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Science-Biology Chapters 11-15 Quiz

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 


Chromatids that are attached at the centromere are called ______ chromatids. Chapter 11
a.
mother
d.
sister
b.
daughter
e.
duplicated
c.
preprogrammed
 

 2. 


Why are telomeres important? Chapter 11
a.
They keep track of the number of cell divisions that a cell undergoes.
d.
They provide a site of attachment for spindles in cell division.
b.
They provide extra nucleotides when needed during replication.
e.
They provide a buffer against the loss of more valuable DNA.
c.
They are needed for histone and DNA arrangement. 
 

 3. 





Chapter 11
a.
centromeres
d.
centrioles
b.
centrobodies
e.
centers
c.
centrophils
 

 4. 

  In asexual reproduction, new combinations of genes arise by
Chapter 12
a.
mutation.
d.
crossing over
b.
random segregation of chromosomes into gametes.
e.
new combinations of genes do not occur.
c.
random assortment of gametes.
 

 5. 

Asexually produced daughter cells are  Chapter 12
a.
identical to each other.
d.
different from each other.
b.
identical to the mother cell.
e.
identtical to each other and identical to the mother cell.
c.
different from the mother cell.
 

 6. 

   In Mendel's time, most people believed that  Chapter 13
a.
all genetic traits bred true.
d.
acquired characteristics were inherited.
b.
only certain forms of domesticated plants and animals bred true.
e.
the inheritance of traits was controlled by factors in blood.
c.
the characteristics of parents were blended in the offspring.
 

 7. 

  A locus is
 


   Chapter 13
a.
a recessive gene
d.
the location of an allele on a chromosome
b.
an unmatched allele
e.
a dominant gene
c.
a sex chromosome
 

 8. 

Chapter 14 In humans, skin cell organelles called _____ produce pigment.
a.
vesicles
d.
lysosomes
b.
Melanosomes
e.
lysosomes
c.
endoplasmic reticulum
 

 9. 

In a pedigree chart, a female who does not demonstrate the trait being studied is represented by a Chapter 14
a.
darkened square
d.
darkened triangle
b.
clear diamond
e.
darkened oval
c.
clear circle
 

 10. 


Enzymes used to cut DNA molecules in recombinant DNA research are:
      Chapter 15
a.
ligases
d.
DNA polymerases
b.
restriction enzymes
e.
replicases
c.
transcriptases
 

 11. 


During the Human Genome Project, what was the major aim of the private company Celera Genomics by sequencing the human genome first? Chapter 15
a.
a monopoly of drugs based on the genome
d.
recognition in the scientific community
b.
a patent on the human genome
e.
government funding for future projects
c.
leverage with pharmaceutical lobbyistsgovernment funding for future projects
 



 
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