MEDIUM

Earn 100

In a DNA molecule, if the number of phosphodiester bonds is 198, it has ______ bases.

50% studentsanswered this correctly

Important Questions on Molecular Basis of inheritance

HARD

Biology>Molecular Biology>Molecular Basis of inheritance>Structure of DNA and DNA Packaging

Describe Watson and Crick Model of DNA with diagram.

EASY

Biology>Molecular Biology>Molecular Basis of inheritance>Structure of DNA and DNA Packaging

Assertion (

A

): Purine always comes opposite to a pyrimidine.
Reason (R): Appropriate uniform distance is maintained between the two strands of the

DNA

helix.

MEDIUM

Biology>Molecular Biology>Molecular Basis of inheritance>Structure of DNA and DNA Packaging

Write the dual purpose served by deoxyribonucleoside triphosphate in polymerisation.

EASY

Biology>Molecular Biology>Molecular Basis of inheritance>Structure of DNA and DNA Packaging

Considering the average molecular mass of a base to be 500 Da, what is the molecular mass of double stranded DNA of 10 base pairs?

HARD

Biology>Molecular Biology>Molecular Basis of inheritance>Structure of DNA and DNA Packaging

The average energy of each hydrogen bond in

A - T

pair is

x kcal

{mol}^{- 1}

and that in

G - C

pair is

y {kcalmol}^{- 1}

. Assuming that no other interaction exists between the nucleotides, the approximate energy required in

{kcalmol}^{- 1}

to split the following double stranded

DNA

into two single strands is
Question Image

[Each dashed line may represent more than one hydrogen bond between the base pairs]

EASY

Biology>Molecular Biology>Molecular Basis of inheritance>Structure of DNA and DNA Packaging

What is a palindrome? Give an example of a palindromic sequence.

MEDIUM

Biology>Molecular Biology>Molecular Basis of inheritance>Structure of DNA and DNA Packaging

Sugar moiety in DNA and RNA molecules respectively are

MEDIUM

Biology>Molecular Biology>Molecular Basis of inheritance>Structure of DNA and DNA Packaging

List three main differences between DNA and RNA.

HARD

Biology>Molecular Biology>Molecular Basis of inheritance>Structure of DNA and DNA Packaging

A newly discovered organism possesses a genetic material with a new base composition consisting of the sugar and phosphate backbone as found in existing natural

DNA

. The five novel bases in this genetic material-namely,

P, Q, R, S, T

are heterocyclic structures with

1, 1, 2, 2

and

3

rings, respectively. Assuming the new

DNA

forms a double helix of uniform width, which one of the following would be the most appropriate base pairing?

MEDIUM

Biology>Molecular Biology>Molecular Basis of inheritance>Structure of DNA and DNA Packaging

Match the following lists:

	List $I$		List $II$
A)	X-ray diffraction data	$I)$	Chargaff
B)	DNA double stranded	$II)$	Meischer
C)	DNA double helix	$III)$	Wilkins
D)	DNA as an acidic substance	$IV)$	Watson $&$ Crick