The term Nucleic Acid was first used by:
(a) Miescher
(b) Mendel
(c) Altmann
(d) Watson and Crick
DNA is a polymer of:
(a) Amino acids
(b) Nucleosides
(c)Nucleotides
(d) None of the above
In a DNA molecule, thymine always pairs with:
(a)Adenine
(b) Cytosine
(c) Guanine
(d) Uracil
The double helical structure of DNA was proposed by:
(a) Avery, MacLeod and McCarty
(b)Watson and Crick
(c) Griffith
(d) Beadle and Tatum
DNA as the genetic material was first discovered by:
(a) Griffith
(b) Hershey and Chase
(c) Avery, MacLeod and McCarty
(d) Benzer
In DNA molecule, adenine and thymine bases are joined by:
(a) Single hydrogen bonds
(b)Double hydrogen bonds
(c) Triple hydrogen bonds
(d) All of the above
In DNA, guanine and cytosine bases are joined by:
(a) Double phosphate bonds
(b) Triple phosphate bonds
(c)Triple hydrogen bonds
(d) All of the above
Purines are compounds with:
(a) Single ring
(b) Triple ring
(c)Double ring
(d) All of the above
In RNA molecule, uracil is present in place of:
(a) Adenine
(b)Thymine
(c) Guanine
(d) Cytosine
RNA acts as a genetic material in:
(a)Tobacco mosaic virus
(b) E. coli
(c) Neurospora
(d) None of the above
Normally crossing over promotes
A) Recombination
B) Parental types
C) Linkage
D) All of these
Frequency of crossing over never exceeds from
A) 5
B) 50
C) 25
D) 35
Linkage can be determined by
A) Test cross method
B) Repeated inter mating
C) Top cross method
D) Back cross method
Mendel discovered laws of inheritance working with
A) Drosophila
B) Garden pea
C) Barley
D) Maize
How many characters did Mendel study in garden pea?
A) 7
B) 10
C) 12
D) 14
When centromere is involved in the inversion, it is known as_____ inversion
A) Metacentric
B) Pericentric
C) Peracentric
D) Telocentric
The change in chromosome number which involves entire set is called
A) Anueploidy
B) Polyploidy
C) Euploidy
D) None of the above

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