Molecular genetics questions.

An antibiotic interferes with the ability of the ribosome to move. What effect would exposure to this chemical have on a bacterial cell?

1. Protein synthesis will be affected
2. The protein synthesized will be shorter than normal
3. The protein synthesized will be longer than normal
4. No proteins will be produced
5. All of the above

The translation process in eukaryotes requires all of the following, except

1. ribosomes
2. RNA polymerase
3. aminoacyl-tRNA synthetase enzymes
4. ribose sugar
5. B and D

Amino acids have on average a molecular weight of 110 daltons. An open reading frame of 90 bases might encode a protein of

1. 3.3 kDa
2. 33000 Da
3. 33 kDa
4. 330 daltons
5. 99 kDa

When RNA is being made, the RNA base__always pairs with the base __ in DNA.

1. A….U
2. C....G
3. U….A
4. T…..A
5. B and C

How many nucleotides are needed to code for a protein with 45 amino acids  if it includes equivalent of stop codon on mRNA?

1. at least 135
2. at least 1,353
3. at least 450
4. at least 138
5. at least 1,350

The codons AAA,CCC,GGG and UUU specify the amino acids lysine, proline,glycine, and phenylalanine, respectively. Which of the following DNA sequences would specify the peptide Gly-Pro-Phe-Lys if present in the coding strand?

1. 5`-CCCGGGAAATTT-3`
2. 3`-CCCGGGAAAUUU-5`
3. 3`-GGGCCCTTTAAA-3`
4. 5`-GGGCCCUUUAAA-3`
5. 5`-GGGCCCTTTAAA-3`

In tRNA, __ anticodon(s) corresponds to __ amino acid(s)

1. 1,1
2. 3,1
3. 2,2
4. 1,20
5. A and C

Imagine that a codon in the template strand of a gene has the sequence TAC. What sequence of the anticodon would decode this codon?

1. ATG
2. AUG
3. TAC
4. UAC
5. None of the above

Reported that DNA is a major component of the nucleus.

1. Alfred Harshey
2. Friedrich Meischer
3. Paul Berg
4. Maclyn MaCathy
5. Severo Ochoa

What sequence on the coding strand of DNA corresponds to the first amino acid inserted into a protein?

1. TAC
2. UAA
3. UAG
4. AUG
5. ATG