CBSE Class XI : Biology
Exam Paper (Bihar)
- (i). All Question are compulsory.
- (ii). There is No negative marking for any wrong
- (iii). Questions are in two sections.
SECTION–I (OBJECTIVE QUESTIONS)
1. Who proposed the term protista for unicellular
(a) Lister (b) Posteur (c) Hacckel (d) Koch
2. Organism having characteristic of both plant and
(a) Paramecium (b) Euglena (c) Mycoplasma (d) Bacteria
3. Contractile vacuole of Protozoa takes parts in
(a) Reproduction (b) Locomotion (c) Digestion (d)
4. Fruit of Mustard is
(a) Siliqua (b) Cypsela (c) Nut (d) Achene
5. Corn is modification of
(a) Raoot (b) Bud (c) Stem (d) Leaf
6. The term Nucleus was coined by
(a) Brown (b) Fontana (c) Bowman (d) Golgi
7. Cilia and flagella are composed of
(a) Microtubules (b) Microfilaments
(c) Microfibrils (d) Microvilli
8. Movement of Water through semipermeale membrane
(a) Wall pressure (b) Suction pressure
(C) Osmotic pressure (d) Turger pressure.
9. Weight of human liver is
(a) 6.0 Kg. (b) 5.0 Kg. (c) 3 : 0 Kg. (d) 1.5 Kg
10. Amount of Saliva secreted per day is–
(a) 330 ml (b) 550 ml (c) 750 ml (d) 1100ml
Instructions : Q. No. 11 to 15 In the following questions there are
two statements. Statement- I follows Statements-II. You have to go through these
statements and mark your answer from the given questions.
(a). If both the statement are true & statement II is the correct explanation
of Statement – I.
(b). If both the statement are true & statement- II is not correct explanation
of statement – I.
(c). If statement – I is true and statement – II is false
(d). If statement – I is false & statement – II is true.
11. Statement I–When the ambient temp is high and
soils contain excess of water, the plants tend to loose water, in the form of
droplets from lenticels.
Statement II– Root pressure regulate the rate of loss of water from
12. Statement I–Exchange of genetic material occurs
Statement II–There is a charisma formation in meiosis.
13. Statement I–Frequency of crossing over in a
chromosome is directly proportional to the distance between two genes.
Statement II–Crossing over at point on a chromosome discourage the
occurrence of another crossing over in the vicinity.
14. Statement I– Bacteria parasitize animals and cause disease.
Statement II–Therefore, plants do not have bacterial disease.
15. Statement I–The Color of flowers in Bougainvillea is due to the
Statement II–The flowers of Bougainvillea are largest among the
Instructions : Question No. 16 to 18 In the following question there
may be more than one correct answer. You have to mark all the correct options.
16. Which of the following are primary sex organs.
(a) Scrotum (b) Vagina (c) Testis (d) Ovary
Answer: (c, d)
17. Factors important in the formation of new species are
(a) Isolation (b) Competition (c) Mutation (d)Continuous
Answer: (c, d)
18. Immune response are carried out by –
(a) Lymphocytes (b) Adipocytes (c) Immunolgolobuline (d)
Answer: (a, c)
Instructions : Question No. 19 to 22 In the following questions there
are two columns the columns – I contains 4 questions, you have to watch the
||(a) Copulation chamber in female
||(b) Site of implantation of Zygote
|21- Fellopian tube
||(c) Cessation of menstrual cycle.
||(d) Site of fertibization in female.
Answer: 19. (b) 20. (c) 21. (d) 22. (a)
Pollination is defined as the process of transfer of pollen grains from an
anther to the stigma of the same flower or of different flower. If the pollen
grains are transferred from an anther to the stigma of the same flower, the
process is called self-pollinatioin or autogamy. If these are transferred to the
stigma of a flower on different plant it is called as cross-pollination or
allogamy For self polinatioin, bisexuallity, homogamy & clestogamy adoption are
found. In cleistogamous
flower, the anthers mature and burst liberating their pollen grainsin a closed
flower. The contrivances for cross pollination are dicliny, self-sterlity,
dichogamy, heterostyly and herkogamy.
The agenices which transfer pollen: grains from anther to stigma are as
follows. wind (Anemophily), water (Hydrophily), insects (entomophily), birds (ornithophily)
and bats (cheiropterophily)
23. In Salvia, pollinating agents are insects, known as
(a) Anemophily (b) Hydrophilly (c) Zoophily (d) Entomophily
24. Some flowers which never open are called as :
(a) Protrandrous (b) Unisexual (c) Cleistogamous (c) Chromogamous
25. The transfer of pollen grains from anther to stigma
is known as
(a) dichogamy (b) fertilization (c) Syngamy (d) Pollination
SECTION-II (NON-OBJECTIVE QUESTIONS)
1- Describe the various forms of bacteria.
2- How would you distinguish monocots from dicots.
3- Differentiate between tap root & advetitiious root
4- What is primary meristem.
5- what is xylem.
6- What are radial bundles.
7- Define albuminous cell.
8- What is open Vascular bundle
9- Name the tissue which connect musscle to a bone
10- Write notes on a locomotion in Earthworm.
11- Describe the function of Nucleus.
Instruction : Q. No. 12-15 are of Long Answer Type Question. Every
question are of 5 marks each.
12- Describe differences between Prokaryotic & Eukaryotic Cells.
Describe difference between white and red muscle.
13- Write a note on Microfilaments.
14- Describe prophase of meiosis.
15- Write a note on phtosynthetic pigments.
Write a note on micro tubules.