Answer all the questions
Question 21
In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of ______.
a
Guanine
b
Uracil
c
Cytosine
d
Thymine
Question 22
Which of the following is a nucleotide found in DNA?
a
deoxyribose + phosphate group + uracil
b
ribose + phosphate group + uracil
c
ribose + phosphate group + thymine
d
deoxyribose + phosphate group + cytosine
Question 23
Look at the structure below.
Structure X includes a deoxyribose sugar, a phosphate group, and a nitrogenous base. What is this structure called?
a
complementary base pair
b
nucleotide
c
hydrogen bond
d
sugar-phosphate backbone
Question 24
The regions in a newly copied strand of mRNA that code for proteins are called what?
a
molecules
b
introns
c
exons
d
amino acids
Question 25
What type of chromosomal mutation has taken place?
a
deletion
b
inversion
c
translocation
d
duplication
Question 26
What type of chromosomal mutation has taken place?
a
inversion
b
deletion
c
duplication
d
translocation
Question 27
The use of genetic engineering to transfer human genes into bacteria
a
is impossible with current technology.
b
causes the human genes to manufacture bacterial proteins.
c
results in the formation of a new species of organism.
d
allows the bacteria to produce human proteins.
Question 28
DNA fingerprinting has been used in criminal investigations because
DNA fingerprinting | Definition, Examples, & Facts | Britannica
a
DNA analysis allows investigators to distinguish body cells of different individuals, who are unlikely to have the same DNA.
b
criminals leave DNA samples behind them when they touch an object at a crime scene.
c
DNA found on murder weapons is easy to identify.
d
bacterial DNA on the hands of criminals may provide a clue as to where that person was when the crime was committed.
Question 21: a) Guanine
Question 22: c) deoxyribose + phosphate group + thymine
Question 23: b) nucleotide
Question 24: c) exons
Question 25: a) deletion
Question 26: d) translocation
Question 27: d) allows the bacteria to produce human proteins
Question 28: a) DNA analysis allows investigators to distinguish body cells of different individuals, who are unlikely to have the same DNA.