Bio 100
Practice questions for 3rd exam
1.
DNA in your chromosomes is composed of _______.
a. amino acids b. nucleotides c. nucleic acid d. glycogen e. both b and c are correct
2.
What is the correct base pairing for DNA double helix, for DNA transcription to RNA, for RNA
translation?
3.
How are the instructions encoded in DNA sometimes altered? Recognize the difference between a point
mutation and a frame shift mutation. Which type will always affect the shape of the protein?
4.
Where are proteins assembled and which molecules are involved in the process of making proteins.
5.
Explain the relationship between a gene and a genome and between genes and chromosomes.
6.
What’s the purpose of mitosis? (young, adult, 1-celled)
7.
Contrast offspring produced sexually and those produced asexually.
8.
What are the advantages and disadvantages of sexual reproduction?
9.
Contrast a sperm cell, an egg cell, and a somatic cell.
10.
What is the function of SRY gene?
11.
Contrast meiosis in human males and females.
12.
Draw metaphase of mitosis for a cell with 3 chromosomes.
13.
Alternative forms of a gene for a given trait are called
a. alleles
b. genotypes
c. phenotypes
14.
Human gametes contain
a.
twice the number of chromosomes than our skin cells
b.
only sex chromosomes
c.
half the number of chromosomes than our skin cells
d.
only x chromosomes
15.
Meiosis results in
a.
4 haploid cells
b.
2 diploid cells
c.
4 diploid cells
d.
2 haploid cells
16.
Genetic engineering
a.
can be used to make many copies of recombinant DNA introduced into a host cell
b.
can be used to alter the inherited characteristics of an organism
c.
raises ethical questions in the minds of some people
d.
all of the above
17.
Distinguish a prokaryotic cell from a eukaryotic cell in terms of location of DNA and number of
chromosomes