MOLECULAR GENETICS Exam Questions with
Correct Answers
1. adenine correct answers: A nitrogen base occurring in DNA and RNA; pairs normally with thymine.
2. cotyledon correct answers: First leaf or leaves produced from the seed.
3. cytosine correct answers: A nitrogen base found in DNA or RNA; pairs normally with guanine.
4. deoxyribose correct answers: A five-carbon sugar.
5. DNA correct answers: A giant molecule consisting of the sugar deoxyribose, phosphates and
nitrogen bases; contain the coded genetic information.
6. guanine correct answers: A nitrogen base found in DNA and RNA; normally pairs with cytosine.
7. mutation correct answers: A change in the genetic information code.
8. nitrogen base correct answers: One of the three major types of chemicals making up a
nucleotide in DNA; either guanine, cytosine, adenine, or thymine; the sequence of three codes for
an amino acid
9. nucleotide correct answers: The combination of phosphate, sugar, and nitrogen bases in DNA or
RNA; the combination of three nucleotides codes a specific amino acid.
10. one-gene-one-enzyme concept correct answers: The genetic code of the gene is
responsible for the production of a specific enzyme, which regulates the metabolic pathways in the
cell during meiosis; the combination of chromosomes in a gamete is due to chance.
11. RNA correct answers: A nucleic acid similar to DNA using ribose for the sugar and the
nitrogen base uracil in place of thymine.
12. thymine correct answers: A nitrogen base found in DNA; normally pairs with adenine.
13. The nitrogen base pairs in the
DNA molecule are correct answers: adenine and
cytosine and correct answers: thymine
guanine
14. The genetic code is carried by the
molecule in most organisms. correct
answers: DNA
15. Who were the discoverers of DNA? Select all
that apply. Gregor Mendel
James Watson
Francis Crick
1/
6
, Maurice Wilkins
Charles Darwin correct answers: James Watson
Francis Crick
Maurice Wilkins
16. The structure of DNA was
discovered in correct answers: 1953
2/
6
Correct Answers
1. adenine correct answers: A nitrogen base occurring in DNA and RNA; pairs normally with thymine.
2. cotyledon correct answers: First leaf or leaves produced from the seed.
3. cytosine correct answers: A nitrogen base found in DNA or RNA; pairs normally with guanine.
4. deoxyribose correct answers: A five-carbon sugar.
5. DNA correct answers: A giant molecule consisting of the sugar deoxyribose, phosphates and
nitrogen bases; contain the coded genetic information.
6. guanine correct answers: A nitrogen base found in DNA and RNA; normally pairs with cytosine.
7. mutation correct answers: A change in the genetic information code.
8. nitrogen base correct answers: One of the three major types of chemicals making up a
nucleotide in DNA; either guanine, cytosine, adenine, or thymine; the sequence of three codes for
an amino acid
9. nucleotide correct answers: The combination of phosphate, sugar, and nitrogen bases in DNA or
RNA; the combination of three nucleotides codes a specific amino acid.
10. one-gene-one-enzyme concept correct answers: The genetic code of the gene is
responsible for the production of a specific enzyme, which regulates the metabolic pathways in the
cell during meiosis; the combination of chromosomes in a gamete is due to chance.
11. RNA correct answers: A nucleic acid similar to DNA using ribose for the sugar and the
nitrogen base uracil in place of thymine.
12. thymine correct answers: A nitrogen base found in DNA; normally pairs with adenine.
13. The nitrogen base pairs in the
DNA molecule are correct answers: adenine and
cytosine and correct answers: thymine
guanine
14. The genetic code is carried by the
molecule in most organisms. correct
answers: DNA
15. Who were the discoverers of DNA? Select all
that apply. Gregor Mendel
James Watson
Francis Crick
1/
6
, Maurice Wilkins
Charles Darwin correct answers: James Watson
Francis Crick
Maurice Wilkins
16. The structure of DNA was
discovered in correct answers: 1953
2/
6
