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QUIZ 4.
Biol 1406
Name ___________________________________
1. Nucleotides in one strand of DNA are connected to
the ones in the other strand by:
a. peptide bonds.
b. hydrogen bonds.
c. phosphodiester bonds.
d. reversible bonding.
e. chance.
2. In a DNA duplex, the base G is always paired with:
a.
guanine.
b.
cytosine.
c.
thymine.
d.
uracil.
e.
deoxyribose.
3.
The enzyme which makes a primer, allowing
replication to begin is called:
a.
primase.
b.
DNA replicase.
c.
reverse transcriptase.
d.
helicase.
e.
DNA litigase.
4.
The enzyme which makes a copy of the
DNA during DNA replication is:
a.
primase.
b.
DNA polymerase
c.
gyrase.
d.
RNA polymerase
e.
helicase.
5. Experiments using mice and bacteria, showing
the process of transformation, were performed by:
a. Watson and Crick
b. Mendel
c. Beadle and Tatum
d. Rosalin Franklin
e. Griffith
6. What happens if a baby has only one X
chromosome, and no Y?
a. Such a major chromosome
deficiency is lethal, so the baby
would be stillborn.
b. This baby would be a female
with Turner syndrome.
c. The baby would be a male
with Turner syndrome.
d. The individual would have
Klinefelter syndrome.
7. What are alleles?
a. specific physical locations of genes
on a chromosome
b. variations of the same gene (i.e.,
similar nucleotide sequences on
homologous chromosomes)
c. homozygotes
d. heterozygotes
8. A single gene capable of influencing multiple
phenotypes within a single organism is said to
be __________.
a. codominant for that gene
b. incompletely dominant for
that gene
c. polygenic for that gene
d. pleiotropic for that gene
9. A plant has a dominant phenotype but
an unknown genotype. The proper
experiment to determine its correct
genotype would be a/an:
a. heterozygotic cross.
b. testcross.
c. homozytic cross.
d. F1 cross.
e. back cross.
10. The Law of Segregation (Mendel) is
best demonstrated using:
a. a monohybrid cross.
b. a dihybrid cross
c. a testcross.
d. a back cross.
e. two recessive varieties of the
gene under study.