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DNA
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Q1. Fill In the Blanks
• DNA is commonly called genetic material
• Process of synthesis of RNA by using one of the DNA strands
as template___________
• _______ are the segments of DNA, and it carries the genetic
or gene information over generations
• In DNA, _______ are the molecules attached to sugar
backbone to encode information.
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• The ____________ helix DNA has the 5’ and 3’ ends, in
which the 5' end has a terminal phosphate group and 3'
end has a terminal hydroxyl group.
• DNA is stabilized by _________ bonds and base stacking
interactions
• A base linked to a sugar is called a __________
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Q2. Using the diagram,answer the following questions
a. How many bases are there in this DNA structure ? _________
b. These two long strands are in the shape of a ________________ helix.
c. What type of bondings are seen in DNA double helix ?__________________
d. Name purines and Pyrimidines .
_____________,______________,_______________,___________________
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a. Which Process is shown in this diagram ?____________________________
b. DNA polymerase __________________ and synthesizes DNA.
c. How many steps are involved in this process ?________________________
d. On the lagging strand replication occurs in fragments –known as
____________________________fragments
e. The step in which Addition of bases with the help of DNA polymerase enzyme occurs is
called as __________________________________________ .
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• mRNA molecules translate the information into the proteins.
This process is known as__________
• Translation starts with the charging of the _________
• Where Translation occurs ?_____________________
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Multiple Choice Questions
1. Which of the following are pyrimidines?
i. adenine and cytosine
ii.
adenine and guanine
iii. adenine and thymine
iv. cytosine and guanine
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2. A nucleic acid was analyzed and found to contain 32
percent A, 18 percent G, 17 percent C, and 33 percent T.
The nucleic acid must be:
i. single-stranded RNA
ii. single-stranded DNA
iii. double-stranded RNA
iv. double-stranded DNA
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3. During replication, what enzyme adds complimentary bases?
i. helicase
ii. synthesase
iii. replicase
iv. polymerase
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4. In the semiconservative replication of DNA, progeny DNA
molecules consist of:
i. one-half of the molecules with two parental strands and
one-half of the molecules with two new strands
ii. all molecules with interspersed parental and new segments
iii. all molecules with one parental and one new strand
iv. all molecules with two new strands
© 2012 eTutorWorld Learning Solutions Private Limited, India, All rights reserved.