MCQ
The reason for double helical structure of $DNA$ is operation of
- AVander Waal's forces
- BDipole-dipole interaction
- ✓Hydrogen bonding
- DElectrostatic attractions
✓
Answer
Correct option: C.
Hydrogen bonding
c
$DNA$ is the chemical name for the molecule that carries the genetic information of all living beings.
$DNA$ is the chemical name for the molecule that carries the genetic information of all living beings.
The polymer molecule consists of $2$ strands that wind around each other to create a form called a spiral. Every strand includes
a backbone manufactured from alternating sugar (deoxyribose) and phosphate molecules.
The two polynucleotide chains or strands of polymer are joined up by Hbonding.
Adenine-Thymine ( has two $H-$bonds) and Cytosine-Guanine (has three $H-$bonds).
Therefore the double-helical structure of $DNA$ is due to $H$-bonding.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Angular momentum of electron in second shell of $Li^{+2}$ ion is
→Osazone formation involves only $2$ carbon atoms of glucose because of
→Which of the following statements is not correct about rusting of iron?
The maximum number of electrons that can be accommodated in $'f'$ sub shell is
→Silver ions are added to a solution with
→$[Br^-] = [Cl^-] = [CO_3^{2-} ] = [AsO_4^{3-}] = 0.1\,M$.
Which compound will precipitate with lowest $[Ag^+]$ ?
The correct sequence of polarity of the following molecule
$(1)$ Benzene $(2)$ Inorganic Benzene
$(3)\, PCl_3F_2$ $(4)\, PCl_2F_3$
→$(1)$ Benzene $(2)$ Inorganic Benzene
$(3)\, PCl_3F_2$ $(4)\, PCl_2F_3$
$1\,\,\,$-$\,\,\,2\,\,\,$-$\,\,\,3\,\,\,$-$\,\,\,4$
(Where. $P =$ polar, $NP =$ non-polar)
An element has the electronic configuration $1{s^2},2{s^2}2{p^6},3{s^2}3{p^2}$. Its valency electrons are
→The boiling point of methanol is greater than that of methyl thiol because
When $1.0\ g$ of solid oxalic acid ($H_2C_2O_4$) is burned in a bomb calorimeter whose heat capacity is $8.75\ kJ/K$, the temperature increases by $0.312\ K$. The enthalpy of combustion of oxalic acid at $27\,^oC$ is
→The value of Planck’s constant is $6.63 \times {10^{ - 34}}Js.$ The velocity of light is $3.0 \times {10^8}\,m{s^{ - 1}}$. Which value is closest to the wavelength in nanometres of a quantum of light with frequency of $8 \times {10^{15}}{s^{ - 1}}$
→