Q. 15.0( 2 Votes )

Fill in the blanks:

(i) Chromatin fibre is made up of DNA and ………………………….

(ii) The chromatids are attached to each other at ………………………….

(iii) DNA replicates in the ..………………………………... of the cell cycle.

(iv) Who first discovered the structure of DNA? ………………………….

Answer :

(i) Histone

The chromatin material is comprised of DNA and histones. DNA comprising of 40% and a certain type of protein called histone, the rest 60%.


(ii) Centromere


Each chromosome consists of two chromatids which are attached to each other at some point called centromere. Chromosomes are attached to spindle fibres at the centromere.


(iii) S phase


S phase or synthesis phase is the second stage of cell cycle. In this phase DNA synthesis takes place.


(iv) James Watson and Francis Crick


The structure of DNA was first discovered by Watson and Crick in 1953. They were awarded Nobel prize for this in 1962.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
From single cell to babyFrom single cell to babyFrom single cell to baby45 mins
Structure of The EarthStructure of The EarthStructure of The Earth40 mins
Application of Euclids Division LemmaApplication of Euclids Division LemmaApplication of Euclids Division Lemma50 mins
Division Algorithm-1Division Algorithm-1Division Algorithm-130 mins
Interactive Quiz:Euclid's Division LemmaInteractive Quiz:Euclid's Division LemmaInteractive Quiz:Euclid's Division Lemma44 mins
Division Algorithm-2Division Algorithm-2Division Algorithm-234 mins
Euclids Division LemmaEuclids Division LemmaEuclids Division Lemma49 mins
Quiz - Division AlgorithmQuiz - Division AlgorithmQuiz - Division Algorithm38 mins
Quiz | Imp. Qs. on Division AlgorithmQuiz | Imp. Qs. on Division AlgorithmQuiz | Imp. Qs. on Division Algorithm54 mins
Foundation | NTSE-Current Division RuleFoundation | NTSE-Current Division RuleFoundation | NTSE-Current Division Rule43 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses