Question
Draw a labelled schematic structure of a transcription unit. Explain the function of each component in the unit in the process of transcription.
✓
Answer
Transcription unit: The transcription unit of DNA contains three regions in the DNA:
- The promoter: It is the binding site for RNA polymerase for initiation of transcription.
- The structural gene: It codes for enzyme or protein for structural functions.
- The terminator: It is the region where transcription ends.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Match the items in Column I with those in Column II
|
S.No.
|
Column I
|
S.No.
|
Column II
|
|
(A)
|
Standing crop
|
(i)
|
The amount of mineral nutrients in the soil at a given time
|
|
(B)
|
Standing state
|
(ii)
|
Sedementary cycle
|
|
(C)
|
Climax community
|
(iii)
|
Herbivores and carnivores
|
|
(D)
|
Primary producers
|
(iv)
|
In near equilibrium with the environment
|
|
(E)
|
Phosporus cycle
|
(v)
|
Mass of living matter in a trophic level at a given time
|
|
(F)
|
Secondary producers
|
(vi)
|
Phytoplanktons
|
What is innate immunity? How is it accomplished in a human body?
Write the name of causative agent and symptoms of following sexually transmitted diseases.
1. Syphilis, 2. Gonorrhea, 3. Herpes Genitalis, 4. Trichomoniasis, 5. Chalmydiasis, 6. AIDS, 7. Genital Warts, 8. Vaginitis.
1. Syphilis, 2. Gonorrhea, 3. Herpes Genitalis, 4. Trichomoniasis, 5. Chalmydiasis, 6. AIDS, 7. Genital Warts, 8. Vaginitis.
Two organisms occupying a particular geographical area (say desert) show similar adaptive strategies. Taking examples, describe the phenomenon.
Fill in the blanks,
|
Species A
|
Species B
|
Type of Interaction
|
Example
|
|
+
+
+
|
-
+
_____
|
_____
_____
Commensalism
|
_____
_____
_____
|
Does apiculture offer multiple advantages to farmers? List its advantages if it is located near a place of commercial flower cultivation.
a. Explain the process of syngamy and triple fusion in angiosperms.
b. Trace the development of the product of syngamy upto its mature stage in a dicot plant.
c. Draw and label three important parts of a mature dicot embryo.
b. Trace the development of the product of syngamy upto its mature stage in a dicot plant.
c. Draw and label three important parts of a mature dicot embryo.
Using various resources such as your school Library or the internet and discussions with your teacher, trace the evolutionary stages of any one animal say horse.
- Explain with the help of Griffith’s experiment how the search for genetic material was conducted and what was the conclusion drawn?
- How did MacLeod, McCarty and Avery establish the biochemical nature of the so called ‘genetic material’ identified by Griffith in his experiment.
Draw the structure of HIV virus of AIDS and give its transmission, symptoms and treatment.
OR
Draw a labeled picture of HIV. Describe its structure.
OR
Draw a labeled picture of HIV. Describe its structure.