MCQ
In double strand helix structure of $DNA,$ thymine forms hydrogen bonds with
- AGuanine $(G)$
- BUracil $(U)$
- CCytosine $(C)$
- ✓Adenine $(A)$
✓
Answer
Correct option: D.
Adenine $(A)$
d
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
product; $S_{N^2}$ product of the reaction is
→Which of the following isomerism is not possible for complexes having molecular formula :
$(i)\, Pt(SCN)_2 · 3PEt_3$
→$(i)\, Pt(SCN)_2 · 3PEt_3$
$(ii)\, CoBr · SO_4 · 5NH_3$
$(iii)\, FeCl_3 · 6H_2O$
Formation of 2-butene as a major product by dehydration of 2-butanol is according to:
$12\,g$ of urea is dissolved in $1\,litre$ of water and $68.4\,g$ of sucrose is dissolved in $1\, litre$ of water. The lowering of vapour pressure of first case is
→Isobutyraldehyde on reaction with formaldehyde and $K _{2} CO _{3}$ gives compound $'A'.$ Compound $'A'$ reacts with $KCN$ and yields compound $'B',$ which on hydrolysis gives a stable compound $'C'.$ The compound $'C'$ is .... .
→(i) Copper metal dissolves in $1M $ silver nitrate solution and crystals of silver metal get deposited.
→(ii) Silver metal does not react with $1 M$ zinc nitrate solution
(iii) Zinc metal dissolves in $1M$ copper sulphate solution and copper metal gets depositedHence the order of decreasing strength of the three metals as reducing agents will be
Which element from $V$ group, gives most basic compound with hydrogen
→How many primary amines are possible from the molecular formula $C _4 H _{11} N$ ?
→In $C{l_2}{O_6}\left( l \right) + HF \to P + Q$ If $H $ of acid $HF$ attaches with $Q$, then correct option for hybridization of $Cl-$ atom and $\angle OClO$ in the $P$ and $Q$ ions
→Assertion : The free gaseous $Cr$ atom has six unpaired electrons
→Reason : Half-filled s orbital has greater stability.