BISE Multan · Class 11 · Biology

BISE Multan · Class 11 · Biology · 2026 · First Annual · Group 1 · Old course

2026 · First Annual

Transcribed from the identified examination paper. Check the board, session and course before use. SchoolOrbit is not affiliated with the issuing board.

Objective

Source code: 6461 · Printed marks: 17 · Time: 20 Minutes

2026 (1st-A)

INTERMEDIATE PART-I (11th Class)

BIOLOGY (OLD COURSE) PAPER-I GROUP-I

6461

OBJECTIVE

Q.No.1

You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that bubble in front of that question number, on bubble sheet. Use marker or pen to fill the bubbles. Cutting or filling two or more bubbles will result in zero mark in that question.

1
The sheep dolly was cloned in:
- (A)
  1996 AD
- (B)
  1997 AD
- (C)
  1986 AD
- (D)
  1999 AD
2
Uracil is present in:
- (A)
  DNA
- (B)
  RNA
- (C)
  Amino acid
- (D)
  Carbohydrate
3
The pH of pepsin is:
- (A)
  2.00
- (B)
  3.00
- (C)
  5.00
- (D)
  5.35
4
In a typical compound microscope the resolution power is:
- (A)
  $1.0 μ m$
- (B)
  300 X
- (C)
  $2.0 μ m$
- (D)
  400 X
5
The capsid of a virus is made up of subunits called:
- (A)
  Capsides
- (B)
  Nucleotides
- (C)
  Genomes
- (D)
  Capsomeres
6
The cell membrane of bacteria is composed of:
- (A)
  Sugar molecules
- (B)
  Polysaccharides
- (C)
  Lipids and proteins
- (D)
  Amino acids
7
The amoeboid stage of slime mold is called:
- (A)
  Plasmodium
- (B)
  Water mold
- (C)
  Water ball
- (D)
  Entamoeba
8
The bioindicators for pollution are:
- (A)
  Rust
- (B)
  Bacteria
- (C)
  Fungi
- (D)
  Lichens
9
The plants with xylem and phloem are called:
- (A)
  Tracheophytes
- (B)
  Bryophytes
- (C)
  Algae
- (D)
  Fungi
10
Loligo, sepia and octopus belong to class:
- (A)
  Bivalvia
- (B)
  Cephalopoda
- (C)
  Oligochaeta
- (D)
  Gastropoda
11
Diploblastic animals belong to division:
- (A)
  Radiata
- (B)
  Bilateria
- (C)
  Acoelomata
- (D)
  Coelomata
12
Magnesium is an important nutrient for green plants as it is an essential component of:
- (A)
  Cell sap
- (B)
  Protein
- (C)
  Chlorophyll
- (D)
  Glucose
13
Dark reaction occurs in:
- (A)
  Stroma
- (B)
  Cytoplasm
- (C)
  Matrix
- (D)
  Mitochondria
14
The partially digested food in cockroach is temporarily stored in:
- (A)
  Stomach
- (B)
  Midgut
- (C)
  Crop
- (D)
  Gizzard
15
Human blood transport gases like:
- (A)
  Only $O_{2}$
- (B)
  Only $C O_{2}$
- (C)
  $O_{2}$ and $C O_{2}$
- (D)
  $H_{2}$ and $O_{2}$
16
Leucaemia is the result of uncontrolled production of:
- (A)
  Leucocytes
- (B)
  Thrombocytes
- (C)
  Erythrocytes
- (D)
  Microcytes
17
In myocardial infarction, the organ affected is:
- (A)
  Lungs
- (B)
  Kidney
- (C)
  Eyes
- (D)
  Heart
25(O)(Obj)(✶)-2026(1st-A)-1000 (MULTAN)

Subjective

Source code: 25(O) · Printed marks: 68 · Time: 2.40 Hours

NOTE: Write same question number and its parts number on answer book, as given in the question paper.
2. Write answers of any eight parts.
3. Write answers of any eight parts.
4. Write answers of any six parts.
NOTE: Write answers of any three questions.

SECTION-I

Q2(i)
How can you differentiate DNA from RNA?
(2 marks)
Q2(ii)
Why are enzymes called as biologically active proteins?
(2 marks)
Q2(iii)
What is Cofactor? Give its importance.
(2 marks)
Q2(iv)
Differentiate between competitive and non-competitive inhibitors.
(2 marks)
Q2(v)
How does the oyster mushroom fulfill its nitrogen and glucose requirements?
(2 marks)
Q2(vi)
What are Yeasts? Give the importance of yeasts.
(2 marks)
Q2(vii)
What is bilateral symmetry? In which phylum is it present?
(2 marks)
Q2(viii)
What do you know about complete metamorphosis?
(2 marks)
Q2(ix)
Write down the two benefits of beneficial insects.
(2 marks)
Q2(x)
The mammals belong to sub-class Eutheria called as “placental mammals”. Why?
(2 marks)
Q2(xi)
What is compensation point?
(2 marks)
Q2(xii)
Discuss the role of cytochromes in respiratory chain.
(2 marks)
Q3(i)
What do you understand from IDM?
(2 marks)
Q3(ii)
Define phyletic lineage.
(2 marks)
Q3(iii)
What are chromoplasts? Write their significances.
(2 marks)
Q3(iv)
Define Cell fractionation.
(2 marks)
Q3(v)
Describe infamous role of Phytophthora infestans in human history.
(2 marks)
Q3(vi)
Write about chlorella, a green alga?
(2 marks)
Q3(vii)
Define Thallus.
(2 marks)
Q3(viii)
What do you know about Giant Amoeba?
(2 marks)
Q3(ix)
What do you know about arthrophytes?
(2 marks)
Q3(x)
Define Overtopping.
(2 marks)
Q3(xi)
Cyanosis is a problem in few new born babies, discuss it.
(2 marks)
Q3(xii)
Differentiate between the pulmonary and systemic circulation.
(2 marks)
Q4(i)
Define Species.
(2 marks)
Q4(ii)
What are Pili? Give their function.
(2 marks)
Q4(iii)
How is tubular digestive system more efficient than sac like digestive system?
(2 marks)
Q4(iv)
What are peristalsis and anti-peristalsis?
(2 marks)
Q4(v)
Name enzyme in human saliva. What is its function?
(2 marks)
Q4(vi)
How is air pumped in and out of trachea of cockroach?
(2 marks)
Q4(vii)
What are Parabronchi? Give their role.
(2 marks)
Q4(viii)
Compare amount of carbon dioxide in arterial and venous blood.
(2 marks)
Q4(ix)
What is role of temperature in oxygen carrying capacity of blood?
(2 marks)

SECTION-II

Q5(a)
Explain Cloning. How it occurs in humans.
(4 marks)
Q5(b)
Discuss influx of $K^{+}$ ions for opening and closing of stomata.
(4 marks)
Q6(a)
Differentiate between Oligosaccharides and Polysaccharides. Support your answer with examples.
(4 marks)
Q6(b)
Write and explain four fungal diseases found in plants, animals or humans.
(4 marks)
Q7(a)
Discuss physical and chemical methods to control of bacteria.
(4 marks)
Q7(b)
Give comparison of Dicot and Monocot.
(4 marks)
Q8(a)
What do you know about lytic cycle of bacteriophage?
(4 marks)
Q8(b)
Write a detailed account of cyclic phosphorylation.
(4 marks)
Q9(a)
Write a detail note on cytoskeleton.
(4 marks)
Q9(b)
Explain the role of oral cavity in digestion.
(4 marks)

Original source references (4)

The original files and numbering are retained. Equivalent files do not repeat the questions above.

Objective · 6461 · Printed marks: 17 · Time: 20 Minutes
Objective · 6463 · Printed marks: 17 · Time: 20 Minutes : same questions, source numbering preserved separately
Objective · 6465 · Printed marks: 17 · Time: 20 Minutes : same questions, source numbering preserved separately
Subjective · 25(O) · Printed marks: 68 · Time: 2.40 Hours