Which statement is correct?

35. Select one:

a. DNA polymerase proofreads DNA, correcting mismatched nucleotides as it copies DNA bases during replication

b. Primase removes short segments of RNA bases and replaces them with DNA

c. Ligase breaks the hydrogen bonds between complementary DNA strands creating breaks in the DNA

d. DNA polymerase unwinds the DNA at replication forks and helps glue breaks in the DNA

Answer 1

31) given DNA sequence is the sequence of the template strand so RNA produced is complementary to this in RNA Thymine is replaced with uracil so the answer is c. 5'-AUGCCAUUCGGAUUUUAG-3'

32) c. Meischer, Friedrich Miescher first identified DNA from the pus sample.

33) according to central dogma, DNA is transcribed to mRNA and mRNA is translated to protein in reverse transcription DNA is produced from RNA so the answer is d. the central dogma states that DNA is copied into RNA.

34) The genetic code consists of 3 nucleotides and the genetic code is universal that is the same genetic code is present in all organisms so the answer is b. triplet, non-overlapping, and universal.

35) a. DNA polymerase proofreads DNA, correcting mismatched nucleotides as it copies DNA bases during replication

ligase catalyzes the formation of phosphodiester bonds, DNA polymerase catalyzes polymerization reaction as well as it has a proofreading activity, primase adds RNA primer so the correct statement is a. DNA polymerase proofreads DNA, correcting mismatched nucleotides as it copies DNA bases during replication