BIOLOGY
LIFE PROCESESS
MULTIPLE CHOICE QUESTIONS
1. An enzyme that secretes by the pancreas to digest protein is (MQP –1)
(A) amylase (B) pepsin
(C) trypsin (D) lipase
2. The correct statement regarding bile juice among the following is, this juice is secreted by the (MQP –2)
(A) stomach and acidifies food.
(B) stomach and alkalises food.
(C) liver and alkalises food.
(D) pancreas and alkalises food.
3. The function of stomata among the following is (MQP –3)
(A) Exchange of gases
(B) Transportation of water and food
(C) Preparation of food
(D) Establishing osmotic pressure
4. An incorrect statement related to the transpiration among the following is; this process (Preparatory-1)
(A) Creates osmotic pressure for the movement of food molecules
(B) Helps in the absorption and movement of salts from the roots
(C) Creates suction force for the movement of water molecules
(D) Balances water level in a plant body
5. A person runs immediately after seeing a snake, later experiences cramps in his leg muscles. Because, in the muscles (Preparatory – 2)
(A) carbon dioxide and ethanol will form
(B) pyruvate converts into lactic acid
(C) glucose is converted to pyruvate
(D) amount of oxygen increases
ONE MARK QUESTIONS
1. What is the importance of xylem tissue in plants? (MQP –1)
2. What is the relationship between the amount of haemoglobin in the blood and the amount of ATP released in the human body? (MQP –2)
3. Double circulation of the blood is essential to maintain constant temperature in mammals.
How? (MQP –3)
4. The respiration rate of aquatic animals is faster than that is found in terrestrial animals.
Why? (MQP –4)
5. Draw the diagram to show the structure of open stomata. (Preparatory – 1)
6. What is Photosynthesis ? (Preparatory – 2)
7. What is the importance of transpiration in plants ? (Preparatory – 2)
TWO MARKS QUESTIONS
1. Name the following.
(i) Structures that prevent the collapsing of air-passage part of trachea in the humans.
(ii) Nitrogenous chemicals that are separated from the blood by the kidney. (MQP –1)
OR
a) In which form the excess glucose is stored in plants and animals?
b) Name the structures of the humans small intestine that absorb digested food.
2. Draw a diagram showing the structure of a nephron. Label glomerulus. (MQP –2)
3. Draw the diagram to show the structure the structure of the nephron and label the part Bowman’s capsule. (MQP –3)
4. The approximate lengths of the small intestine of the animals A and B are given in the below table. Observe the data in the table and answer the question. (MQP –4)
Identify the herbivorous and carnivorous animal among A and B. Support your conclusion.
5. What are the differences between arteries and veins? (Preparatory – 1)
OR
Write the differences between aerobic respiration and anaerobic respiration.
6. Name the enzyme present in saliva. Write its function. (Preparatory – 2)
OR
Name the following:
i) Structures that prevent the collapsing of air passage part of trachea in the human.
ii) Nitrogenous chemicals that are separated from the blood by the kidney.
FOUR MARKS QUESTIONS
1. Draw a diagram showing the schematic sectional view of the human heart. Label the following parts.
(i) Septum (ii) Right atrium (MQP –1)
2. a) What are the functions of the aorta and pulmonary veins? (MQP –2)
b) State the events that occur during the photosynthesis in plants.
OR
a) In the first stage of cellular respiration, the glucose molecule is broken down into which molecule in the cytoplasm? How is this broken molecule breaks down in muscle cells?
b) Write any two differences between xylem and phloem.
3. a) How are inorganic substances transported from the xylem tissue in plants? Explain.
b) Write any four methods used by plants to eliminate waste materials. (MQP –3)
OR
a) Explain the digestion process in the small intestine of humans.
b) What is the main function of alveoli in the human lungs?
4. Draw the diagram showing the structure of the human heart. Label the following parts:
i) Superior vena cava ii) Left ventricle (MQP –4)
5. a) What t is emulsification of fats?
b) Write the events that occur during photosynthesis in plants.
6. Draw the diagram showing the schematic structure of the human heart. (Preparatory – 2)
Label the following parts: i) Septum i) Right atrium
CONTROL AND COORDINATION
MULTIPLE CHOICE QUESTIONS
1. Observe the figure given below. The name of the part ‘X’ and its function is (MQP –1)
(A) Neuron; transmits chemicals as electrical impulses
(B) synapse; transmits electrical signals generated at the axon terminal to the dendrite
(C) Neuron; transmits electrical impulses as chemicals
(D) synapse; transmits chemical signals generated at the axon terminal to the dendrite
2. The plant hormone responsible for phototropism in plants is (MQP –3)
(A) Auxin (B) Cytokinin
(C) Abscisic acid (D) Gibberellin
ONE MARK QUESTIONS
1. Why does the stem of a growing plant bend towards the light? Explain. (MQP –1)
OR
Write any two differences between central nervous system and peripheral nervous system.
2. What is the function of abscisic acid in plants? (MQP –3)
3. What is the function of synapse? (MQP –4)
4. Observe the tropisms of plants expressed in the following figures A and B. What is the difference between the movements of these plants? (Preparatory-1)
TWO MARKS QUESTIONS
1. a) Name the prominent parts of reflex arc. (MQP –2)
b) Which hormones are responsible for sexual maturation in humans?
2. What is reflex arc? In many animal’s reflex arcs have been found an effective way of functioning. Why? (MQP –3)
3. What is geotropism? Name the plant part that is positively geotropic. (MQP –4)
OR
Name the hormones that perform the following functions in humans.
i) Controlling the level of sugar in the blood.
ii) Preparing the body to face the emergency situation.
5. We pull out our foot back when we step on a thorn without realizing. Write the sequence of the events that occur in this process. (Preparatory-1)
6. What is geotropism? Name the plant part that is positively geotropic. (Preparatory-2)
THREE MARKS QUESTIONS
1. Name the hormones that perform the following functions in humans. (MQP –1)
(i) Controlling the sugar level in the blood.
(ii) Prepare the body to deal with emergency situations.
(iii) Controlling the fats, proteins and carbohydrates metabolism.
2. Draw the diagram showing the structure of human brain. Label the following parts.
(i) Cerebrum (ii) Pons (MQP –2)
3. Draw the diagrams to show the structure of human brain. Label the following parts
i) Hypothalamus ii) Pons (MQP –3)
4. In a situation where we withdraw our leg when stepped on thorn unknowingly, (MQP –4)
i) Write the sequences of events that occur to give the response in this situation.
ii) Which part of human nervous system controls this action?
5. Draw the diagram to show the structure of human brain and label the following parts : i) Cerebrum ii)
Hypothalamus. (Preparatory-1)
6. a) Heartbeat becomes faster at the time of anxiety. How does the body prepare to deal this situation ? Explain. (Preparatory-2)
b) Experiencing taste and watering in the mouth automatically occurs by the memory of the food taste. Are both of these responses same ? Justify your answer.
HOW DO ORGANISMS REPRODUCE
MULTIPLE CHOICE QUESTIONS
1. Observe the figure below. The characteristic and function of the structure ‘X’ are respectively (MQP –2)
(A) wall is absent and pollinates.
(B) it has a thick wall and grows into a new rhizopus.
(C) it has a thin wall and grows into a new rhizopus.
(D) it has a thick wall and pollinates.
2. A common bacterial infection that spreads through sexual contact in human beings is (MQP –3)
(A) Gonorrhoea (B) AIDS
(C) Hepatitis B (D) Warts
3. The process of producing new individuals in rhizopus is (MQP –4)
(A) spore formation
(B) fragmentation
(C) budding
(D) regeneration
4. Part of flower that develops into fruit and part of the seed that develops into root respectively are (MQP –4)
(A) Ovary and Plumule
(B) Plumule and radicle
(C) Ovary and radicle
(D) Ovary and ovule
5. Organisms that reproduce sexually are more likely to survive in their environment. Because in sexual reproduction these organisms, (MQP –4)
(A) do not produce any variations.
(B) will not have any errors during DNA replication.
(C) will have the same body structure in all generations.
(D) will have the maximum number of successful variations in the subsequent generations.
6. The process of producing the new progenies in rhizopus is (Preparatory – 1)
(A) spore formation
(B) vegetative propagation
(C) binary fission
(D) regeneration
7. the sequential stages that occur in the sexual reproduction of flowering plants are (Preparatory – 1)
(A) pollination, fertilization, seed, embryo
(B) seed, embryo, fertilization, pollination
(C) embryo, seed, pollination, fertilization
(D) pollination, fertilization, embryo, seed
8. The embryo gets nutrition from the mother's blood with the help of special structure called (Preparatory – 2)
(A) Fallopian tube (B) Ovary
(C) Uterus (D) Placenta
ONE MARK QUESTIONS
1. How is the binary fission in amoeba differs from budding in hydra? (MQP –1)
2. “Is Self-pollination possible in flowers that have only stamens?” Justify your answer. (MQP –3)
3. Is self-pollination possible in flowers that have only stamens? Justify your answer. (MQP –4)
4. A scientist cuts planaria as shown in the figure below. After regeneration how many planaria will remain here? (Preparatory – 2)
FIVE MARKS QUESTIONS
1. a) List the three methods of contraception that are usually followed by human beings.
b) What is the function of the vas deferens and prostate gland in the human male reproductive system?
c) How does the menstrual cycle occur? Explain. (MQP –1)
OR
a) Write any two differences between self and cross pollination.
b) What are the changes that occur in a flower after fertilization?
c) Mention any four advantages of vegetative propagation.
2. a) What is the role of the placenta at the development stage of the embryo in the female uterus?
b) Testes are located outside the abdominal cavity in males. Why? (MQP –2)
c) How is the number of chromosomes reestablished in sexual reproduction? Explain.
OR
a) How are the reproductive processes in hydra and planaria differ?
b) What are the changes that occur in the flower after fertilization?
c) How does a seed grows into future plant?
3. a) How do daughter organisms produced in hydra, spirogyra and amoeba? Explain briefly. (MQP –3)
b) What are the changes that occur in a flower after fertilization?
OR
a) How does a fertilized egg in a female develop into an embryo in the uterus?
How does this embryo get nourishment in the mother’s womb? Explain
b) Explain the important functions of
i) Testis and
ii) Seminal vesicle in male reproductive system in humans.
4. a) What happens if egg does not fertilize in human female reproductive system? Explain briefly.
b) List any four advantages of vegetative propagation. (MQP –4)
c) Write two examples for the organisms that reproduce by binary fission.
OR
a) In women, how does a fertilized egg develop into an embryo in the uterus?
b) Is surgical contraception a better method of contraception than physical contraception? Justify your answer.
c) Write the function of testes in human male reproductive system.
5. a) Explain the process of development of an egg into a foetus in human female reproductive system
b) What are sexually transmitted diseases? Write any two examples. (Preparatory-1)
OR
a) What is asexual reproduction? What are the differences between fragmentation and fission?
b) Mention the advantages of vegetative propagation
6. a) What is the function of the vas deferens and prostate gland in the male reproductive system ? How does the menstrual cycle occur in women ? (Preparatory-2)
b) List the three methods of contraception that human beings usually follow.
OR
a) What is the difference between self and cross pollination ? What are the changes that occur in a flower after fertilization ?
b) Mention any four advantages of vegetative propagation.
HEREDITY
MULTIPLE CHOICE QUESTIONS
1. In a zygote there are 24 pairs of chromosomes. Then the number of chromosomes present in the gametes are (MQP –1)
(A) 24 pairs (B) 48
(C) 6 pairs (D) 24
2. The correct statement/s about gene among the following is/are (MQP –2)
(i) It is an unit of DNA.
(ii) It is the source of information for protein.
(iii) A single gene synthesizes several proteins.
(iv) It functions as an enzyme.
(A) (i) only
(B) (i) and (ii) only
(C) (ii), (iii) and (iv) only
(D) (i), (ii) and (iii) only
3. The generation in which Mendel performed cross pollination is (Preparatory-2)
(A) Parent (B) Ovary
(C) F2 (D) F3
ONE MARK QUESTIONS
1. Observe the table below showing different forms of pea plants. (MQP –1)
2. What is DNA replication? (MQP –2)
3. What is DNA replication? (MQP –3)
4. How is the sex of a male child determined in humans? (Preparatory-1)
THREE MARKS QUESTIONS
1. Explain: (MQP –1)
a) The determination of the height of a plant by genes.
b) The determination of the sex of the male child in humans.
OR
A red flowering pea plant (RR) is crossed with a white flowering pea plant (rr). Show the result of F2 generation with the help of a checker board. Write the phenotypic ratio and the genotypic ratio of the plants obtained in F2 generation.
2. Red flowering tall pea plant (TTRR) is hybridised with white flowering dwarf pea plant (ttrr). Show the result of F2 generation with the help of a checker board and write the ratio of verities of plants. (MQP –2)
OR
Yellow seeds producing pea plant (YY) is hybridised with green seeds producing pea plant (yy). Show the result of F2 generation with the help of a checker board. Write the phenotypic and genotypic ratios of F2 generation.
3. a) Father only determines the sex of a child. Why? (MQP –3)
b) Yellow seed producing pea plant (YY) is crossed with green seed producing plant (yy). Then draw a checker board showing the results obtained in F2 generation.
(OR)
Red flowering tall pea plant (TTRR) is hybridised with white flowering short pea plant (ttrr). Then draw a checker board showing the results obtained in F2 generation.
4. a) A short pea plant (tt) is crossed with a tall pea plant (TT). Express the result obtained in the F2 generation with the help of checkerboard. (MQP –4)
b) How is the baby girl sex will be determined?
OR
Round and yellow seeds (RrYy) producing pea plants are self-pollinated. Express the result obtained in this crossing with the help of a checkerboard. Mention the types of the plants obtained.
5. A pure tall pea plant ( TT ) is crossed with a pure dwarf pea plant ( tt ). Express the result obtained in F2 generation with the help of checker board and mention the ratio of the types of plants. (Preparatory-1)
6. Explain the role of chromosomes of father and mother in the determination of the sex of a child. (Preparatory-2)
OR
A pure tall pea plant (TT) is crossed with a pure short pea plant (tt). Express the result obtained in the F generation with the help of checker board. Write the phenotypic and genotypic ratio of the types of plants obtained in F2 generation.
OUR ENVIRONMENT
THREE MARKS QUESTIONS
1. a) Ozone layer is a boon to the life on the earth. Justify. (MQP –1)
b) The organisms of which trophic level in a food chain are most affected by biological magnification? Why?
2. a) What are biodegradable substances? (MQP –2)
b) Which synthetic chemical is responsible for the depletion of the ozone layer?
c) Write two examples of decomposers.
3. a) Grass → Frog → Snake; If the amount of energy in the first trophic level of this food chain is about 100 J, What is the amount of the energy available for the organism at the third trophic level?
b) If all the wastes we generate are biodegradable, what kind of the effects this would impact on our environment? Discuss. (MQP –3)
4. a) Define the following: (MQP –4)
i) Food chain ii) Biomagnification
b) Mention the function of ozone. Name the chemical responsible for ozone depletion.
5. grass → Grasshopper → Frog → Snake : In this food chain. (Preparatory-1)
i) Which organism has more deposition of harmful chemicals?
ii) Does the energy from the frog return to the grass-hopper? Clarify your answer.
OR
Give reasons :
a) Production of CFC free refrigerators is compulsory.
b) Plastics remain for long period in the environment.
6. a) Define the following: (Preparatory-2)
i) Food chain ii) Biomagnification.
b) Mention the function of ozone layer in the atmosphere. Name the chemical responsible for ozone depletion.
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