BISE Multan · Class 12 · Biology

BISE Multan · Class 12 · Biology · 2026 · First Annual · Group 2

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: 4462 · Printed marks: 17 · Time: 20 Minutes

OBJECTIVE

Q1(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.
These are the primary structure for eliminating waste products:
- (A)
  Liver
- (B)
  Kidney
- (C)
  Spleen
- (D)
  Both A and B
Q1(2)
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.
Which is stimulus for thigmotropism?
- (A)
  Light
- (B)
  Touch
- (C)
  Chemical
- (D)
  Water
Q1(3)
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.
Which one of these muscles provide power for the upward stroke?
- (A)
  Supra-coracoid muscles
- (B)
  Bicep muscles
- (C)
  Tricep muscles
- (D)
  None of these
Q1(4)
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.
Which one of these hormones induces flowering in Pineapple?
- (A)
  Auxins
- (B)
  Cytokinins
- (C)
  Ethene
- (D)
  All of these
Q1(5)
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.
The one which is not related to others is:
- (A)
  Cretinism
- (B)
  Myxoedema
- (C)
  Exophthalmic goiter
- (D)
  Diabetes mellitus
Q1(6)
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.
The proliferative phase occurs after:
- (A)
  Ovulation
- (B)
  Menstruation
- (C)
  Secretory
- (D)
  None of these
Q1(7)
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.
Cell wall becomes thicker and pitted during:
- (A)
  Cell division
- (B)
  Maturation
- (C)
  Differentiation
- (D)
  Zone of elongation
Q1(8)
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.
How many nucleotides are present in a typical human chromosomal DNA?
- (A)
  $1.4 \times 10^{8}$
- (B)
  $1.5 \times 10^{8}$
- (C)
  140 million
- (D)
  Both A and C
Q1(9)
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.
UGA codon is normally a stop codon but in mitochondria it read as:
- (A)
  Tryptophan
- (B)
  Methionine
- (C)
  Isoleucine
- (D)
  Alanine
Q1(10)
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.
Jacobs syndrome can be represented by:
- (A)
  XO
- (B)
  XXX
- (C)
  XXY
- (D)
  XYY
Q1(11)
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.
The traits Mendel studied were confined to only:
- (A)
  Three chromosomes
- (B)
  Four chromosomes
- (C)
  Five chromosomes
- (D)
  Fourteen chromosomes
Q1(12)
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.
Meristem culture produces plants that are:
- (A)
  Pathogen free
- (B)
  Bacteria free
- (C)
  Virus free
- (D)
  Fungi free
Q1(13)
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.
The position of a gene on the chromosome is called:
- (A)
  Locus
- (B)
  Allele
- (C)
  Phenotype
- (D)
  Genotype
Q1(14)
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.
Archaebacteria can tolerate temperatures up to:
- (A)
  $45^{\circ} C$
- (B)
  $85^{\circ} C$
- (C)
  $100^{\circ} C$
- (D)
  $120^{\circ} C$
Q1(15)
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.
Over grazing may lead to the transformation of a grassland into a:
- (A)
  Savana
- (B)
  Desert
- (C)
  Taiga
- (D)
  Tundra
Q1(16)
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.
Limnetic phytoplankton includes:
- (A)
  Bacteria
- (B)
  Protozoa
- (C)
  Cyanobacteria
- (D)
  Mosses
Q1(17)
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.
Which compound is responsible for lead poisoning, Brain damage and forest decline?
- (A)
  Lead compounds
- (B)
  Oxides of nitrogen
- (C)
  Carbon monoxide
- (D)
  Sulphur dioxide

Subjective

Source code: 28 · Printed marks: 68 · Time: 2.40 Hours

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

SECTION-I

2
Write answers of any eight parts.
Q2(i)
How Homeostasis can be defined?
(2 marks)
Q2(ii)
Compare Hydrophytes with Xerophytes.
(2 marks)
Q2(iii)
Draw Urea Cycle.
(2 marks)
Q2(iv)
What is Tonoplast?
(2 marks)
Q2(v)
How synovial joints allow movements in different directions?
(2 marks)
Q2(vi)
Differentiate between Plantigrade and Digitigrade.
(2 marks)
Q2(vii)
What is Parthenocarpy?
(2 marks)
Q2(viii)
What is the cause of Syphilis? How it affects body?
(2 marks)
Q2(ix)
Differentiate between Phytoplankton and Zooplankton.
(2 marks)
Q2(x)
Where does temperate deciduous forests exist in Pakistan?
(2 marks)
Q2(xi)
What are environmental buffers?
(2 marks)
Q2(xii)
Write harmful effects of Acid rain?
(2 marks)
3
Write answers of any eight parts.
Q3(i)
Give the commercial applications of Auxins.
(2 marks)
Q3(ii)
Define Nociceptors.
(2 marks)
Q3(iii)
Differentiate between cranial and spinal nerves.
(2 marks)
Q3(iv)
Differentiate between Phenotype and Genotype.
(2 marks)
Q3(v)
Define gene linkage. How linked genes assort independently?
(2 marks)
Q3(vi)
Differentiate between Dominance and Epistasis.
(2 marks)
Q3(vii)
What is recombinant DNA?
(2 marks)
Q3(viii)
What is Taq polymerase? Give its applications in polymerase chain reaction.
(2 marks)
Q3(ix)
Define gene therapy and its types.
(2 marks)
Q3(x)
What is ecological niche provide an example.
(2 marks)
Q3(xi)
Differentiate between Ectoparasites and Endoparasites.
(2 marks)
Q3(xii)
What is Synecology? Give an example.
(2 marks)
4
Write answers of any six parts.
Q4(i)
What are Neoblasts?
(2 marks)
Q4(ii)
Define embryonic induction.
(2 marks)
Q4(iii)
Enlist different shapes of chromosomes on the basis of centromere.
(2 marks)
Q4(iv)
Differentiate between heterochromatin and euchromatin.
(2 marks)
Q4(v)
What are Okazaki fragments?
(2 marks)
Q4(vi)
What is mitotic apparatus and write down its function.
(2 marks)
Q4(vii)
Define Bivalent or Tetrad.
(2 marks)
Q4(viii)
Differentiate between Homologous and Analogous organs.
(2 marks)
Q4(ix)
What are Vestigial organs? Give examples?
(2 marks)

SECTION-II

NOTE: Write answers of any three questions.

Q5
(8 marks)
1. (a)
  Write a detailed note on urinary system of man.
  (4 marks)
2. (b)
  What is chromosomal non-disjunction? Explain Down’s syndrome in detail.
  (4 marks)
Q6
(8 marks)
1. (a)
  Describe process of repairment of broken bone.
  (4 marks)
2. (b)
  Write a detail note on food chain and food web with diagram.
  (4 marks)
Q7
(8 marks)
1. (a)
  Define Receptors. Classify them and explain each class.
  (4 marks)
2. (b)
  Discuss Darwin’s theory of natural selection.
  (4 marks)
Q8
(8 marks)
1. (a)
  What is Photoperiodism? How it affects flowering in plants.
  (4 marks)
2. (b)
  What is incomplete dominance? Explain it with examples.
  (4 marks)
Q9
(8 marks)
1. (a)
  Define and explain different types of Meristems.
  (1 + 3 = 4)
2. (b)
  How Transgenic animals are used for making biotechnology products?
  (4 marks)

Original source references (5)

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

Objective · 4462 · Printed marks: 17 · Time: 20 Minutes
Objective · 4464 · Printed marks: 17 · Time: 20 Minutes : same questions, source numbering preserved separately
Objective · 4466 · Printed marks: 17 · Time: 20 Minutes : same questions, source numbering preserved separately
Objective · 4468 · Printed marks: 17 · Time: 20 Minutes : same questions, source numbering preserved separately
Subjective · 28 · Printed marks: 68 · Time: 2.40 Hours