DNA and RNA

Daniel Brand
Quiz by , created over 2 years ago

Biology (Nucleotides and Nucleic Acids) Quiz on DNA and RNA, created by Daniel Brand on 02/24/2017.

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Daniel Brand
Created by Daniel Brand over 2 years ago
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Question 1

Question
During which phase of the cell cycle does nuclear DNA replicate?
Answer
  • S phase
  • G1 phase
  • G2 phase
  • Mitosis

Question 2

Question
The first stage of DNA replication is [blank_start]unwinding[blank_end] of DNA, which is aided by the enzyme [blank_start]gyrase[blank_end]. Next, the two strands are [blank_start]unzipped[blank_end], thanks to an enzyme called DNA [blank_start]helicase[blank_end], which breaks the [blank_start]hydrogen[blank_end] bonds holding the bases together. Then, new strands of DNA are synthesised by an enzyme called [blank_start]DNA[blank_end] [blank_start]polymerase[blank_end]. In this stage, free nucleotides are joined to their complementary bases and each other by forming h[blank_start]ydrogen[blank_end] bonds and p[blank_start]hosphodiester[blank_end] bonds. They're added in the [blank_start]5[blank_end]' to [blank_start]3[blank_end]' direction.
Answer
  • unwinding
  • gyrase
  • unzipped
  • helicase
  • hydrogen
  • DNA
  • polymerase
  • ydrogen
  • hosphodiester
  • 5
  • 3

Question 3

Question
DNA replication is said to be s[blank_start]emi[blank_end] c[blank_start]onservative[blank_end].
Answer
  • emi
  • onservative

Question 4

Question
Which of the following statements is true about mutations?
Answer
  • Mutations arise when there's an error when matching complementary bases.
  • Mutations occur when there's an evolutionary need for a new adaptation.
  • Mutations are always harmful to the organism.
  • Mutations can always be seen in the phenotype of the organism.

Question 5

Question
The region of a molecule which is complementary to its substrate is called the [blank_start]active[blank_end] [blank_start]site[blank_end].
Answer
  • active
  • site

Question 6

Question
The sequence of nucleotide bases in DNA dictates the primary structure of proteins.
Answer
  • True
  • False

Question 7

Question
DNA is read three bases at a time, these are called [blank_start]triplets[blank_end]. DNA is found in nearly all living organisms, so it is [blank_start]universal[blank_end]. There are often several ways of coding for one amino acid, so DNA is [blank_start]degenerate[blank_end]. DNA bases are read one after the other, so it is [blank_start]non-overlapping[blank_end].
Answer
  • triplets
  • amino acids
  • mRNA
  • trios
  • universal
  • degenerate
  • non-overlapping
  • unique
  • degenerate
  • overlapping
  • universal
  • stored in nucleosomes
  • non-overlapping
  • degenerate
  • called a codon
  • universal

Question 8

Question
[blank_start]Transcription[blank_end] is the process of RNA being created according to a region of DNA (catalysed by [blank_start]RNA[blank_end] [blank_start]polymerase[blank_end]), whereas [blank_start]translation[blank_end] is the process of joining amino acids together according to the sequence of bases on a strand of RNA.
Answer
  • Transcription
  • RNA
  • polymerase
  • translation

Question 9

Question
RNA is double-stranded.
Answer
  • True
  • False

Question 10

Question
rRNA stands for [blank_start]ribosomal[blank_end] RNA, while tRNA stands for [blank_start]transfer[blank_end] RNA. Both are formed in the [blank_start]nucleus[blank_end] and exit through nuclear [blank_start]pores[blank_end], but rRNA is s[blank_start]tructural[blank_end] and tRNA is f[blank_start]unctional[blank_end].
Answer
  • ribosomal
  • transfer
  • nucleus
  • pores
  • tructural
  • unctional

Question 11

Question
Label this tRNA molecule.
Answer
  • Amino acid attachment site
  • Triplet
  • Amino acid
  • Hydrogen bonds
  • Anti-codon
  • Amino acid attachment site
  • Amino acid
  • Codon

Question 12

Question
Three bases on an mRNA molecule require a specific [blank_start]amino acid[blank_end]. The [blank_start]anticodon[blank_end] on a tRNA molecule is matched to a [blank_start]triplet[blank_end] on an mRNA molecule. Also, tRNA molecules with a specific [blank_start]anticodon[blank_end] will have a specific [blank_start]amino acid attachment site[blank_end], and therefore binds a specific [blank_start]amino acid[blank_end].
Answer
  • amino acid
  • metabolism
  • transcription
  • translation
  • anticodon
  • triplet
  • amino acid binding site
  • loop
  • triplet
  • amino acid binding site
  • tRNA molecule
  • base
  • anticodon
  • transcription
  • translation
  • arrangement
  • amino acid attachment site
  • triplet
  • codon
  • hydrogen bonding arrangement
  • amino acid
  • mRNA molecule
  • ribosome
  • 80s ribosome sub-segment

Question 13

Question
The role of chaperone proteins is to...
Answer
  • Aid in folding polypeptides
  • Aid in transcription in the nucleus
  • Degrade mRNA after translation
  • Modulate membrane potential