Lab Quiz #2 on Central Dogma of Molecular Biology

Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?

• The pyrimidines would be separated from the deoxyribose sugars.

• All bases would be separated from the deoxyribose sugars.

• The phosphodiester linkages of the polynucleotide backbone would be broken.

• The two strands of the double helix would separate.

Which parts of the amino acids X and Y are involved in the formation of a peptide bond? X-Y

• carboxyl group of X and amino group of Y

• carboxyl group of X and side chain of Y

• side chains of both X and Y

• amino group of X and carboxyl group of Y

When nucleotides polymerize to form a nucleic acid, ________.

• a covalent bond forms between the sugar of one nucleotide and the phosphate of a second

• covalent bonds form between the bases of two nucleotides

• a hydrogen bond forms between the sugar of one nucleotide and the phosphate of a second

• hydrogen bonds form between the bases of two nucleotides

You disrupt all hydrogen bonds in a protein. What level of structure will be preserved?

• secondary structure

• quaternary structure

• tertiary structure

• primary structure

One of the primary functions of RNA molecules is to ________.

• make a copy of itself, thus ensuring genetic continuity

• act as a pattern or blueprint to form DNA

• function in the synthesis of proteins

• transmit genetic information to offspring

What is the order of the central dogma of molecular biology?

• RNA -> DNA -> Protein

• DNA -> Protein -> RNA

• DNA -> RNA -> Protein

• Protein -> RNA -> DNA

What are the 4 parts of the amino acid?

• amide group, hydrogen, COOH, R side-chain

• amino group, OH, COOH, R side-chain

• amino group, hydrogen, COOH, R side-chain

• amino group, hydrogen, COH, R side-chain

What does tRNA stand for?

• transcriptional RNA

• transfer RNA

• translational RNA

• tracrRNA

Given the DNA sequence 5'-AGCCTA-3', which of the following represents the complementary strand of DNA?

• 5'-ATCCGA-3'

• 5'-TAGGCT-3'

• 5'-AGCCTA-3'

• 5'-TCGGAT-3'

What makes RNA different from DNA?

• All answers are correct

• RNA has a 2' hydroxyl group; DNA has a 2' hydrogen group

• RNA is single-stranded; DNA is double stranded

• RNA has uracil; DNA has thymine