Assessment 4

Which part of the mRNA is recognized by the small ribosomal subunit during initiation of translation?

5’ cap

Which part of the template DNA strand do transcription factors bind to initiate translation?

Promoter region

Which component of a processed mature mRNA prevents degradation of the 3' end?

Poly A tail

Which component of mRNA is complementary to the anti-codon of tRNA?

Codon

This level of DNA packaging involves wrapping of the DNA double helix around a core of histone proteins.

Nucleosomes

This level of DNA packaging is visible during metaphase of Mitosis.

Chromosomes

The amino acid sequence of a protein represents which structural level?

Primary

Alpha-helices and beta-pleated sheets represent which structural level of proteins?

Secondary

What is the non-covalent bond of DNA and RNA molecules?

Hydrogen Bonds

What is the covalent bond of DNA and RNA molecules?

Phosphodiester Bonds

Which of the following nucleotides are purines?

Adenine and Guanine

What is the process of combining different exons of the same gene to produce unique proteins?

Alternative Splicing

Which type of RNA functions to deliver amino acids to the ribosome during translation?

tRNA

Which type of RNA is translated to a sequence of amino acids at the ribosome?

mRNA

Which of the following are differences between DNA and RNA?

All of the above

What are the covalent bonds of proteins formed during translation?

Peptide Bonds

Which of the following statements is/are true?

DNA replication of the LAGGING strand is discontinuous; Okazaki fragments synthesized from the LAGGING strand are ligated together.

What is the enzyme at the P site of the ribosome that catalyzes the peptide bond?

Peptidyl transferase

What is the enzyme that separates the two strands of the DNA molecule during DNA replication?

Helicase

What is the enzyme that joins Okazaki fragments on the lagging strand during DNA replication?

Ligase

What is the mRNA sequence transcribed from the following template DNA sequence? 3’ TAC GGG ATG ACG 5’

5’ - AUG CCC UAC UGC - 3’

Which of the following are necessary to initiate expression of a gene?

Binding of transcription factors to the promoter region.