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What sugar is found in DNA?
Deoxyribose
What base is unique to RNA?
Uracil
Which mutation produces an extra copy of part of a chromosome?
Duplication
hich enzyme adds nucleotides and proofreads DNA?
DNA Polymerase
What does a codon code for?
One amino acid
Which RNA carries instructions from the nucleus?
mRNA
A point mutation changes how many bases?
One
What sugar is found in RNA?
Ribose
Which RNA brings amino acids to the ribosome?
tRNA
True or False: RNA contains uracil.
True
What base is unique to DNA?
Thymine
Which mutation involves the loss of part of a chromosome?
Deletion
Two answers:
Transcription copies information from ______ to ______.
DNA and RNA
True or False: RNA is always double‑stranded.
False
Which RNA forms the ribosome?
rRNA
Which mutation occurs when part of one chromosome attaches to another?
Translocation
A codon is found on which molecule?
mRNA
Which enzyme unzips DNA by breaking hydrogen bonds?
DNA Helicase
A codon is a group of how many bases?
3
Which mutation reverses the direction of a chromosome segment?
Inversion
What are the four bases found in DNA?
Adenine, Thymine, Cytosine, Guanine
An insertion or deletion adds how many bases?
one or more
Translation turns an mRNA message into a ______.
Protein
Name one environmental factor that can affect gene expression.
Temperature, salinity, or nutrient availability
True or False: RNA contains ribose.
True