Download App

Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYMolecular Basis of Inheritance5 Marks
Question
  1. Identify the structure shown above.
  2. Redraw the structure as a replicating fork and label the parts.
  3. Write the source of energy for this replication and list the enzymes involved in this process.
  4. Mention the difference in the synthesis based on the polarity of the two template strands.
✓

Answer

  1. It represents the parental or template DNA strands, showing the replication fork.
  2.  
  1. The deoxyribonucleoside triphosphates provide energy.
  2. DNA dependent DNA polymerase and DNA ligases are the enzymes involved;
  1.  
  1. On the template strand with 3' → 5' polarity, DNA synthesis is continuous, in the 5' → 3' direction.
  2. On the template strand with 5' → 3' polarity, DNA synthesis is discontinuous; DNA strand is synthesised as short segments, also in the 5' → 3' direction and the discontinuously synthesised segments become joined by DNA ligase.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "5 Marks Questions" from Molecular Basis of Inheritance→Molecular Basis of Inheritance — all question types→BIOLOGY STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

  1. Name two types of satellite DNA. Mention the basis for such a classification.
  2. Show only diagrammatically the process of transcription in bacteria.
→
Given below is a table showing the genotypes and the phenotypes of blood groups in the human population.
Genotype
Phenotype
W
Y
$I^BI^O$
Z
$I^AI^B$
O
X
O
  1. Identify the genotype Wand X, and the phenotype Y and Z.
  2. Name the pattern of inheritance exhibited by the phenotypes Y and Z in the table.
→
You have studied the story of Pepper moths in England. Had the industries been removed, what impact could it have on the moth population? Discuss.
→
Discuss the role of healthy ecosystem services as a prerequisite for a wide range of economic, environmental and aesthetic goods and services.
OR
Describe the advantages for keeping the ecosystem healthy.
→
Answer the following questions:
Explain the events that occur in a graafian follicle at the time of ovulation and thereafter.
→
What is ecological succession? What is climax community? How is climax community established?
→
Answer the following questions:
Explain the role of ovarian hormones in inducing changes in the uterus during menstrual cycle.
→
Answer the following questions:
Why is banana called a parthenocarpic fruit? Would you call banana a true fruit? Give reason in support of your answer.
→
Compare and contrast the advantages and disadvantages of production of genetically modified crops.
→
Draw a neat diagram of the female reproductive system and label the parts associated with the following.
  1. Production of gamete.
  2. Site of fertilisation.
  3. Site of implantation.
  4. Birth canal.
→