The given diagram represents:
- Mesosome
- Chromosome
- Ribosome
- Nucleosome
The Correct Option is D
Approach Solution - 1
The diagram presents a biological structure related to the organization of genetic material within a cell. Careful examination reveals the characteristic 'beads on a string' appearance, a fundamental level of DNA packaging.
The choices provided are:
- A) Mesosome
- B) Chromosome
- C) Ribosome
- D) Nucleosome
Given the 'beads on a string' morphology, and the context of molecular basis of inheritance (KCET 2022), the correct identification is a structure that combines DNA with histone proteins to form a fundamental unit of chromatin.
Therefore, the structure represented in the diagram is a:
D) Nucleosome
A nucleosome is composed of DNA wrapped around a core of histone proteins. These nucleosomes then further coil and condense to form higher-order structures, eventually leading to the formation of chromosomes.
Approach Solution -2
Let's consider the typical structure of a nucleosome:
A nucleosome is a basic structural unit of DNA packaging in eukaryotes. It consists of:
- A core of eight histone proteins (histone octamer): Two molecules each of histones H2A, H2B, H3, and H4.
- DNA: Approximately 146 base pairs of DNA wrapped around the histone octamer.
- Linker DNA: A short stretch of DNA that connects adjacent nucleosomes.
Therefore, if the diagram showed a DNA strand wrapped around a cluster of proteins, it would indeed represent a nucleosome.
Top Questions on Cell structure and organelles
- Arrange the chromosomal events of meiosis in correct sequence:
List:
I) Disappearing of nucleolus
II) Appearance of recombination nodule on chromatids
III) Terminalisation of chiasmata
IV) Pairing of chromosomes
V) Dissolution of synaptonemal complex- AP EAPCET - 2025
- Botany
- Cell structure and organelles
- Choose the correct statements among the following:
I. Quasi-fluid nature of lipids enables lateral movement of proteins.
II. Mitochondria and chloroplast constitute endomembrane system.
III. Phosphate granules are not membrane bound bodies.
IV. Centriole is a component in all cells.- AP EAPCET - 2025
- Botany
- Cell structure and organelles
- Statement I: Lysosomes were found to be very rich in hydrolytic enzymes.
Statement II: These enzymes are optimally active at the basic pH.
Identify the correct option from the following:- AP EAPCET - 2025
- Botany
- Cell structure and organelles
Match List I with List II:
Choose the correct answer from the options given below:
- NEET (UG) - 2025
- Biology
- Cell structure and organelles
- Given below are two statements:
Statement I: Mitochondria and chloroplasts both double membranes bound organelles.
Statement II: Inner membrane of mitochondria is relatively less permeable, as compared chloroplast. I
In the light of the above statements, choose the mis appropriate answer from the options given below- NEET (UG) - 2024
- Biology
- Cell structure and organelles
Questions Asked in KCET exam
- The derivative of \( \sin x \) with respect to \( \log x \) is:
- KCET - 2025
- Derivatives
- If the number of terms in the binomial expansion of \((2x + 3)^n\) is 22, then the value of \(n\) is:
- KCET - 2025
- Binomial theorem
- A horizontal pipe carries water in a streamlined flow. At a point along the pipe, where the cross-sectional area is \( 10 \, \text{cm}^2 \), the velocity of water is 1 m/s and the pressure is 2000 Pa. What is the pressure of water at another point where the cross-sectional area is \( 5 \, \text{cm}^2 \)? [Density of water = 1000 kg/m³]
- KCET - 2025
- Heat Transfer
- A series LCR circuit containing an AC source of 100V has an inductor and a capacitor of reactances 24\(\Omega\) and 16\(\Omega\) respectively. If a resistance of 6\(\Omega\) is connected in series, then the potential difference across the series combination of inductor and capacitor will be
- KCET - 2025
- Electromagnetic waves
- The correct statement/s about Galvanic cell is/are:
(a) Current flows from cathode to anode
(b) Anode is positive terminal
(c) If \(E_{\text{cell}} < 0\), then it is spontaneous reaction
(d) Cathode is positive terminal- KCET - 2025
- Electrochemistry