TS 10th Class Biology Question Paper June 2023

Students must rely on TS 10th Class Biology Model Papers TS 10th Class Biology Model Paper June 2023 to gauge their understanding of exam patterns.

TS 10th Class Biology Question Paper June 2023

Parts – A and B

Time : 1:30 hrs.
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. Part – B Answers should be written in the given brackets and attach to the Part – A answer sheet.
5. Write the answers by following the instructions given in the each section.

Part – A
Section – I (3 × 2 = 6 M)

Time: 1 Hour 15 min.
Marks: 30

Instructions :
i) This section contains 3 very short answer questions.
ii) Answer ALL the questions.
iii) Write the answers in 3 – 4 sentences.
iv) Each question carries 2 marks.

Question 1.
Write two chemicals used to conduct anaerobic respiration experiment.
Answer:
The chemicals used to conduct anaerobic respiration experiment are
a) Diazine green (Janus Green B)
b) Bicarbonate or (Lime water)

Question 2.
Write the situations when you observe increase in Blood Pressure in your day to day life.
Answer:
Blood Pressure increases when we are afraid or excited while climbing stairs, running etc.

Question 3.
What will happen if sparrows disappear in an ecosystem?
Answer:
If sparrows were disappear from an ecosystem.
a) It could disrupt the balance from an ecosystem in several ways.
b) Sparrows play a crucial role in controlling insect population by feeding on pests like mosquitoes and caterpillars.

Section – II (3 × 4 = 12 M)

Instructions :
i) This section contains 3 short answer questions.
ii) Answer ALL the questions.
iii) Write the answers in 5 – 6 sentences.
iv) Each question carries 4 marks.

Question 4.
Observe the following table and answer the questions given below :

Tropic Movement	Response
Phototropism	The response of a plant towards light.
Chemotropism	Pollen grains grow due to chemical stimulus.
Thigmotropism	The response to contact or touch.
Geotropism	Plants respond to gravitational force.

i) Write the response for Chemotropism.
Answer:
Pollen grains grow due to chemical stimulus.

ii) Write the name of one plant which show Thigmotropism.
Answer:
Mimosa Pudica (athipathi, touch me not) plant.

iii) Which tropic movement indicates the movement of plantsTowards the Sunlight?
Answer:
Phototropism indicates the movement of plants towards the sunlight.

iv) Which tropic movement indicates the penetration of roots into-the soil?
Answer:
Geotropism indicates the penetration of roots into the soil.

Question 5.
Write any four conservation measures to be followed in daily life to avoid the depletion of fossil fuels.
Answer:
Measures to conserve fossil fuels:
a) Use public transport or carpools to travel.
b) Use air conditioners or heaters only when required.
c) Use alternative sources of energy like solar and wind energy.
d) Consider turning off the car’s engine to save fuel.

Question 6.
Explain the ‘inheritance of acquired characters’ with one example.
Answer:

1. Law of inheritance of acquired characters was proposed by Jean Baptist Lamarck.
2. He thought that the characters acquired by an organism in it’s life time are passed to its offsprings.
3. For example, at same point of time in the history, the size of giraffe was equal to that of deer.
4. Due to shortage of food materials on the ground and lower branches of trees giraffes started stretching their necks.
5. Because of continuous usage of neck, after several generations giraffes obtained longer necks.
6. Such characters that are developed during the lifetime of an organism are called acquired characters.

Section – II (3 × 4 = 12 M)

Instructions :
i) This section contains 3 essay type of questions.
ii) Answer ANY TWO questions.
iii) Write the answer in 8 to 10 sentences.
iv) Each question carries 6 marks.

Question 7.
Describe the process of digestion in human small intestine.
Answer:
The process of digestion in human small intestine :

1. The small intestine is the longest part of the alimentary canal.
2.  It is the site of the complete digestion of carbohydrates, proteins and fats-.
3. It receives the secretions of liver and pancreas.
4. Bile juice secreted by liver breaks down fats into small globules like form. This process is called emulsification.
5. Pancreatic juice secreted by pancreas contains enzymes like trypsin, which digests proteins and lipase digests fats.
6. The walls of small intestine secretes intestinal juice, which is also known as succus enteri-
7. The intestinal juice consists of enzymes like enterokinase, peptidase, lipase, sucrase, nu-cleotidase, nucleosidase etc.
8. The enzymes .present in the intestine completely digest the partially digested food.
9. Following digestive processes take place in the intestine.
   • Peptidases convert peptides into amino acids.
   • Lipase digest fats, into fatty acids and glycerol.
   • Enzyme sucrase, maltase, lactase hydrolyse sucrose, maltose and lactose respectively convert them into glucose.
10. Nucleotidase and nucleosidase complete the digestion of nucleic acids.
11. The end products of digestion, Glucose, amino acids, fatty acids and glycerol are absorbed in the walls of small intestine.

Question 8.
Explain the procedure and results of experiment to prove root pressure.
Answer:

Procedure:

1. Take a regularly watered potted plant and cut the stem portion 1 cm above the ground level.
2. Then connect a glass tube by means of a | strong rubber tube.
3. The size of the glass tube should b,e equal to the size of the stem.
4. Take care while joining tube and stem being bound tightly, so that water cannot escape from the tube.
5. Now pour some water in the glass tube until water level can be seen above the rubber tube.
6. Mark the level of water as M, in the tube.
7. Keep the arrangement a side for 2 to 3 hours.

Observation:
We observe the water level increased in tube and it is marked as M2.
i) The difference between M2 and Mj indicates the level of water raised in the stem.

Result:
It is Droved that, because of the ROOT PRESSURE the water level increased in the glass tube.

Question 9.
Draw diagrams showing different stages of Mitosis and explain.
Answer:

In the mitotic cell division, the division of nucleus (Karyokinesis) is followed by the division of Cytoplasm (Cytokinesis). Finally brings about formation of two daughter cells. There are four stages in Mitosis division. They are
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase

1) Prophase:
a) Chromosomes condense and get coiled. They become visible even in light microscope and nucleoli becomes smaller.
b) Chromosomes split lengthwise to form chromatids connected by centromeres.
c) Nuclear membrane disappears.
d) Centrosome, containing rod – like centrioles, divide and form ends of spindle (in animal cells nly).

2) Metaphase:
Chromosomes move to spindle equator, spindle fibres attached, to centromeres.

3) Anaphase:
a) Centromeres split, separating the Chromatids.
b) Spindle fibres attached Centromeres contract, pulling Chromatids towards poles.

4) Telophase:
a) Chromatids elongate, become invisible replication at this stage to become chromosomes.
b) Nuclear membrane form round daughter nuclei.
c) Nucleus is resynthesised in each daughter nucleus.

Cytokinesis :
a) Nucleus divides into two and division of cytoplasm starts, two cells are formed.
b) Cell membrane pinches to form daughter cells (animals) or new cell wall material becomes laid down across spindle equator (plants).

Part – B

Time: 15 minutes
Marks: 10

Instructions :
i) Answer all the questions.
ii) Each question carries 1 mark.
iii) Write the capital letter (A, B, C, D) showing the correct answer for the following questions in the brackets provided against them.
iv) Write the answers to the questions under Part-B on the question paper itself and attach it to the answer – book of Part – A.
v) Marks will not be awarded in any case of overwriting, rewritten or erased answers.

Question 1.
Which of the following is controlled by Cerebellum? (  )
A) Respiration
B) Emotions
C) Equilibrium
D) Blood Pressure
Answer:
C) Equilibrium

Question 2.
Identify the Question mark part in the given picture. (  )

A) Medulla
B) Cortex
C) Renal artery
D) Ureter
Answer:
A) Medulla

Question 3.
Identify the INCORRECT pair from the following. (  )
A) Leaves – Bryophyllum
B) Leaves – Turmeric
C) Bulbs – Onion
D) Stolons – Strawberry
Answer:
B) Leaves – Turmeric

Question 4.
Identify the organism without respiratory organ. (  )
A) Cockroach
B) Fish
C) Amoeba
D) Frog
Answer:
C) Amoeba

Question 5.
Match the following and identify the correct option. ( )
Fern ( ) (i) Yeast
Paramoecium ( ) (ii) Planaria
Regeneration ( ) (iii) Spores
Budding ( ) (iv) Fission

A) a – iii, b – iv, c – ii, d – i
B) a – i, b – iv, c – iii, d – ii
C) a – iv, b – ii, c – i, d – iii
D) a – iii, b – i, c – iv, d – ii
Answer:
A) a – iii, b – iv, c – ii, d – i

Question 6.
Which of the following is correct statement? (  )
A) Amoeba is a saprophyte,
B) Cuscuta is an autotrophic plant.
C) Paramoecium shows holozoic nutrition.
D) Hydrilla is a parasitic plant.
Answer:
C) Paramoecium shows holozoic nutrition.

Question 7.
Identify the missing words in the given flow chart. (  )

A) Lactic acid + Energy
B) Ethanol + Energy
C) Carbon dioxide + Water + Energy
D) Ethanol + Carbon dioxide + Energy
Answer:
C) Carbon dioxide + Water + Energy

Question 8.
Identify the function of Bowman’s capsule from the following. (  )
A) Stores urine
B) Micturition
C) Protect the kidneys
D) Filtration of substances in the blood.
Answer:
D) Filtration of substances in the blood.

Question 9.
The chemical required to conduct the experiment to prove action of Saliva on flour (ata). (  )
A) Potassium hydroxide
B) Hydrochloric acid
C) Iodine
D) Methylated spirit
Answer:
C) Iodine

Question 10.
Identify the odd one from the following. (  )
A) Late’x
B) Fats
C) Tannins
D) Resins
Answer:
B) Fats