WorksheetsDNA s
Total questions: 31
Worksheet time: 20mins
The enzyme that restores the phosphodiester linkage between adjacent fragments in the lagging strand during DNA replication is
DNA ligase
primase
reverse transcriptase
helicase
Who proved experimentally that DNA is genetic material?
O. Avery and Colleagues
J. Waston and F. Crick
W. Arber and Colleagues
G. Mendel
The enzyme DNA dependent RNA polymerase catalyses the polymerisation reaction in ___________direction.
only 5’ → 3’
only 3’ → 5’
both (a) and (b)
none of these
What is the function of primer
To help DNA polymerase for initiation
To help RNA polymerase for initiation
To help DNA polymerase for termination
To help RNA polymerase for termination
DNA replication takes place at _________ phase of the cell
cyle.
G1
S
G2
M
Which biomolecular group carries and passes on the hereditary information of the organism?
a. carbohydrates
b. lipids
c. nucleic acids
d. proteins
Which ones are purines?
Adenine and Guanine
Adenine and Thymine
Cytosine and Guanine
Cytosine and Thymine
If a gene has 30 nucleotides, how many amino acids does it have?
3
10
60
90
A piece of DNA was analysed and 15% of its nucleotides were adenine. What percentage would be uracil?
0%
15%
35%
70%
If you have 40 adenine in a DNA molecule, how many thymine can you expect?
10
20
40
80
What unique ability does DNA have because it is double-stranded?
it serves as genetic material in all viruses
it can serve as a template for its own copying
it can move around the cells
none of the choices
The repeating units in both DNA and RNA are called
hydrogen bonds
nucleic acids
nucleotides
amino acids
What is helix pitch?
Syn- and anti- conformations of nucleotide are related to
Phosphodiester bond
N-glycosidic bond
Phosphoanhydride bond
Hydrogen bond
The bond stabilizing DNA between bases at horizontal plane is
H-bond
London dispersion force
Hydrophobic interaction
All of the above
Which of the following statements is true?
B-form of DNA is left handed helix
Z-form of DNA is left handed helix
A-form of DNA is left handed helix
A-form of DNA is formed due to alternative purine pyrimidine ratio
Factors NOT affecting DNA conformation type (either B, Z or A)
Hydration level
Temperature
Salt concentartion
Sequences of DNA
Formation of A-DNA is favored by
High hydration
Low salt concentration
Low hydration
All of the above
Deoxyribose sugar in B- form of DNA is of ______ conformation
C1'-endo
C2'-endo
C3'-endo
C5'-endo
Watson and Crick built the model of _______ form of DNA
B
Z
A
C
What is hyperchromic shift?
Which enzyme can denature DNA intracelluarly?
Helicase
Denaturase
Nucleotidase
All of the above
DNA denaturation can not be done by
Heat
Sound wave
change in H+ ion concentration in solution
Chaotropic agents
What is the shape of DNA?
Double Hyperbola
Paraolic
Double Helix
Linear
What sugar is found in DNA?
Glucose
Ribose
Deoxyribose
Fructose
Which of the following is NOT part of a nucleotide?
Nitrogenous Base
Phosphate Group
Pentose Sugar
Fatty Acid
