TS 10th Class Biology Model Paper Set 2 with Solutions

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Students must rely on TS 10th Class Biology Model Papers Set 2 to gauge their understanding of exam patterns.

TS 10th Class Biology Model Paper Set 2 with Solutions

Time: 1:30 hours.
Max. Marks: 40

Instructions:

  1. Read the question paper carefully and understand.
  2. Answer the questions under Part – A in the answer sheet provided.
  3. Part – A contains three sections: section – I, II, and III.
  4. There is an internal choice to the questions under section – III.
  5. Part-B Answers should be written in the given brackets and attach to the Part – A answer sheet.
  6. Write the answers following the instructions given in each section.

Part – A (Marks 30)
Section-I (3 x 2 = 6 M)

Instructions:

  • This section contains 3 very short answer questions.
  • Answer ALL the questions.
  • Write answer to each question in 3 to 4 sentences.
  • Each question carries 2 marks.

Question 1.
What is RUBP?
Answer:
RUBP is the intermediary substance fortìed in the dark reaction. Ribulose 1,5 Bisphosphate is the full form of RUBP.

Question 2.
How does respiration takes place in plants where roots are present in wet places?
Answer:
The plants which have their roots in very wet places have much larger air spaces, connect the stems with the roots, making diffusion from upper parts.

TS 10th Class Biology Model Paper Set 2 with Solutions

Question 3.
What are the factors that transpiration depends on?
Answer:
Several factors such as temperature, humidity of wind, velocity, soil water content etc., determine the opening and closing of stomata and the rate of transpiration.

Section – II (3 x 3 = 9 M)

Instructions:

  • This section contains 3 short answer questions.
  • Answer ALL the questions.
  • Write answer to each question in 5 to 6 sentences.
  • Each question carries 3 marks.

Question 4.
Write a note on ‘feedback mechanism’.
Answer:

  1. The timing and the amount of hormones released.by various glands are controlled by the feedback mechanism which is in built in our body.
  2. The excess deficiency of hormones have harmful effect on our body. For example, the deficiency of insulin results in a disease called diabetes, whereas excess of insulin in the body can lead to coma.
  3. For example, if the sugar level in the blood rises too much, they are detected by the cells of pancreas which respond by producing and secreting more insulin into blood. And as the blood sugar falls to a certain level, the secretion of insulin is reduced automatically.

Question 5.
What are the differences between monohybrid and dihybrid cross?
Answer:

Monohybrid cross Dihybrid cross
1) In monohybrid cross only one pair of contrasting characters are taken into consideration. 1) In dihybrid cross two pairs of contrasting characters are taken into considerations.
2) Phenotypic ratio of F2 generation individuals is 3: 1. 2) Phenotypic ratio of F2 generation individuals is 9 : 3 : 3 :1.
3) In this cross the genotypic ratio of F2, generation individuals is 1: 2:1. 3) In this cross the genotypic ratio of F2 generation individuals is 1: 2 : 2: 4: 1: 2: 1: 2: 1.

Question 6.
Why is scarcity of water there in our country in spite of good monsoon?
Answer:
It has taken place due to the following reasons.

  1. Failure to sustain water availability underground which has resulted largely from the loss of vegetation cover.
  2. Diversion for high water-demanding crops.
  3. Pollution from industrial effluents and urban wastes.

Section – III (3 x 5 = 15 M)

Instructions:

  • This section contains 3 essay-type questions.
  • Answer ALL the questions.
  • There is an internal choice for each question.
  • Write answer to each question in 8 to 10 sentences.
  • Each question carries 5 marks.

Question 7.
Describe what disaster occurs on Earth, if photosynthesis life process stops.
(OR)
What is Lymph? What is the importance of lymphatic system in man?
Answer:

  1. If photosynthesis by plants stops, food will not be available to all other living organisms. Because all these organisms cannot prepare their own food material. Hence heterotrophs dies due to lack of food.
  2. Carbon dioxide is required for the process of photosynthesis by plants.
  3. If it stops the concentration of CO2 increases iñ the air that leads to increase in the temperatures of the Earth.
  4. If the temperature increases it causes global warming which causes melting of ice.
  5. This results in increase in sea levels and water inundates the low-lying areas near the sea coast. So all the low-lying areas drown leading to the death of many organisms.
  6. Photosynthesis releases oxygen into atmosphere. If photosynthesis does not occur the oxygen may not be available for the living organisms. This leads to death of living organisms.

(OR)

  1. In Latin Lymphs means water.
  2. Lymph is the substance that contains blood without solid particles. Tissue fluid is the substance which contains lymph present in the tissues.
  3. Lymph is the vital link between blood and tissues by which essential substances pass from blood to cells and excretory products from cells to blood.
  4. The lymphatic system is a parallel system to various system which collects tissue fluid from tissues and transports it to the venous system.
  5. The muscles which are attached to the skeleton (skeletal muscles) act as pumps when they contract and help in pushing the lymph flowing in lymphatic vessels and the blood flowing in veins towards the heart.
  6. The valves that are present in the lymphatic vessels and veins stop the reverse flow of blood.

TS 10th Class Biology Model Paper Set 2 with Solutions

Question 8.
Explain the formation of fruits and seeds in plants.
(OR)
What are the advantages of artificial vegetative propagation?
Answer:

  1. After fertilization, the fertilized egg present in the ovule divides several times to form embryo.
  2. Mean while, the wall of the ovules becomes hard and they develop into seeds.
  3. Along these developments, the wall of the ovary also starts to swell.
  4. As a result of which ovary develops into fruit with seeds inside it.
  5. The other parts of flowers like petals, sepals stamens, stigma, and style dry up and fall off.
  6. The seed is the reproductive unit of the plant.

(OR)

  1. The new plant produced by artificial propagation will be exactly like the parent plants. Any desirable features of the parent plant will be replicated in the new plant.
  2. The fruit trees grow from cutting and grafting start bear fruits much earlier only after a few growing seasons.
  3. Many plants can be grown from just one parent plant by artificial propagation.
  4. We can also get seedless plants by vegetative propagation.
  5. The plants grown in this method seed less attention in their early years than the plants grown from seeds.
  6. Rare hybrid plants (ornamental plants) with attractive flowers and leaves can be produced in large numbers.
  7. It is very useful method of reproduction in plants that rarely produce flowers.

Question 9.
What happens if there is no epiglottis in human beings?
(OR)
How do you understand the interdependency of animals and plants? How do you appreciate that?
Answer:

  1. From the pharynx, there are two passageways, one to the lungs and other to stomach by oesophagus.
  2. Air goes into the windpipe and food goes into food pipe.
  3. A flap-like valve, the epiglottis protects the windpipe from asserting entry of food.
  4. The epiglottis is the valve partly closed when we swallow food and it opens more widely when we take breath and air enters the lungs.
  5. If epiglottis is absent then both air and food passes through pharynx at a time and cause chocking.

(OR)

  1. In nature, all plants and animals are always interdependent on each other.
  2. Plants synthesize food for all the animals. Hence they are the “Universal food providers”.
  3. Herbivores depends on plants for obtaining food. They become food for secondary and tertiary consumers. Hence, carnivores are indirectly dependent on plants.
  4. Plants provide food, shelter, and protection to animals. In turn, they get. nutrients and pollination from the organisms.
  5. Their interdependence brings the sustainable balance in the ecosystem. This relationship is really appreciable.

Part – B (Marks 10)

Instructions:

  • Write the answers to the questions under Part – B on the question paper It self and attach it to the answer book of Part – A.
  • Each question carries 1 mark
  • Marks will not be awarded in any case of overwriting. rewritten or erased answers.
  • Write the capital letter (A / B / C / D) showing the correct answer for the following questions in the brackets provided against them.

Question 1.
Fill the following flow chart with correct organs A & B. ( )
TS 10th Class Biology Model Paper Set 2 with Solutions 1
A) Pyloric stomach, Pancreas
B) Large intestine, Oesophagus
C) Cardiac stomach, Pancreas
D) Large Intestine, Pancreas
Answer:
D) Large Intestine, Pancreas

Question 2.
The energy released in respiration is obtained from ( )
A) Synthesis of proteins
B) Synthesis of carbohydrates
C) Cell division
D) Oxidation of glucose
Answer:
D) Oxidation of glucose

TS 10th Class Biology Model Paper Set 2 with Solutions

Question 3.
Observe the given apparatus and write the name of the experiment. ( )
TS 10th Class Biology Model Paper Set 2 with Solutions 2
A) Photosynthesis
B) Mechanism of Respiration
C) Mechanism of anaerobic respiration
D) O2, Heat
Answer:
C) Mechanism of anaerobic respiration

Question 4.

List-1 List-2
1. Contraction of auricles a) 0.11-0.14 sec
2. Contraction of ventricles b) 0.8 sec
3. Cardiac cycle c) 0.27- 0.35 sec

A) 1 – a, 2 – b, 3 – c
B) 1 – a, 2 – c, 3 – b
C) 1 -c, 2 – a, 3 – b
D) 1 – b, 2 – a, 3 – c
Answer:
D) 1 – b, 2 – a, 3 – c

Question 5.
Read the contents of the urine as per the information given in table ( )

Glucose 65 mg/dl 50-80
Chlorides 128 m.mol/L 120-130
Urea 35 gm/day 20-30

The volume of urea per day present in the urine
A) 20 – 30 gm
B) 20-30 mg
C) 50-80 gm
D) 20-30 m.mol/L
Answer:
A) 20 – 30 gm

Question 6.
From Hevea braziliensis ……………….. (i) and …………………… (ii) from biodiesel will be extracted. ( )
A) (i) – Latex (ii) – Resin
B) (i) – Resin (ii) – Cinchona
C) (i) – Rubber (ii) – Jatropha
D) (i) – Jatropa (ii) – Latex
Answer:
C) (i) – Rubber (ii) – Jatropha

Question 7.
a) Synthesis of waste products in plants is very slow. ( )
b) Plants do not have specific excretory organs.
A) both a and b are true
B) a is true, b is false
C) b is true, a is false
D) both a and b are false.
Answer:
A) both a and b are true

Question 8.
The system that can changes both inside and outside the body ( )
A) Digestive system
B) Endocrine system
C) Nervous system
D) Circulatory system
Answer:
C) Nervous system

Question 9.
External fertilization is seen in ( )
A) Fish and snakes
B) Crocodiles and lizards
C) Man
D) Frogs and fish
Answer:
D) Frogs and fish

TS 10th Class Biology Model Paper Set 2 with Solutions

Question 10.
The cells in embryo sac are ( )
i) Antipodals
ii) Synergids
iii) Polar nuclei
iv) Female gametophyte
A) iv only
B) iii, iv only
C) i, ii only
D) All
Answer:
D) All

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