First Name______________ Last Name_________________ Block____________________
Science 9 DNA Quiz
Part 1: Fill in the blank. Choose the word that best describes the corresponding statement.
Each word can only be used once.
Statements
1._____
This word best describes the shape of a DNA molecule.
2._____
Human cells have this number of chromosomes.
Word Bank
a. 46
a. Continuity
3______ This chemical combines with sugar to form the
backbone of DNA molecules.
4______ The building blocks of DNA.
b. Asexual Reproduction
5._____
d. Thymine
This is the condensed form that DNA usually exists in.
c. Double helix
6______ When a cell is about to divide, DNA is further
condensed into a structure called.
7______ The base Adenine always pairs with.
e. Chromatin
8._____
The chromosome that determines your gender is called.
g. Chromosome
9._____
The place in the cell where DNA is stored.
h. Genes
10.____
This is the specific order of nucleotides, the “code” that
holds the genetic information.
A segment of DNA.
i.
DNA sequence
j.
Nucleotides
The form of reproduction in which the offspring are
genetically identical to their parents.
This term describes a species ability to exist over time
k. Phosphate
11.____
12.____
13.____
f.
l.
Nucleus
Sex Chromosome
Part two: Short Answer
1. In your DNA extraction lab, why do we use strawberries and why do we have to mash them up?
(2 marks)
2. A mule is a hybrid that gets some of the best genes from a horse and a donkey. A mule has 63
chromosomes while a horse has 64 and a donkey has 62 chromosomes. Is a mule going to
experience problems in reproduction? Explain your answer (2 marks).
3. What will happen if one of your chromosomes got an extra copy by accident? (1 mark)
4. DNA contains the code to make many types of proteins, which are the building blocks for our
body. How do we go from DNA to proteins? (4 marks)
5. Name two differences and one similarity between sexual and asexual reproduction. (3 marks)