MCQ
The helical structure of proteins is established by
- APeptide bonds
- BDipeptide bond
- ✓Hydrogen bond
- DVander Waal's forces
✓
Answer
Correct option: C.
Hydrogen bond
c
The alpha helix ( $\alpha$-helix) is a common motif in the secondary structure of proteins and is a right hand-helix conformation in which every backbone $N - H$ group hydrogen bonds to the backbone $C = O$. group of the amino acid located three or four residues earlier along the protein sequence.
The alpha helix ( $\alpha$-helix) is a common motif in the secondary structure of proteins and is a right hand-helix conformation in which every backbone $N - H$ group hydrogen bonds to the backbone $C = O$. group of the amino acid located three or four residues earlier along the protein sequence.
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
$\mathrm{NaCl}$ reacts with conc. $\mathrm{H}_2 \mathrm{SO}_4$ and $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ to give reddish fumes $(B),$ which react with $\mathrm{NaOH}$ to give yellow solution $(C)$. $(B)$ and $(C)$ respectively are ;
→Catalytic hydrogenation of benzene gives
Match List$-I$ with List$-II$
→| List$-I$ | List$-II$ | ||
| $(a)$ | Sucrose | $(i)$ |
$\beta$ -D-Galactose and $\beta$ -D-Glucose |
| $(b)$ | Lactose | $(ii)$ | $\alpha$ -D-Glucose and $\beta$ -D-Fructose |
| $(c)$ | Maltose | $(iii)$ | $\alpha$ -D-Glucose and $\alpha$ -D-Glucose |
Choose the correct answer from the options given below:
Half life period of a first order reaction is $ 138.6$ minutes. The velocity constant of the reaction is
→Identify $'A'$
→For the reaction, $N _2+3 H _2 \rightarrow 2 \mathrm { NH } _ { 3 }$, if :
$\frac{ d \left[ NH _3\right]}{ dt }=3 \times 10^{-4} mol L ^{-1}$, the value of $\frac{- d \left[ N _2\right]}{ dt }$ would be :
→Choose the correct statements from the following
→$A$. $\mathrm{Mn}_2 \mathrm{O}_7$ is an oil at room temperature
$B$. $\mathrm{V}_2 \mathrm{O}_4$ reacts with acid to give $\mathrm{VO}_2^{2+}$
$C$. $\mathrm{CrO}$ is a basic oxide
$D$. $\mathrm{V}_2 \mathrm{O}_5$ does not react with acid
Choose the correct answer from the options given below :
The maximum wavelength of radiation that can ionise a sodium atom is $2414 \,\mathop A\limits^o .$ The ionisation energy of sodium per mole shall be
→Incorrect statements regarding above reaction is
Point out the wrong statement :On moving horizontally from left to right across a period in the periodic table