Past Papers Biology 1


Subject: Biology-I

Time Allowed: 15 Minutes

Max Marks: 10

NOTE: Attempt this Paper on this Question Sheet only. Please encircle the correct option. Division of marks is given in front of each question. This Paper will be collected back after expiry of time limit mentioned above.


Part-I Encircle the right answer, cutting and overwriting are not allowed. (10)

Molecules which play the key role in the transfer of genetic information during protein synthesis are ____________


C) Nucleic Acid D) Lipids

2. Separation of homologous chromosomes occurs during ____________,

A) Prophase B) Metaphase

C) Anaphase D) Telophase

3. Genomes of viruses are ____________,


C) Either single stranded or double stranded RNA or DNA

D) all of the above

4. Chromosomes duplicate during the ——-.————— of cell division.

A) G1 phase B) G2 phase

C) G0 phase D) S phase

5. Name the RNA molecules which are used to carry genetic information copied trom DNA?


C) rRNA D) snRNA

6. The enzyme which is used to join the DNA nucleotides is Called ____________,

A) DNA-ligase B) DNA-helicase

C) DNA-plymerase D) Topoisomerase

7. Chitin is the prominent structural molecule present in the cell wall of ____________,

A) Plant B) Animal

C) Bacteria D) Fungi

8. The Protein coat of virus is called as ____________,

(a) nuceid                                            (b) capsid

(c) capsomere                                   (d) Outer envelope

9. The bond between Nucleotides of DNA is ____________,

A) Peptide bond B) Hydrogen bond

C) Phosphodiester bond D) Glycosidic bond

10. Beta pleated sheets are present in which structure of proteins?

A) Tertiary B) Primary

C) Secondary D) Quaternary



Subject: Biology-I

Time Allowed: 2 Hours 45 Minutes

Max Marks: 50



Part-II  Give Short Answers, Each question carries equal marks. (20)

Q#1: What are Plasmids? What is their role in genetic engineering?

Q#2: What are Bacteriophages?

Q#3: How Law of Independent assortment is different from Law of segregation?

Q#4: What are Prions and Viruses?

Q#5: What do you know about crossing over?

Q#6: Give different types of chromosomes on the basis of Centromere.

Q#7: What are amphibious plants? Write down their main characteristics.

Q#8: Differentiate between gene and allele?

Q#9: Define law of thermodynamics with respect to metabolism?

Q#10: Differentiate “autotrophs and heterotrophs”.

Part-III  Give Long Answers, Each question carries equal marks. (30)

Q#3: How Proteins are formed? Explain the Process.

Q#4: Describe the composition of DNA with the help of diagram.

Q#5: Enlist the differences between Prokaryotes and Eukaryotes with examples.

Q#6: Describe the stages of Meiosis with the help of diagram and explain the significance of meiosis in life.