TBSE Class 11 Model Question Paper for 2021 Biology

Model Question
Class - XI : Biology : 70 Marks : 2020-2021

Group-A Each Questions Carries 1 marks : 1x 20 = 20
§!ë˛Ü˛ í˛z_Ó˚!ê˛ !ã˛!•´ï˛ ܲÓ˚ 1 x 5 =5
1.Which of the follwing is an acellular organism ?
a) Rhizobium (b) Fungun (c) CORONA Virus (d) Plasmodium
!lˆÏ¡¨Ó˚ ˆÜ˛yl ç#Ó!ê˛ ~ܲ!ê˛ xˆÏܲy£Ï#Î˚ ç#Ó ⁄
ܲä Ó˚y•zˆÏçy!ÓÎ˚yÙ åáä SÈeyܲ åàä ܲˆÏÓ˚yîy ˲y•zÓ˚y§ åâä ≤’yçˆÏÙy!í˛Î˚yÙ
2) Which type of WBC is found in maximum amounts in human blood ?
a) Basiphil (b) Eosinophil (c) Neutrophil (d) Lymphocyte.
ˆÜ˛yl ôÓ˚ˆÏlÓ˚ WBC ÙylÓ Ó˚ˆÏ=˛ §ÓˆÏã˛ˆÏÎ˚ ˆÓ!¢ ˛õ!Ó˚ÙyˆÏî ˛õyGÎ˚y ÎyÎ˚⁄
Ü˛ä ˆÓˆÏ§y!Ê˛° åáä •zG!§ˆÏly!Ê˛° åàä !lí˛zˆÏê˛∆y!Ê˛° åâä !°ˆÏ¡≥˛y§y•zê˛
3) Loweer Km value indicates – (a) Less affinity for substrate (b) more affinity for substrate
(c) enzyme concentration (d) number of active site
Km ~Ó˚ fl∫“ Ùyl !ܲ !lˆÏò≈¢ ܲˆÏÓ˚⁄
åÜ˛ä ˆÎÔàˆÏܲÓ˚ Ü˛Ù ã˛y!•òy åáä ˆÎÔàˆÏܲÓ˚ ˆÓ!¢ ã˛y!•òy åàä í˛zÍˆÏ§ã˛ˆÏܲÓ˚ âlc åâä §!ܲÎ˚ܲ fiÌyˆÏlÓ˚ §Çáƒy–
4) Kreb’s cycle occurs in which cell organelle ? (a) Ribosome (b) Mitochondria
(c) Plastid (d) Lysosome.
ˆÜ˛yl ˆÜ˛y£Ï#Î˚ xAàyl%ˆÏï˛ ˆÜ˛Ó§ã˛Ü˛ §Çà!ë˛ï˛ •Î˚⁄
ܲä Ó˚y•zˆÏÓyˆÏçyÙ åáä Ùy•zˆÏê˛yܲl!í»˛Î˚y åàä ≤’y!fiê˛í˛ åâä °y•zˆÏ§yˆÏçyÙ
5) Colchicin plant belongs to which family ?
a) Liliaceae (b) Asteraceae (c) Brassicaceae (d) Poaceae
ܲ°!§!ã˛l í˛z!qò!ê˛ ˆÜ˛yl í˛z!qòˆÏày¤˛#Ó˚ xhs˝Ë%≈˛=˛ ⁄
ܲä !°!°ˆÏÎ˚§# åáä xƒyfiê˛yˆÏÓ˚§# åàä Óy!§ˆÏܲ§# åâä ˆ˛õyˆÏÎ˚§#
l#ˆÏã˛Ó˚ ≤ß¿à%ˆÏ°yÓ˚ ~ܲ ¢ˆÏ∑‡ÓyˆÏܲƒ í˛z_Ó˚ òyG
6) What is taxon?
ê˛ƒy:l !ܲ⁄
7) What is the name of the largest animal phylum ?
§ÓˆÏã˛ˆÏÎ˚ Óí˛¸ ≤Ãyî# ˛õÓ≈!ê˛Ó˚ lyÙ !ܲ ⁄
8) Give an example of cyanobacteria ?
~ܲ!ê˛ §yÎ˚yˆÏlyÈüÈÓƒyܲ!ê˛!Ó˚Î˚yÓ˚ í˛zòy•Ó˚î òyG–
9) Which cell organelle is called the suicidal bag of cell.
ˆÜ˛yˆÏ£ÏÓ˚ ˆÜ˛yl xAàyl%ˆÏܲ xydâyï˛# Ì!° Ó°y•Î˚⁄

10) In Which phylum of animals choanocyte cells are present ?
ˆÜ˛yl ≤Ãyî# Ó˚yˆÏçƒ ˆÜ˛yÎ˚yˆÏly§y•zê˛ ˆÜ˛y£Ï ˆòáy ÎyÎ˚⁄
11) Give two examples of essential amino acids ?
ò%!ê˛ xï˛ƒyÓ¢ƒÜ˛#Î˚ xƒyÙy•zˆÏly xƒy!§ˆÏí˛Ó˚ í˛zòy•Ó˚î òyG–
12) Which type of sugar is present in DNA?
DNA ~Ó˚ ÙˆÏôƒ ܲ# ôÓ˚ˆÏlÓ˚ ¢Ü≈˛Ó˚y ÌyˆÏܲ⁄
13) What is the value of RQ of glucose (in aerobic respiration) ?
@’%ˆÏܲyˆÏçÓ˚ RQ-~Ó˚ Ùyl Ü˛ï˛ å§Óyï˛ Ÿª§ˆÏlÓ˚ ˆ«˛ˆÏeä⁄
14) Where does glycolysis occurs in a cell ?
@’y•zˆÏܲy°y•z!§ ˆÜ˛yˆÏ£ÏÓ˚ ˆÜ˛yÌyÎ˚ âˆÏê˛⁄
15) What is the full form of RuBP?
RuBP ~Ó˚ §¡õ)î≈ lyÙ !°á–
16) What is interphase ?
•zrê˛yÓ˚ˆÏÊ˛ç ܲ#⁄
17) What is pericardium ?
ˆ˛õ!Ó˚ܲy!í≈˛Î˚yÙ Ü˛yˆÏܲ ӈϰ⁄
18) What is electrocardiograph ?
•zˆÏ°Ü˛ˆÏê˛∆yܲy!í≈˛G@˝ÃyÊ˛ ܲ#⁄
19) Name the hormone which is associated with the rcabsorptio of water in kidney ?
Ó,ˆÏE˛Ó˚ ÙˆÏôƒ çˆÏ°Ó˚ ˛õ%lıˆ¢y£ÏˆÏîÓ˚ §yˆÏÌ Î%=˛ •Ó˚ˆÏÙyl!ê˛Ó˚ lyÙ !ܲ⁄
20) What is the normal systolic Pressure value of human blood ?
Ùyl%ˆÏ£ÏÓ˚ fl∫y˲y!Óܲ !§ˆÏfiê˛y!°Ü˛ Ó˚=˛ã˛y˛õ Ü˛ï˛ ⁄
Section-B ≤Ã!ï˛!ê˛ ≤Èϟ¿Ó˚ ÙylÈüÈ2 2x8=16
Short Answer type questios å§Ç!«˛Æ ≤Èϟ¿y_Ó˚ä
21) Give two difference between archaebacteria & eubacteria.
xy!Ü≈˛Óƒyܲ!ê˛!Ó˚Î˚y G •zí˛zÓƒy!Q!Ó˚Î˚yÓ˚ ÙˆÏôƒ ò%!ê˛ ˛õyÌ≈ܲƒ í˛zˆÏÕ‘á ܲÓ˚–
22) Explain the symbiotic association of lichens.
°y•zˆÏܲˆÏl §Çà!ë˛ï˛ !ÙˆÏÌyç#!Óï˛y Óƒyáƒy ܲÓ˚–
23) Draw the floral diagram of Solanum nigram (makoi) flower.
Solanum nigram åܲyܲÙy!SÈä í˛z!qˆÏòÓ˚ ˛õ%‹õ!ã˛e xAܲl ܲÓ˚–
24) What is plasmodesmata? Write its function.
≤’yçˆÏÙyˆÏí˛çÙyê˛y ܲ#⁄ ~Ó˚ ܲyç !°á–
25) Why C4 plants can do more photosynthesis than C3 plants.
C4 í˛z!qˆÏòÓ˚y C3 í˛z!qò xˆÏ˛õ«˛y ˆÓ!¢ ˛õ!Ó˚ÙyˆÏî §yˆÏ°yܲ§ÇˆÏŸ’£Ï ܲÓ˚ˆÏï˛ ˛õyˆÏÓ˚ ˆÜ˛l⁄

26) What is crossing over ? When does if occur ?
ܲ!§ÇG˲yÓ˚ ܲ#⁄ ~!ê˛ Ü˛ál §Çà!ë˛ï˛ •Î˚–
27) Which nodal tissue is called pacemaker of human hear & why ?
ˆÜ˛yl ˆlyí˛y° ܲ°yˆÏܲ ÙylÓ •,Í!˛õˆÏ[˛Ó˚ ˆ˛õ§ˆÏÙܲyÓ˚ Ó°y •Î˚ ~ÓÇ ˆÜ˛l⁄
28) What is diaphragm ? Write its function.
í˛yÎ˚yÊ˛yÙ Ü˛#⁄ ~Ó˚ ܲyç í˛zˆÏÕ‘á ܲÓ˚–
* OR
Name the hormone which is released form heart & write its function.
* xÌÓy
•,Í!˛õ[˛ ˆÌˆÏܲ !lÈ/§,ï˛ •Ó˚ˆÏÙyˆÏlÓ˚ lyÙ G ܲyç !°á–
Group-C å≤Ã!ï˛!ê˛ ≤Èϟ¿Ó˚ Ùyl 3) 3x8=24
Answer the following questions å!lˆÏ¡¨ í˛zˆÏÕ‘!áï˛ ≤ß¿à%ˆÏ°yÓ˚ í˛z_Ó˚ òyGä
29) Why do brayophyta are called amphibians of the plant kingdom ? Mention the function of hold fast
in brown algae. Why the algae of class Rhodophyceae are red in colour? (1+1+1)
í˛z!qò Ó˚yˆÏçƒ ÓyˆÏÎ˚yÊ˛y•zê˛yˆÏòÓ˚ í˛z˲Î˚ã˛Ó˚ ӈϰ ˆÜ˛l⁄ ÓyòyÙ# ˜¢ÓyˆÏ° ˆ•y”˛Ê˛yˆÏfiê˛Ó˚ ܲyç !°á⁄ Ó˚ˆÏí˛yÊ˛y•z§# ˆ◊!îÓ˚
xhs˝à≈ï˛ ˜¢ÓyˆÏ°Ó˚y °y° •Î˚ ˆÏܲl⁄ 1+1+1
30) Name the phylum of animals where the following structures are found – a) Radula (b) proboscis
“All vertebrates are chordates, but all chordates are not vertebrates”- Why ?
!l¡¨!°!áï˛ xÇ¢à%ˆÏ°y ˆÜ˛yl ˆÜ˛yl ≤Ãyî#˛õˆÏÓ≈ ˆòáy ÎyÎ˚ û ܲä Ó˚ƒyí%˛°y åáä ≤ÈÏÓy!§§
Úڧܲ° ˆÙÓ˚%ò[˛# ≤Ãyî#•z ܲí≈˛yê˛y ˛õÓ≈Ë%˛=˛ñ !ܲv §Ü˛° ܲí≈˛yê˛y ˛õÓ≈Ë%˛=˛ ≤Ãyî#Ó˚y•z ˆÙÓ˚%ò[˛# lÎ˚ÈÛÛ û ˆÜ˛l⁄
31) What is aestivation of flower ? With the help of diagrams show the different types of aestivation in
corolla of flower.
˛õ%‹õ˛õe!Ólƒy§ ܲyˆÏܲ ӈϰ⁄ !ã˛e ≤Ãò¢≈l ܲˆÏÓ˚ !Ó!˲ߨ ≤ÃܲyÓ˚ ò°Ù[˛ˆÏ°Ó˚ ˛õ%‹õ!ÓlƒyˆÏ§Ó˚ ôÓ˚l ˆòáyG–
32) Name one semi-autonomous organelle of cell. Why it is called so? Name of main lipid component
which is present in the cell membrame.
ˆÜ˛yˆÏ£Ï í˛z˛õ!fiÌï˛ ˆÎˆÏܲyl ~ܲ!ê xô≈ÈüÈfl∫!lË≈˛Ó˚ xAàyl%Ó˚ lyÙ !°á– ~ˆÏܲ ~Ó˚)˛õ Ó°y •Î˚ ˆÜ˛l⁄ ˆÜ˛y£Ï˛õò≈yÎ˚ í˛z˛õ!fiÌï˛
≤Ãôyl !°!˛õí˛ í˛z˛õyòyl!ê˛Ó˚ lyÙ !°á–
33) What do you mean by secondary metabolites ? Give two examples of them. Show the structure of
cholestero.
ˆàÔî !Ó˛õyܲçyï˛ Ó›§Ù)• Ó°ˆÏï˛ Ü˛# ˆÓyV˛⁄ ~ˆÏòÓ˚ ò%!ê˛ í˛zòy•Ó˚î òyG– ˆÜ˛yˆÏ°ˆÏfiê˛Ó˚ˆÏ°Ó˚ àë˛l !ã˛e!ê˛ xAܲl ܲÓ˚–
34) Mention the significance of meiosis. What is chiasmata ?
!ÙˆÏÎ˚y!§ˆÏ§Ó˚ ï˛yͲõÎ≈ í˛zˆÏÕ‘á ܲÓ˚– ܲyÎ˚çÙyê˛y ܲyˆÏܲ ӈϰ⁄ 2+1=3
OR,
Describe fluid mosaic model of plasmamembrane with a diagram. 2+1
ˆÜ˛y£Ï˛õò≈yÓ˚ Êœ%˛•zí˛ÈüȈÙyˆÏç•zܲ åï˛Ó˚° ˆÙyˆÏç•zܲä l:y!ê˛ !ã˛e§• Óƒyáƒy ܲÓ˚–

35) What is plycolysis ? Write the sequential reaction of glycolysis in a flow-chart.
@’y•zˆÏܲy°y•z!§§ ܲ#⁄ @’y•zˆÏܲy°y•z!§ˆÏ§ §Çà!ë˛ï˛ !Ó!ܲÎ˚y§Ù)•ˆÏܲ ~ܲ!ê˛ ¢∑ÈüÈ!ã˛ˆÏeÓ˚ §y•yˆÏ΃ ˆòáyG–
36) Which blood group is called universal donor & why ? What do you mean by crythroblastosis
foetalis ?
Ó˚ˆÏ=˛Ó˚ ˆÜ˛yl @˝Ã%˛õˆÏܲ §y!Ó≈ܲòyï˛y ӈϰ ~ÓÇ ˆÜ˛l⁄ ~!Ó˚ˆÏÌyÓœyˆÏfiê˛y!§§ !Ê˛ê˛y!°§ ܲyˆÏܲ ӈϰ⁄
37) Explain the concept of the mechanism of muscle contraction-Draw a labelled diagram of myosin
monomer.
ˆ˛õ¢# §ÇˆÏܲyã˛l ˛õÂô!ï˛!ê˛Ó˚ Ù)° !Ó£ÏÎ˚!ê˛ Óƒyáƒy ܲÓ˚– ÙyˆÏÎ˚y!§§ ÙˆÏlyÙyˆÏÓ˚Ó˚ !ã˛!•´ï˛ !ã˛e xAܲl ܲÓ˚–
38) What is carbaminohaemoglobin ? What do you mean by Tidal volume and vital capacity ?
ܲyÓ≈y!ÙˆÏly!•ˆÏÙyˆÏ@’y!Ól !ܲ ⁄ ≤ÃÓy•# ÓyÎ˚%Ó˚ ˛õ!Ó˚Ùyî ~ÓÇ ÓyÎ˚%ôyÓ˚ܲc Ó°ˆÏï˛ !ܲ ˆÓyV˛⁄
OR
What is second messenger in hormone action ? Briefly describe the second messenger method or cAMP
mediated mechanism of hormonal action.
•Ó˚ˆÏÙyˆÏlÓ˚ ܲyÎ≈˛õÂô!ï˛ˆÏï˛ !mï˛#Î˚ Óyï≈˛yÓ• Ó°ˆÏï˛ Ü˛# ˆÓyV˛⁄ •Ó˚ˆÏÙyˆÏlÓ˚ ܲyÎ≈˛õÂô!ï˛ˆÏï˛ !mï˛#Î˚ Óyï≈˛yÓ• ˛õÂô!ï˛ Óy cAMP
myÓ˚y §Çà!ë˛ï˛ ˛õÂô!ï˛Ó˚ §ÇˆÏ«˛ˆÏ˛õ !ÓÓÓ˚î òyG–
Group-D ≤Ã!ï˛!ê˛ ≤Èϟ¿Ó˚ Ùyl 5 5x2=10
Long answer type questions åÓ˚ã˛lyôÙ#≈ ≤Èϟ¿Ó˚ í˛z_Ó˚ä
39) Explain the mechanism of breathing in human. Mention the names of the factors which are anociated
with oxygen dissociation curve. What is emphysema ?
ÙylÓ ˆòˆÏ• Ÿªy§!ܲÎ˚yÓ˚ ˛õÂô!ï˛ Óƒyáƒy ܲÓ˚– x!:ˆÏçl !í˛ˆÏ§y!§ˆÏÎ˚¢yl ˆ°á!ã˛ˆÏeÓ˚ §yˆÏÌ Î%=˛ Ê˛ƒyQÓ˚à%!°Ó˚ lyÙ !°á⁄
•zÙÊ˛y•z!§Ùy Ó°ˆÏï˛ Ü˛# ˆÓyV˛⁄
OR
Explain the stager of calvin cycle with a flow chart. Write down two difference between cycle & non-
cyclic photophosphorylation. 3+2
~ܲ!ê˛ ¢∑ !ã˛ˆÏeÓ˚ §y•yˆÏ΃ ˆÜ˛°!˲l ã˛Ü˛!ê˛ Óƒyáƒy ܲÓ˚– ã˛Ü˛yܲyÓ˚ G xã˛Ü˛yܲyÓ˚ Ê˛§ˆÏÊ˛yÓ˚#Ë˛ÓˆÏlÓ˚ ÙˆÏôƒ ò%!ê˛˛õyÌ≈ܲƒ !°á–
40) Why lungs are considered as excretory organ ? Explain renin-angiotensin systom in short. What is
slomerulonephritis ? 1+3+1
Ê%˛§Ê%˛§ˆÏܲ ˆÜ˛l ˆÓ˚ã˛l xAà Ó°y •Î˚⁄ §ÇˆÏ«˛ˆÏ˛õ ˆÓ˚!ll xƒy!OGˆÏê˛l!§l ï˛sf!ê˛ Óƒyáƒy ܲÓ˚– ˆ@’yˆÏÙ!Ó˚GˆÏ°yˆÏlÊ˛y•z!ê˛§!ܲ⁄
OR
What is lenticel & how it is associated with plant respiration explain ? Show the main pathways or
ancerobic respiration.What is RQ. 2+2+1
ˆ°!rê˛ˆÏ§° !ܲ ~ÓÇ •z•y !ܲ˲yˆÏÓ í˛z!qˆÏòÓ˚ Ÿª§ˆÏlÓ˚ §yˆÏÌ Î%=˛ÈüÈÓƒyáƒy ܲÓ˚– xÓyï˛ Ÿª§ˆÏlÓ˚ Ù)რ˛õ̧Ù)•ˆÏܲ SȈÏܲÓ˚
§y•yˆÏ΃ ˆòáyƒ– RQ !ܲ⁄