A cis acting factor that place very important role in eukaryotic transcription will be:
1. RNA polymerase II.
2. Transcription factors.
3. Enhancers.
4. Shine Dalgarno sequence

All the following statements regarding a nucleosome are incorrect except:
1. It contains a single large protein which is connected to DNA by smaller linker proteins.
2. It contains approximately 200 base pairs of DNA.
3. It includes histone and nonhistone proteins.
4. It is a 30 nm diameter structure.

The first formed primary structure of a protein molecule represents:
1. Folding of protein due to hydrophobic interactions.
2. Local folding which is stabilized by hydrogen bonds.
3. The sequence of amino acids in the polypeptide.
4. Interactions between two or more polypeptides.

Select the correct ascending order of the levels of packaging of DNA?
1. Nucleosomes, 30 nm fibers, radial loop domains.
2. 30 nm fibers, nucleosomes, radial loop domains.
3. Nucleosomes, radial loop domains, 30 nm fibers.
4. Radial loop domains, nucleosomes, 30 nm fibers.

The enzyme aminoacyl-tRNAsynthetase is able to recognize all the following in the tRNA molecule except:
1. The acceptor stem.
2. Bases in the stem loop regions.
3. The anticodon region.
4. 5’ end.

The 5’ cap in the final transcript in eukaryotic mRNA helps in:
1. Protection from inappropriate splicing.
2. Synthesis of the polyA tail.
3. Transport of mRNAs into the nucleus.
4. Recognition of the 5' end of the transcript by a ribosome.

RNA molecules can have catalytic functions as well. A well known example would be:
1. Polynucleotide kinase.
2. Base pair recognition.
3. Methyl transferase.
4. Peptidyl transferase.

Two amino acids will differ from each other in their properties because they have different:
1. The amino group.
2. The carboxyl group.
3. The R group.
4. Peptide bonds.

Oculocutaneous albinism is a genetic disorder in human characterized by lack of pigmentation of skin. This can be caused by all the following except:
1. Lack of an enzyme that synthesizes the pigment molecules.
2. Lack of a protein that transports the pigment molecules to the appropriate location.
3. Lack of a receptor protein that allows the pigment to be taken up into appropriate cells.
4. Exposer to colder environment for a long period

The use of proflavin in his experiments enabled Francis Crick to determine that the genetic code is a triplet code because:
1. It causes mutations in DNA.
2. It can cause large deletions in DNA.
3. It causes single insertions or deletions in DNA sequences.
4. It can be lethal.