Match the DNA key terms to their correct definition.

Question

Column A
adenine
base pairing
cytosine
guanine
thymine
mutagen
frameshift mutation
point mutation
chromosomal mutation

Column B
a. one of four nitrogenous bases found in DNA and RNA; pairs
with cytosine
b. mutation that shifts the "reading frame" of the genetic
message by inserting or deleting a nucleotide
c. principle that bonds in DNA can form only between adenine
and thymine and between guanine and cytosine
d. gene mutation in which a single base pair in DNA has been
changed
e. one of four nitrogenous bases found in DNA and RNA; pairs
with thymine or uracil|
f. one of four nitrogenous bases found in DNA and RNA; pairs
with guanine
g. nitrogenous base found in DNA but not in RNA
h. a change in number of chromosomes or a large amount of
DNA in an organism
i. chemical or physical agents in the environment that interact
with DNA and may cause a mutation

Answer 1

Here are the matches between the DNA key terms in Column A and their definitions in Column B:

• adenine: e. one of four nitrogenous bases found in DNA and RNA; pairs with thymine or uracil
• base pairing: c. principle that bonds in DNA can form only between adenine and thymine and between guanine and cytosine
• cytosine: f. one of four nitrogenous bases found in DNA and RNA; pairs with guanine
• guanine: a. one of four nitrogenous bases found in DNA and RNA; pairs with cytosine
• thymine: g. nitrogenous base found in DNA but not in RNA
• mutagen: i. chemical or physical agents in the environment that interact with DNA and may cause a mutation
• frameshift mutation: b. mutation that shifts the "reading frame" of the genetic message by inserting or deleting a nucleotide
• point mutation: d. gene mutation in which a single base pair in DNA has been changed
• chromosomal mutation: h. a change in number of chromosomes or a large amount of DNA in an organism