Molecular Unit #1 Quiz Questions

In a DNA molecule, one end has a free hydroxyl group, and one end has a free:

Phosphate group

Synthesis of RNA guided by a DNA template is:

Transcription

In transcription, what is the starting material, what is the ending material, and what is the major enzyme that catalyzes the process?

DNA; RNA; RNA polymerase

DNA contains deoxyribonucleotide triphosphates joined together by what type of covalent bond?

PhosphodiesterA

Which nitrogenous base is found in RNA but not in DNA?

Uracil

A student observes a molecule carrying genetic instructions from the nucleus to the ribosome. Which type of RNA is being observed?

mRNA

A tRNA carrying the next amino acid enters which ribosomal site first during translation?

A site

Which DNA sequence is complementary to 5'GATTCTCAAAGGACT3'?

3'CTAAGAGTTTCCTGA5'

The term used to describe the arrangement of the individual strands in the double-stranded DNA molecule is:

Antiparallel

A DNA strand contains the sequence A-T-C-G. Which sequence would be found on the complementary strand?

T-A-G-C

Which of the following is an example of testing a normal host sequence?

Paternity Testing

DNA replication requires the presence of:

DNA template

Which advantage of molecular diagnostics helps identify disease-causing organisms present in very small amounts?

High analytical sensitivity

RNA and DNA are structurally similar because they both:

Are polymers of four different nucleotide bases

The purpose of ligase is to:

Paste two ends of DNA together

In a double-stranded DNA molecule, base pairing between strands occurs between:

A purine and pyrimidine

Which scientists are credited with first describing the double-helix structure of DNA?

Watson and Crick

The set of nucleotides in mRNA that encodes for an amino acid is called a:

Codon

Which of the five ribose carbons of the deoxyribonucleotide are involved in the formation of the DNA chain?

3’ and 5’