Question 1

A human somatic cell spends most of its life in this state:

Accepted Answer

A)  Meiosis 
B)  Mitosis 
C)  Interphase 
D)  Zygote 
E)  Prophase C

Question 2

In humans, DNA is associated with several classes of proteins and packaged into complexes known as:

Accepted Answer

A)  Histones 
B)  Chromatin 
C)  Nuclei 
D)  Genomes 
E)  Double helices B

Question 3

Failure of homologous chromosomes to segregate to opposite poles during meiosis is called:

Accepted Answer

A)  Disjunction 
B)  Missegregation 
C)  Nondisjunction 
D)  Meiotic failure 
E)  Nonsegregation C

Question 4

In human males, when is meiosis initiated and completed?

Accepted Answer

A)  At birth, at ejaculation 
B)  At puberty, at ejaculation 
C)  At birth, at puberty 
D)  At puberty, it is continuous 
E)  At birth, it is continuous

Question 5

An important and distinct feature of meiosis is:

Accepted Answer

A)  Recombination 
B)  Chromosome condensation 
C)  Chromosome congression 
D)  Spindle formation

Question 6

Mitosis and meiosis result in the following chromosome complements, respectively:

Accepted Answer

A)  n, 2n 
B)  2n, n 
C)  Haploid, diploid 
D)  2n, 2n 
E)  n, n

Question 7

The arms of a chromosome are designated:

Accepted Answer

A)  1 and 2 
B)  Short and long 
C)  p and q 
D)  Individually for each chromosome 
E)  A and B

Question 8

Which of the following represents the pairing of nucleotide bases in DNA?

Accepted Answer

A)  Purines-Purines, Pyrimidines-Pyrimidines 
B)  Adenine-Cytosine, Guanine-Thymine 
C)  Adenine-Guanine, Cytosine-Thymine 
D)  Guanine-Cytosine, Adenine-Thymine 
E)  Deoxyribose-Ribose

Question 9

How many chromosomes do humans normally have in their somatic cells?

Accepted Answer

A)  22 
B)  23 
C)  44 
D)  45 
E)  46

Question 10

Which of the following are composed of repetitive DNA elements?

Accepted Answer

A)  Centromeres 
B)  Alu elements 
C)  LINE elements 
D)  Telomeres 
E)  All of the above

Exam 2: Introduction to the Human Genome