enEnglishguગુજરાતી
NEET · Biology · STD 12 - 5. molecular basis of inheritance
The association of histone \(H_1\) with a nucleosome indicates that
- A \(DNA\) replication is occurring
- B the \(DNA\) is condensed into a chromatin fibre
- C the \(DNA\) double helix is exposed
- D transcription is occurring.
Answer & Solution
Correct Answer
(B) the \(DNA\) is condensed into a chromatin fibre
Step-by-step Solution
Detailed explanation
(b) : Histones help in packaging of \(DNA\). In eukaryotes, \(DNA\) packaging is carried out with the help of positively charged basic proteins called histones. Histones are of five types -\(H_1, H_2A, H_2B,H_3\) and \(H_4\). \(H_1\) is attached over the linker \(DNA\). Histone contains a large proportion of the positivelycharged (basic) amino acids, lysine and arginine in their structure. \(DNA\) is negatively charged due to the phosphate groups on its backbone. The result of these opposite charges is strong attraction and therefore, high binding affinity between histones and \(DNA\).
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Biology
- Match the stages of meiosis in column I to their characteristic features in column II and select the correct option using the codes given below.
Column \(-I\) Column \(-II\) (A) Pachytene (i) Pairing of homologous chromosomes (B) Metaphase\(-I\) (ii) Terminalisation of chiasmata (C) Diakinesis (iii) Crossing-over takes place (D) Zygotene (iv) Chromosomes align at equatorial plate NEET 2016 Medium - Oxidative phosphorylation isNEET 2016 Medium
- How many different proteins does the ribosome consist of?NEET 2023 Medium
- Consider the following :
A. The reductive division for the human female gametogenesis starts earlier than that of the male gametogenesis.
B. The gap between the first meiotic division and the second meiotic division is much shorter for males compared to females.
C. The first polar body is associated with the formation of the primary oocyte.
D. Luteinizing Hormone (LH) surge leads to disintegration of the endometrium and onset of menstrual bleeding.
Choose the correct answer from the options given below:NEET 2025 Medium - Fertilisation in humans is practically feasible only ifNEET 2016 Medium
- The reaction centre in \(PS\) \(II\) has an absorption maxima at \(............\,nm\)NEET 2023 Medium
More PYQs from NEET
- The electrostatic force between the metal plates of an isolated parallel plate capacitor \(C\) having a charge \(Q\) and area \(A,\) isNEET 2018 Easy
- For irreversible expansion of an ideal gas under isothermal condition, the correct option is :NEET 2021 Medium
- Gadolinium belongs to \(4f\) series. Its atomic number is \(64.\) Which of the following is the correct electronic configuration of gadolinium?NEET 2015 Medium
- Which of the following are paramagnetic?
A. \(\left[ NiCl _4\right]^{2-}\)
B. \(Ni ( CO )_4\)
C. \(\left[ Ni ( CN )_4\right]^{2-}\)
D. \(\left[ Ni \left( H _2 O \right)_6\right]^{2+}\)
E. \(Ni \left( PPh _3\right)_4\)
Choose the correct answer from the options given below :NEET 2025 Medium - Given below are two statements \(:\) one is labelled as Assertion \((A)\) and the other is labelled as Reason \((R).\) Assertion \((A) :\) \(I - Cl\) is more reactive than \(I _{2}\). Reason \((R):\) \(I - Cl\) bond is weaker than \(I-I\) bond. In the light of the above statements, choose the most appropriate answer from the options given below:NEET 2022 Hard
- Given below are two statements: One is labelled as Assertion \((A)\) and the other is labelled as Reason \((R)\). Assertion \((A)\):The stretching of a spring is determined by the shear modulus of the material of the spring. Reason \((R)\):A coil spring of copper has more tensile strength than a steel spring of same dimensions. In the light of the above statements, choose the most appropriate answer from the options given below:NEET 2022 Medium