Karnataka 1st PUC Preparatory Exam Question Paper 2026 Biology

FOR KARNATAKA 1ST PUC PREPARATORY EXAM EXAM PREPARATION

Karnataka 1st PUC
Preparatory Exam
2026
Question Paper ·
Biology
EXAM YEAR TYPE

Karnataka 1st PUC Preparatory Exam 2026 Question Paper
SUBJECT

Biology

Notes · Sample Papers · Previous Year Papers · Mock Tests

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GOVERNMENT OF KARNATAKA
DEPARTMENT OF SCHOOL EDUCATION ( PRE UNIVERSITY)
PREPARATORY EXAMINATION

I P. U. C: B i o l o g y ( 36) : 2 0 2 5 - 2 6

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Time: 3 hours Max. Marks: 70

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Instructions:

Thi s quest i onem a
s p a p e r consi st of f our p a t s A, B, C, D, E.
g l
partas are compul sory.
Al l l a
Part-A consists o f I a n d ll a n d P a r t D c o n s i s t s o f V a n d VI .

Tg
a h e a n s w e r s f or P a r t - A wri t t en i n t he f i r st t w o p a g e s o f t he a n s w e r b o o k l e t a r e o n l y c o n s i d e r e d f or
evaluation.

PART-A

I . Sel ect t he correct al t ernat i ve f r o m t he choi ces gi ven bel ow: (15x1=15)

1) Al l t he m e m b e r s of K i n g d o m Prot i st a are
a) Si ngl e-cel l ed prokaryotes b) Si ngl e-cel l ed
o m eukaryotes

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m.
c) Mul t i cel l ul ar eukaryotes d) Mul t i cel l ul ar prokaryotes

2) T a p root develops from
s e
a) P l u m u l e b) Radical
c) Radish d) H e i g h t of t h e p l a n t s

3) Cellular l evel o f o r g a n i s a t i o n is s e e n in
a
a) P o r i f e r a b) C o e l e n t e r a t a
c) A n n e l i d a d) Mollusca

4 ) T h e f i ve k i n g d o m cl assi f i cat i on was proposed by
a) Aristotle b) Linnaeus c) R . H . W h i t t a k e r d) T . 0 . D i e n e r

5) H a e m o g l o b i n i s a t y p e of
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a) Ski n pi gment b) V i t a m i n
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c) R e s p i r a t o r y pigment d) C a r b o h y d r a t e

m s e
e la
6) I n m a n g o t h e m i d d l e . fleshy, edible p a r t o f t h e f r ui t i s

las a) E p i c a r p b) E n d o c a r p
d) E x o c a r p ag
c) M e s O c a r p

7) T h e p e r i o d of cel l c y c l e d u r i n g which synthesis o r repl i cat i on of D N A t a k e s p l a c e i s
a) G o p h a s e b) S phase c) G1 p h a s e d) G 2 p h a s e

8) R i b o s o m e s of e u k a r y o t e s are
a) 8 0 S b) 7 0 S c) 5 0 S d) 3 0 S

9) H e a r t i s p r o t e c t e d by a double wailed membranous bag called

om
a) Pleural membrane b) Peri cardi um.
c) R e n a l c a p s u l e .
. c d) Meninges
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10) What the proper sequence in m i t o s i s
a) P r o p h a s e . Metaphase, Anaphase, Telophase
b) P r o p h a s e , A n a p h a s e , M e t a p h a s e , Telophase
c) M e t a p h a s e , A n a p h a s e , T e l o p h a s e Prophase
d) A n a p h a s e M e t a p h a s e Prophase. Telophase
11) Hormones which helps i n mi l k production
a) F S H b) Prol act i n c) L H d) oxyt oci n
12) P a r t of t h e b r a i n responsible f or h e a r i n g is
a) C e r e b e l l u m b) C e r e b r u m c) Medulla d) H y p o t h a l a m u s
13) Pulmonary veins carries
a) d e o x y g e n a t e d blood b) o x y g e n a t e d blood
c) m i x e d b l o o d d) N o n e of these

1 4 ) W h i c h i s t he l argest Synovi al j oi nt
a) Hi pj oi nt b) E l b o w j oi nt c) K n e e j oi nt s d) S h o u l d e r j oi nt

15) Tetrad i s m a d e u p of
a) T w o h o m o l o g o u s chromosomes, e a c h wi t h t w o c h r o m a t i d s
b) F o u r n o n - h o m o l o g o u s chromatids
c) F o u r n o n - h o m o l o g o u s chromosomes
d) F o u r h o m o l o g o u s chromosomes with four chromatids

I. Fi l l i n t h e blanks by choosing the appropriate word/words from those given below
(12-16, hi bernat i on, i nt erki nesi s, Radi cl e, Et hyl ene, G r o w t h r at e) (1x5=5)

1 6 ) T h e h e a l t h y i ndi vi dual has g r a m s of h a e m o g l o b i n p e r 1 0 O m l of b l o o d
1 7 ) F r o g s t a k e s h e l t e r in d e e p b u r r o w s to get protection from extreme h e a t in s u m m e r s c a l l e d as
18 is t h e s t a g e b e t w e e n meiosis-l and mei osi s- | I .
19) A simple g a s e o u s pl ant g r o w t h regul at or is
20) T h e direct elongation of l e a d s i o t he o r m a t i o n of p r i m a r y root .

PART - B
III. Answer any FIVE of the following questions in 3-5 s e n t e n c e s each, wherever
applicable 5 2=10

2 1 ) Expl ai n t he sexual d i m o r p h i s m exhi bi t ed i n f rog
22) Distinguish between Amminotelism and Ureotilism
23) Def i ne: a) Di f f erent i at i on b) Dedi f f erent i at i on.
2 4 ) Cl assi f y bact eri a b a s e d o n t hei r s h a p e
2 5 ) Di f f erent i at e b e t w e e n o p e n a n d cl osed vascul ar
bundles
26) Wri t e t he par t i al pressures of o x y g e n a n d carbon di oxi de i n al veol i and deoxygenated bl ood
27) Def i ne t hermoci dophi l es a n d hal ophi l es

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PART-C

I V. A n s w e r a n y F I V E of t he f ol l owi ng questions i n 4 0 -80 s e n t e n c e s each, w h e r e v e r
applicable (5X3=15)
2 8 ) E x p l a i n a n y t hree t y p e s of pl acent at i on.
2 9 ) W r i t e t he rul es of b i n o m i a l n o m e n c l a t u r e wi t h e x a m p l e of o n e sci ent i f i c name
30) D e f i n e a) s y n a p s i s b) bi val ent c) c h a i s m a t a
31) W h a t are t he di f f erent ki nd of p i g m e n t s i nvol ved i n p h o t o s y n t h e s i s

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3 2 ) Expl ai n t he st ruct ure of Mi t ochondri a
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em di sorders of ci rcul at ory s y s t e m
3 3 ) Wri t e t he s c h e m a t i c represent at i on of Gl ycol ysi s.

s
34) Wri t e a n y t hree
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35) Differentiate b tween hepatic portal system and renal portal system

a g PART-D
V. A n s w e r a n y F O U R of the following questions in 2 0 0 - 2 5 0 words each wherever applicable:

(4X5=20)
36) Expl ai n t he st ruct ure of T . S of Di cot Root .
3 7 ) a) E x p l a i n cel l t h e o r y (2M)
b ) P o w e r h o u s e of t h e cel l
(1M)
c) Sui ci dal b a g of cel l
(1M)
d) W h i c h cel l organel l e
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c. o
i s present i n bot h prokayot es a n d eukaryot es (1M)
38) Draw a labeled diagram of p l a n t cel l .

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39) Mention the phylum in w h i c h f o l l o w i n g
as
structures

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a) P a r a p o d i a b) C o m b p l a t e s c) F l a m e cel l s d) M a l p i g h i a n tubules e) R a d u l a
4 0 ) Expl ai n m e c h a n i s m of breat hi ng
41) Explain schematic representation of k r e b ’ s cycle

42) a) M o s t a b u n d a n t chemical i n t h e l i vi ng organisms
b) M o s t a b u n d a n t prot ei n in t h e w h o l e b i o s p h e r e
c) M o s t a b u n d a n t protein in t h e a n i m a l kingdom
d) S t o r a g e f o r m of c a r b o h y d r a t e in a n i m a l s
e) E n e r g y s o u r c e of c a r b o h y d r a t e s i n pl ant s

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4 3 ) W r i t e t h e sal i ent features of G y m n o s p e r m s
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s em
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la a (5x1=5)
VI . Answer a n y o n e of the following questions in a b o u t 200-250 words each wherever
applicable

44) Draw a neat labeled diagram of Neuron
45) Explain Fluid mosaic model

4 6 ) Expl ai n Metaphase wi t h n e a t l abel ed diagram

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