HBSE Class 11 Sample Paper 2027 Biology Marking Scheme

FOR HARYANA CLASS 11 PREPARATION

HBSE Class 11 Sample
Paper 2027 Biology
Marking Scheme
EXAM YEAR TYPE SUBJECT

Haryana Class 11 2027 Answer Key Biology

Notes · Sample Papers · Previous Year Papers · Mock Tests

.
.co s e m

s em l a
a ag
BSEH MARKING SCHEME

(Academic)

CLASS- XI Biology (Model Paper 2026-27) Code: A
o m
m . c
 The answer
. co points given in the marking scheme are not final. sem
s
These emare suggestive and indicative. If the examinee has given gla
g la a
a different, but appropriate answers, then appropriate marks
should be given.

Q. Part Answers Marks Total

No. no. Marks
m
1. --- b) Palmately compound
m .co 1 1

2. --- a) Marginal s e 1 1
l a
3. --- c) 0 ag 1 1

4. --- d) Plasmodesmata and middle lamella 1 1

5. --- c) Alanine 1 1

6. --- d) RuBP 1 1

7. --- b) Succinate dehydrogenase
o m1 1
m 8. .c
m .co --- d) 13%
s em 1 1

s e 9. --- c) Birds g la 1 1
g la a
a 10. --- Solanaceae 1 1

11. --- Inhibition, inhibitor ½+½ 1

12. --- Apical dominance 1 1

m 1 . c
c. o s e m
s em
For more Question Papers, Sample Papers, Notes & Syllabus visit
gl a
Page 1 of 9

BSEH Marking Scheme Class: XI (Academic) Model Paper (2026-27)

13. --- formation of meristems – interfascicular 1 1

cambium and cork cambium from fully

differentiated parenchyma cells.

14. --- The electrical potential difference across the 1 1

resting plasma membrane of a neuron is called

as the resting potential.

15. --- corpus callosum 1 1

16. --- b) Both A and R are true, and R is not the correct 1 1

explanation of A.

17. --- a) Both A and R are true, and R is the correct 1 1

explanation of A.

18. --- c) A is true but R is false. 1 1

19. Root hairs Trichomes 2

These are unicellular. These are multicellular 1

Help absorb water & Help in preventing water 1
minerals loss due to transpiration.

Or

Palisade parenchyma; ½

near to adaxial epidermis ½

Spongy parenchyma; ½

near to abaxial epidermis ½

2
Biology Code: A

For more Question Papers, Sample Papers, Notes & Syllabus visit Page 2 of 9

.
.co s e m

s em l a
Class: XI (Academic) g Model Paper (2026-27)
a BSEH Marking Scheme
a
20. Small specialised roots in some gymnosperms 1 2

which are associated with N2- fixing

cyanobacteria.
m
e.g. Cycas
om
1
. co
. c e m
21.
em Echinodermata ½
l as
l as ½ a
g
ag i) locomotion
2
ii) capture and transport of food ½

iii) respiration ½

22. Selaginella 1
2
Salvinia 1
m
23. PGAL: 3-phosphoglyceraldehyde .co 1
s em
l a
BPGA: 1, 3-bisphosphoglycerate 1
ag Or 2

NADH: four 1

FADH2: one 1

24. i) Sound producing vocal sacs only in males 1
m
om
ii) A copulatory pad on the first digit of the fore
c. o 1 2

. c limbs only in males e m
e m las
las i) high pO2 ag ½
ag
ii) low pCO2 ½

iii) lesser H+ concentration ½ 2

iv) lower temperature ½

3
Biology m Code: A . c
c. o s e m
s em
For more Question Papers, Sample Papers, Notes & Syllabus visit
gl a
Page 3 of 9

BSEH Marking Scheme Class: XI (Academic) Model Paper (2026-27)

Or

It is an auto immune disorder affecting 1

neuromuscular junction,

leading to fatigue, weakening and paralysis of 1

skeletal muscle.

26. Neutral amino acids: Any two

glycine/ alanine/ valine ½+½

Aromatic amino acids: Any two
3
Tyrosine/ phenylalanine/ tryptophan ½+½

Polysaccharides: Any two

Cellulose/ starch/ glycogen/ inulin ½+½

27. i) Golgi apparatus 1

ii) Golgi apparatus 1

iii) Chloroplasts 1

Or 3

Glycocalyx 1

Cell wall 1

Plasma membrane 1

28. In some animals the body is externally and 1
internally divided into segments with a serial
repetition of at least some organs and the
phenomenon is known as metamerism.

4
Biology Code: A

For more Question Papers, Sample Papers, Notes & Syllabus visit Page 4 of 9

.
.co s e m

s em l a
Class: XI (Academic) g Model Paper (2026-27)
a BSEH Marking Scheme
a
Annelida/ Arthropoda/ Chordata Any two

½+½

Porifera/ Cnidaria/ Ctenophora/ Any two 3
m
Platyhelminthes/ Aschelminths/ Mollusca/
om
½+½
. co
. c
Echinodermata e m
e m l as
l as Or ag
ag
Lungs: Air sacs connected to lungs supplement 1

respiration.

Fore limbs: These are modified into wings. 1

Bones: long bones are hollow with air cavities. 1
m
29. A Aleurone layer
m .co ½

B Endosperm s e ½
l a
C Scutellum ag ½
3
D Coleoptile ½

E Plumule ½

F Radicle ½

30. PCT is lined by simple cuboidal brush border
o m1
m .c
m .co epithelium which increases the surface area.
s em
s e PCT helps to maintain the pH and ionic g la
balance
g la a 3
a of the body fluids by selective secretion of 1

hydrogen ions and ammonia into the filtrate

and by absorption of HCO3– from it. 1

5
Biology m Code: A . c
c. o s e m
s em
For more Question Papers, Sample Papers, Notes & Syllabus visit
gl a
Page 5 of 9

BSEH Marking Scheme Class: XI (Academic) Model Paper (2026-27)

31. i) The viruses are non-cellular organisms that are 1

characterised by having an inert crystalline

structure outside the living cell.

ii) Cholera/ typhoid/ tetanus/ citrus canker Any two

½+½

Or

Monera ½ 4

Protista ½

iii) a) Some fungi like mushrooms are edible. Any two,

b) Fungi like yeast are used to make bread and 1 mark

beer. each

c) Some fungi like Penicillium are source of

antibiotics.

32. i) Any four,
Neutrophils/ eosinophils/ basophils/
½ mark
lymphocytes/ monocytes
each

ii) Because of absence of antigens on RBCs in 1

blood group ‘O’.

iii) It can be avoided by administering anti-Rh 1 4

antibodies to the mother immediately after the
delivery of the first child.
Or
Globulins are involved in defense mechanisms
1
of the body.
6
Biology Code: A

For more Question Papers, Sample Papers, Notes & Syllabus visit Page 6 of 9

.
.co s e m

s em l a
Class: XI (Academic) g Model Paper (2026-27)
a BSEH Marking Scheme
a
33. i) Gap 1 phase ½

the cell is metabolically active and continuously ½

grows but does not replicate its DNA.
m
ii) Synthesis phase
om
½
. co
. c period during which DNA synthesis or
The ½ e m
e m l as
l as replication takes place. ag
g
a iii) Gap 2 phase ½

Proteins are synthesised in preparation for ½

mitosis

iv) Mitosis phase ½
5
m
c. o
The M Phase represents the phase when the ½

e m
l as
actual cell division occurs.

v) ag
Quiescent stage ½

Cells in this stage remain metabolically active ½

but no longer proliferate unless called on to do

so

Or m
m c. o 1
.co m
a) i) Metaphase I of meiosis I
m s e
s e ii) Anaphase I of meiosis I g la 1
g la a
a iii) Diplotene of Prophase I 1

7
Biology m Code: A . c
c. o s e m
s em
For more Question Papers, Sample Papers, Notes & Syllabus visit
gl a
Page 7 of 9

BSEH Marking Scheme Class: XI (Academic) Model Paper (2026-27)

b) i) conservation of specific chromosome number 1

of each species is achieved across generations

in sexually reproducing organisms

ii) It also increases the genetic variability in the 1

population of organisms from one generation

to the next which is important for the process

of evolution.

34. C3 Plants C4 Plants

i) Mesophyll Cells Bundle sheath cells 1

ii) PGA OAA 1

iii) Mesophyll Cells Bundle sheath cells 1

iv) 20-25 0C 30-45 0C 1

v) High Negligible 1

Or

a) ½ mark 5
each for

any 6

correct

labels

8
Biology Code: A

For more Question Papers, Sample Papers, Notes & Syllabus visit Page 8 of 9

.
.co s e m

s em l a
Class: XI (Academic) g Model Paper (2026-27)
a BSEH Marking Scheme
a
b) i) Water stress causes the stomata to close hence 1
reducing the CO2 availability.

ii) Water stress makes leaves wilt, thus, reducing 1
the surface area of the leaves.
o m
m . c
35. a)
. co
macrophages and leucocytes ½+½
s e m
m
b)se It helps us in removing dust particles and some l a
la
1
ag
a g of the foreign substances inhaled with the air.

c) Myoglobin content is high in some of the 1

muscles which gives a reddish appearance.
d) i) 6 ½

ii) 24 m ½
c. o
iii) 2
e m ½
l as
ag
iv) 16 ½ 5

Or
Sr. No. Hormone Source Gland Associated disease

i) Insulin Pancreas Diabetes mellitus ½+½

ii) Thyroxine Thyroid Grave’s Disease ½+½
m
m Hypothalamus/ c. ½o + ½
.co
iii) ADH
em
Diabetes insipidus

e m
posterior pituitary

la s
las iv) Corticoids Adrenal Addison’sgdisease
a ½+½

ag Dwarfism/ ½+½
v) Growth hormone Anterior pituitary
Acromegaly

9
Biology m Code: A . c
c. o s e m
s em
For more Question Papers, Sample Papers, Notes & Syllabus visit
gl a
Page 9 of 9