The region of chromatin that are actively transcribed are thought to be:
Show Hint
- Heterochromatin
- Euchromatin
- Scaffold chromatin
- Solenoid chromatin
The Correct Option is B
Solution and Explanation
Top Questions on Molecular Basis of Inheritance
- Which enzyme(s) will be produced in a bacterial cell in which ‘UAG’ is inserted in the ‘lac-y gene’ due to mutation? Choose the correct option:
- CBSE CLASS XII - 2025
- Biology
- Molecular Basis of Inheritance
- Isolation of DNA from a bacterial cell can be achieved by using:
- CBSE CLASS XII - 2025
- Biology
- Molecular Basis of Inheritance
- The approach of sequencing the whole set of genome, including all the coding and non-coding sequences in HGP is:
- CBSE CLASS XII - 2025
- Biology
- Molecular Basis of Inheritance
The process of copying the genetic information from one strand of DNA into RNA is termed as transcription. The principle of complementarity of bases governs the process of transcription, also except that uracil comes in place of thymine.
Study the complete transcription unit given below and answer the following questions:
(a) Name the main enzyme involved in the process of transcription.
(b) Identify coding strand and template strand of DNA in the transcription unit.
Attempt either sub-part (c) or (d):
(c) Identify (C) and (D) in the diagram, mention their significance in the process of transcription.
OR
(d) Describe the location of (C) and (D) in the transcription unit.}
- CBSE CLASS XII - 2025
- Biology
- Molecular Basis of Inheritance
- If Meselson and Stahl's experiment is continued for 80 minutes (till III generation), what would be the ratio of DNA containing N$^{15}$/N$^{15}$ : N$^{15}$/N$^{14}$ : N$^{14}$/N$^{14}$ in the medium?
- CBSE CLASS XII - 2025
- Biology
- Molecular Basis of Inheritance
Questions Asked in CBSE CLASS XII exam
- A battery of emf \( E \) and internal resistance \( r \) is connected to a rheostat. When a current of 2A is drawn from the battery, the potential difference across the rheostat is 5V. The potential difference becomes 4V when a current of 4A is drawn from the battery. Calculate the value of \( E \) and \( r \).
- CBSE CLASS XII - 2025
- Current electricity
- Calculate the value of the current passing through the battery in the given circuit diagram.
- CBSE CLASS XII - 2025
- Current electricity
(a) Calculate the standard Gibbs energy (\(\Delta G^\circ\)) of the following reaction at 25°C:
\(\text{Au(s) + Ca\(^{2+}\)(1M) $\rightarrow$ Au\(^{3+}\)(1M) + Ca(s)} \)
\(\text{E\(^\circ_{\text{Au}^{3+}/\text{Au}} = +1.5 V, E\)\(^\circ_{\text{Ca}^{2+}/\text{Ca}} = -2.87 V\)}\)
\(\text{1 F} = 96500 C mol^{-1}\)- CBSE CLASS XII - 2025
- Electrochemistry
Define the following:
(i) Cell potential
(ii) Fuel Cell- CBSE CLASS XII - 2025
- Electrochemistry
Calculate the emf of the following cell at 25°C:
\[ \text{Zn(s)} | \text{Zn}^{2+}(0.1M) || \text{Cd}^{2+}(0.01M) | \text{Cd(s)} \] Given: \[ E^\circ_{\text{Cd}^{2+}/\text{Cd}} = -0.40 \, V, \, E^\circ_{\text{Zn}^{2+}/\text{Zn}} = -0.76 \, V \] \[ [\log 10 = 1] \]- CBSE CLASS XII - 2025
- Electrochemistry