Karnataka 1st PUC Model Question Paper 2027 for Biology (Paper 1)

FOR KARNATAKA CLASS 11 PREPARATION

Karnataka 1st PUC
Model Question Paper
2027 for Biology (Paper
1)
EXAM YEAR TYPE SUBJECT

Karnataka Class 11 2027 Sample Paper Biology

Notes · Sample Papers · Previous Year Papers · Mock Tests

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DEPARTMENT OF SCHOOL EDUCATION (PRE-UNIVERSITY)
MODEL QUESTION PAPER -1

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I PUC

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BIOLOGY (36)

TIME: 3 HOURS . e
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[TOTAL QUESTIONS: 44] MAX MARKS: 70

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a g Question paper consists of four parts A, B, C D and E.
General Instructions
 This
 Part A consists of I and II and Part D consists of two parts, section V and VI.
 All the parts are compulsory.
 The answers for Part A written in the first two pages of the answer booklet are only considered
for evaluation.
 Part E consists of questions for visually challenged students only.

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PART - A

em and select the correct option using codes provided
I. Select the correct alternative from the choices given below. 1 × 15= 15

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1. Match Column I and II for housefly classification
below:
Column I Column a II
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A) Family i. Diptera
B) Order ii. Arthropoda
C) Class iii. Muscidae
D) Phylum iv. Insecta

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a) A-i, B-ii, C-i, D-iii b) A-iv, B-iii, C-ii, D-i

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c. 2.o Which of the following statements regarding cyanobacteria is false? sem
c) A-iii, B-ii, C-iv, D-i d) A-iii, B-i, C-iv, D-ii

em a) Also referred as blue green algae. b) Are chemosyntheticaautotrophs.
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c) Have chlorophyll a similar to green plants. d) Form blooms in polluted
3. Which one of the following is false?
a) Gametophytes are multicellular, tiny, and photosynthetic thallus.
b) Pro-thallus is another name for sporophyte.
c) Gametophyte is the predominant phase in mosses.
d) Strobili, a distinctive cone-like structure, are present in Equisetum and Selaginella.

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4. An egg laying mammal is
a) Didelphys b) Macaca c) Ornithorhynchus d) Macropus
5. Some vascular bundles are described as open because these
a) Are surrounded by pericycle but no endodermis.
b) Are capable of producing secondary xylem and phloem.
c) Possess conjunctive tissue between xylem and phloem.
d) Are not surrounded by pericycle.
6. Statement 1: Polar molecules cannot pass through the nonpolar lipid layer.
Statement 2: Polar molecules require carrier proteins to facilitate their transport.
a) Both Statement 1 and Statement 2 are true. b) Statement 1 is true and Statement 2 is false.
c) Statement 1 is false and Statement 2 is true. d) Both Statement 1 and Statement 2 are false.
7. Algae have a cell wall composed of
a) Cellulose, pectin, galactans, mannans
b) Cellulose, galactans, mannans, calcium carbonate
c) Hemicellulose, cellulose, pectin, mannans
d) Hemicellulose, cellulose, pectin, galactans
8. Find out the wrongly matched pair:
a) Primary metabolite – Fatty acid b) Secondary metabolite – Concanavalin
c) Protein – GLUT – 4 d) Heteropolymer – Cellulose
9. In ‘Kranz’anatomy, the bundle sheath cells have
a) Thin walls, many intercellular spaces and no chloroplasts
b) Thick walls, no intercellular spaces and large number of chloroplasts
c) Thin walls, no intercellular spaces and several chloroplasts
d) Thick walls, many intercellular spaces and few chloroplasts
10. Each steps of TCA cycle is labelled from A – F, which among these is the substrate level
phosphorylation?

a) A b) C c) D d) E

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s 11. Foolish seedling disease in rice seedlings is caused by
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a) Penicillium notatum b) Gibberella fujikuroi c) Aspergillus niger d) Neurospora crassa
12. The duration of cardiac cycle is
a) 0.8 sec b) 8.0 sec c) 0.8 millisecond d) 8.0 millisecond
13. Pectoral girdle constitute
a) Scapula and clavicle b) Radius and ulna c) Ilium and ischium d) Maxilla and mandible

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14. Which is the major coordinating centre for sensory and motor signalling?
a)Thalamus
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b) Amygdala c) Hippocampus d) Pons
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15. Select the answer which

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g - Thyroxine - Lack of iodine in diet results in goitre
function or deficiency

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a) Thyroid
b) Corpus luteum -Testosterone - Stimulates spermatogenesis
c) Anterior pituitary – Oxytocin - Stimulates uterus contraction during child birth
d) Posterior pituitary – Growth hormone – Over secretion stimulates abnormal growth
II. Fill in the blanks by choosing the appropriate word/words from those given in the bracket.
1×5=5

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(Micturition reflex, Plasticity, Ribosome, Endodermis, Systema Naturae, Solanum nigrum)

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16. An example for binomial nomenclature is _____.

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a in eukaryotic cell.
18. _______ is the only membrane less celllorganelle
17. The inner most layer of cortex is called ________

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19. ___________ is the ability of plants to follow different pathways in response to environment to form
different kinds of structure.
20. The neural mechanism causing release of urine is called __________.
PART - B
III. Answer any FIVE of the following questions in 3-5 sentences each wherever applicable:

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2 × 5 = 10

omDifferentiate between polyps and medusae.
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21. Explain the heterosporous nature of gymnosperms.

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24. Name the four endomembrane organelles
25. Write the key events of Anaphase I of Meiosis I.
26. Abscisic acid is called as stress hormone. Give reason.
27. Give the graphical representation of oxygen dissociation curve.

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PART - C
IV. Answer any FIVE of the following questions in about 40-80 words each wherever
applicable: 3 × 5 = 15
28. Explain the sexual cycle of fungi.
29. Observe the chart showing divisions of algae and their characteristics given below.
Identify A, B, and C.

Classes Common Name Major Pigments Stored Food Cell Wall
Starch
Chlorophyceae Green algae Chlorophyll a,b A
Mannitol
Phaeophyceae Brown algae B Cellulose and Algin
Laminarin
Chlorophyll a,d Cellulose, Pectin and
Rhodophyceae Red algae C
phycoerythrin Polysulphate esters

30. Draw a neat labelled diagram of digestive system of frog with any 6 labelling.
31. Enumerate the significance of mitosis.
32. Explain the physiological effects of auxins.
33. Explain the role of diaphragm and rib cage in the breathing process.
34. Explain the process of chemical synapse during transmission of nerve impulse.
PART – D
V. Answer any FOUR of the following questions in about 200-250 words each wherever
applicable. 5 × 4 = 20
35. Assign the following organs of animals into their respective phyla.
a) Malpighian tubules b) Radula c) Parapodia d) Comb plates e) Proboscis
36. What is aestivation? Explain any four types of aestivation with an example for each.
37. Draw a neat labelled diagram of animal cell and label any 5 parts.
38. Explain the Z scheme of light reaction.
39. List the complexes that are involved in electron transport system of inner mitochondrial membrane
along with their names.
40. Explain the regulation of kidney function.
41. Define the following disorders of human skeletal system:
a) Myasthenia gravis b) Muscular dystrophy c) Tetany d) Arthritis d) Gout

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VI. Answer any ONE of the following questions in about 200-250 words each wherever
applicable. 5×1=5
42. a) If 100 moles of product is formed in 20 seconds, calculate the rate of the chemical reaction. 2
b) Analyze the below graph and answer

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i) Is it an exothermic or endothermic reaction? How? 2
ii) What does A and B indicate? 1
43. Answer the following questions about the section of human heart given below.
a) Label the parts marked 1 & 3. What is special about these? 2
b) Label the parts marked 4 & 5. What is the common dividing wall between them called? 2

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c) Why is labelled part 6 comparatively so thicker? 1

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44. Gastro intestinal tract secretes four major hormones.
a) What type of hormones are they? 1
b) Explain the role of these hormones. 4

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PART - E

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omThe number of substrate level phosphorylations in one turn of citric acid cycle . is
(For visually challenged students only)

c. 10. e m
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a 42. To analyze the chemical composition of a living tissue, the tissueaisgeither dissolved and filtered or
b) One c) Two

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43. Explain the process of initiation and conduction of heart beat in humans.

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