Given below are two statements:
Statement I: In prokaryotes, the positively charged DNA is held with some negatively charged proteins in a region called nucleoid.
Statement II: In eukaryotes, the negatively charged DNA is wrapped around the positively charged histone octamer to form nucleosome.
In the light of the above statements, choose the correct answer from the options given below :
Given below are two statements:
Statement I: In prokaryotes, the positively charged DNA is held with some negatively charged proteins in a region called nucleoid.
Statement II: In eukaryotes, the negatively charged DNA is wrapped around the positively charged histone octamer to form nucleosome.
In the light of the above statements, choose the correct answer from the options given below :
- Both Statement I and Statement II are false.
- Statement I is true but Statement II is false.
- Statement I is false but Statement II is true.
- Both Statement I and Statement II are true.
The Correct Option is C
Solution and Explanation
To determine the correctness of the given statements about DNA structures in prokaryotes and eukaryotes, it's essential to evaluate each independently:
- Statement I: In prokaryotes, it is stated that positively charged DNA is held with negatively charged proteins in a region called the nucleoid. In reality, the DNA in prokaryotes is negatively charged due to phosphate groups, and it is not associated with histone proteins as in eukaryotes. Instead, it is simply condensed in the nucleoid without the involvement of positively charged proteins. Thus, this statement is incorrect.
- Statement II: This statement is about eukaryotic DNA being wrapped around positively charged histone proteins to form a nucleosome. This is accurate; eukaryotic DNA, which is negatively charged, indeed wraps around histones forming a nucleosome structure. Therefore, this statement is correct.
Given the analysis above, the appropriate choice is:
Top Questions on Biomolecules
- What is peptide bond? How is it formed? Write the name and formula of the reagent used to convert alkylhalide to nitroalkane.
- Write preparation of glucose from sucrose.
Which of the following are chiral molecules?
Choose the correct answer from the options given below:
- CUET (PG) - 2025
- Bioinformatics
- Biomolecules
- Even at relatively high resolution, most of the peaks in a HNMR spectrum of a protein are broad, which makes it difficult to extract information about biological samples using NMR. This is because:
- CUET (PG) - 2025
- Bioinformatics
- Biomolecules
- The structure of protein comprises of:
(A). Primary structure of protein is associated with amino acids
(B). Secondary structure of protein is associated to peptides
(C). Tertiary structure of protein is associated with polypeptide chains
(D). Quaternary structure of protein is associated with polypeptide chains
Choose the correct answer from the options given below:- CUET (PG) - 2025
- Bioinformatics
- Biomolecules
Questions Asked in NEET exam
A bob of heavy mass \(m\) is suspended by a light string of length \(l\). The bob is given a horizontal velocity \(v_0\) as shown in figure. If the string gets slack at some point P making an angle \( \theta \) from the horizontal, the ratio of the speed \(v\) of the bob at point P to its initial speed \(v_0\) is :
- NEET (UG) - 2025
- Pendulums
- An oxygen cylinder of volume 30 litre has 18.20 moles of oxygen. After some oxygen is withdrawn from the cylinder, its gauge pressure drops to 11 atmospheric pressure at temperature \(27^\circ\)C. The mass of the oxygen withdrawn from the cylinder is nearly equal to: [Given, \(R = \frac{100}{12} \text{ J mol}^{-1} \text{K}^{-1}\), and molecular mass of \(O_2 = 32 \text{ g/mol}\), 1 atm pressure = \(1.01 \times 10^5 \text{ N/m}^2\)]
- NEET (UG) - 2025
- Ideal-gas equation and absolute temperature
- A uniform rod of mass 20 kg and length 5 m leans against a smooth vertical wall making an angle of \(60^\circ\) with it. The other end rests on a rough horizontal floor. The friction force that the floor exerts on the rod is (take \(g = 10\) m/s\(^2\)):
- NEET (UG) - 2025
- Common forces in mechanics
- A wire of resistance \(R\) is cut into 8 equal pieces. From these pieces, two equivalent resistances are made by adding four of these together in parallel. Then these two are added in series. The net effective resistance of the combination is:
- NEET (UG) - 2025
- Resistance
- Which of the following organisms cannot fix nitrogen? A. Azotobacter
B. Oscillatoria
C. Anabaena
D. Volvox
E. Nostoc
Choose the correct answer from the options given below:- NEET (UG) - 2025
- Nitrogen Fixation
Concepts Used:
Enzymes - Biology
Enzymes are proteins that help accelerate metabolism or the chemical reactions in our bodies. They build some substances and decompose others. All living creatures have enzymes.
Our bodies naturally build enzymes. But enzymes are also in mass produce products and food.
One of the most important roles of enzymes is to succor digestion. The process of turning the food that we eat into energy is called digestion. For instance, there are enzymes in our saliva, pancreas, stomach, and intestines. They decompose fats, proteins, and carbohydrates. Enzymes make use of these nutrients for growth and cell repair.