Question:
Alpha-helix and beta-sheet protein structures belong to which category of structure?
Alpha-helix and beta-sheet protein structures belong to which category of structure?
Updated On: Jan 14, 2026
- Primary structure
- Secondary structure
- Tertiary structure
- Quaternary structure
Hide Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Alpha-helix and beta-sheet are types of secondary structures in proteins. The secondary structure refers to the local folded structures that form within a polypeptide due to interactions between the backbone's amide hydrogen and carbonyl oxygen atoms. These structures are stabilized by hydrogen bonds.
- Primary structure refers to the linear sequence of amino acids.
- Secondary structure includes alpha-helices and beta-sheets.
- Tertiary structure involves the overall 3D shape of the polypeptide.
- Quaternary structure involves the association of multiple polypeptides to form a functional protein.
Thus, the correct answer is (b) Secondary structure.
Was this answer helpful?
0
0
Top Questions on Miscellaneous
- Three persons enter a lift at the ground floor. The lift will go up to the 10th floor. The number of ways in which the three persons can exit the lift at three different floors, if the lift does not stop at the 1st, 2nd and 3rd floors, is equal to _______.
- JEE Main - 2026
- Mathematics
- Miscellaneous
- If \[ \sum_{r=1}^{25}\left(\frac{r}{r^4+r^2+1}\right)=\frac{p}{q}, \] where \(p\) and \(q\) are positive integers such that \(\gcd(p,q)=1\), then \(p+q\) is equal to _______.
- JEE Main - 2026
- Mathematics
- Miscellaneous
- The sum of all the elements in the range of
\[ f(x)=\operatorname{sgn}(\sin x)+\operatorname{sgn}(\cos x) +\operatorname{sgn}(\tan x)+\operatorname{sgn}(\cot x), \]
where
\[ x\neq \frac{n\pi}{2},\ n\in\mathbb{Z}, \]
and
\[ \operatorname{sgn}(t)= \begin{cases} 1, & t>0 \\ -1, & t<0 \end{cases} \]
is:
- JEE Main - 2026
- Mathematics
- Miscellaneous
- Let \[ A=\{z\in\mathbb{C}:|z-2|\le 4\} \quad\text{and}\quad B=\{z\in\mathbb{C}:|z-2|+|z+2|=5\}. \] Then the maximum value of \(|z_1-z_2|\), where \(z_1\in A\) and \(z_2\in B\), is:
- JEE Main - 2026
- Mathematics
- Miscellaneous
- Considering the principal values of inverse trigonometric functions, the value of \[ \tan\!\left(2\sin^{-1}\!\frac{2}{\sqrt{13}}-2\cos^{-1}\!\frac{3}{\sqrt{10}}\right) \] is equal to:
- JEE Main - 2026
- Mathematics
- Miscellaneous
View More Questions
Questions Asked in JEE Main exam
- The sum of all possible values of \( n \in \mathbb{N} \), so that the coefficients of \(x, x^2\) and \(x^3\) in the expansion of \((1+x^2)^2(1+x)^n\) are in arithmetic progression is :
- JEE Main - 2026
- Integration
- In a microscope of tube length $10\,\text{cm}$ two convex lenses are arranged with focal lengths $2\,\text{cm}$ and $5\,\text{cm}$. Total magnification obtained with this system for normal adjustment is $(5)^k$. The value of $k$ is ___.
- JEE Main - 2026
- Optical Instruments
Which one of the following graphs accurately represents the plot of partial pressure of CS₂ vs its mole fraction in a mixture of acetone and CS₂ at constant temperature?
- JEE Main - 2026
- Organic Chemistry
- Let \( ABC \) be an equilateral triangle with orthocenter at the origin and the side \( BC \) lying on the line \( x+2\sqrt{2}\,y=4 \). If the coordinates of the vertex \( A \) are \( (\alpha,\beta) \), then the greatest integer less than or equal to \( |\alpha+\sqrt{2}\beta| \) is:
- JEE Main - 2026
- Coordinate Geometry
- Three charges $+2q$, $+3q$ and $-4q$ are situated at $(0,-3a)$, $(2a,0)$ and $(-2a,0)$ respectively in the $x$-$y$ plane. The resultant dipole moment about origin is ___.
- JEE Main - 2026
- Electromagnetic waves
View More Questions