TS 10th Class Biology Model Paper Set 5 with Solutions

Students must rely on TS 10th Class Biology Model Papers Set 5 to gauge their understanding of exam patterns.

TS 10th Class Biology Model Paper Set 5 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 attached to the Part – A answer sheet.
6. Write the answers following the instructions given in each section.

Part – B (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.
How do you identify pellagra?
Answer:

1. Patients of pellagra suffer from dermatitis, diarrhea, and dementia.
2. When their skin is exposed to sunlight their skin becomes pigmented, scaly, and cracked.

Question 2.
Can we say that combustion and respiration are almost same actions? What evidences do you have for this?
Answer:

1. in both these processes sugar is converted to carbon dioxide and water.
2. Both these processes require oxygen.
3. Both combustion and respiration release energy.

Question 3.
Why doctors advised to take low amounts of salt in food?
Answer:
If salt is not reduced in food the salt levels increase in blood and cause other problems in the body. Salt (sodium) levels will be more in accumulated water at the time of edema. Hence it is advised to take low amount of salt in food.

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.
Divide the following into groups based on their actions. (walking, blinking of eye, heartbeat, laughing, digestion of food, reading etc.)
Answer:

• The given actions are divided based on the stimulus and response of our body.
• Some are voluntary actions like E.g.: Walking, laughing, and reading.
• There are involuntary actions like E.g.: Blinking of eye, heartbeat, and digestion of food.
• Voluntary actions are under the control of the brain.
• Involuntary actions are under the influence of reflex-are.

Question 5.
How do traits get expressed according to Mendel?
Answer:

1. Mendel hypothesized that each character or trait is expressed due to a pair of factors or alleles’, as he named them.
2. Now we know that these are known as genes.
3. Gene is a segment of nucleic acid called DNA which is present in the nucleus of every cell.

Question 6.
How do we follow sustainable forestry practices?
Answer:
Sustainable forestry practices are critical for ensuring resources well into the future.
They are:

• Low-impact logging practices.
• Harvesting with natural regeneration in mind. ,
• Avoiding certain logging techniques, such as removing all the high-value trees.

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.
Do the malnutrition reason for diseases? Why? Write any of such diseases and its characters.
(OR)
Classify different types of blood vessels in humans. On what basis you classified the blood vessels?
Answer:

1. Yes, malnutrition is the reason for occurrence of diseases.
2. Malnutrition is eating of food that does not have one or more than one nutrient in required amount.
3. This results in scarcity of nutrients for the proper growth and health of the individual.
4. Kwashiorkor disease occurs in children due to the deficiency of proteins in the diet.

Characteristic features of kwashiorkor disease:

1. Body parts becomes swollen due to accumulation of water in the intercellular spaces.
2. Very poor muscle development, swollen legs, fluffy face, difficult to eat, diarrhea, dry skin are the symptoms of kwashiorkor disease.
3. The child becomes lethargic and shows little interest in its surroundings or in playing and learning.

(OR)
There are two different types of blood vessels in human body i) Arteries ii) Veins. They are classified on the basis of blood flow in between the body parts and heart. Arteries carry the blood from heart to the cells of body. Veins carry the blood from the cells of body to heart.

Blood vessels that bring blood to the heart:

1. Superior vena cava (Or) Precaval vein: It collects deoxygenated blood from the upper parts of the body.
2. Inferior vena cava (Or) Post cava vein: It brings deoxygenated blood from lower parts of the body to heart.
3. Pulmonary vein: It brings oxygenated blood from the lungs and opens into left auricle of the heart.

Blood vessels that carry blood away from heart:

1. Systemic aorta or artery: It arises from left ventricle and carries oxygenated blood to all the body organs except lungs.
2. Pulmonary aorta: It carries deoxygenated blood from right ventricle to lungs.

Question 8.
Describe female reproductive system with well labelled diagram.
(OR)
What are the changes that occur ¡ri Metaphase, Anaphase and Telophase of the mitosis cell division?

Answer:

1. The female reproductive system consists of ovaries, oviduct, uterus, and vagina.
2. Two ovaries where ova are formed are located deep in the lower abdomen of female body.
3. The ova develops in tiny cellular structures called follicles.
4. Which at first look like cellular bubbles in the ovary and are called graffian follicles.
5. As a follicle grows it develops a cavity-filled Female reproductive system with fluid.
6. When an ovum is matured, the follicle ruptures at the surface of the ovary and the tiny ovum is flushed out.
7. Generally, the ovum enters the widened funnel of an oviduct, a tube that extends from the neighbourhood of an ovary to the muscular thick-walled uterus.
8. This uterus which is sac-like called vana.
9. Ovaries secretes two types of hormones which help in ovulation and menstruation.
10. Women got the capacity to produce ova from the age of 10 – 12 years and it will continue upto the age of 45 – 50 years.

(OR)
Metaphase:

1. During metaphase chromosomes move to the spindle equator, centromeres attached to spindle fibers.
2. Centromeres split, separating the chromatids.

Anaphase:
In this phase fibres attached to centromeres contract, pulling chromatids towards poles.
Telophase:

1. In this phase, chromatids elongate become invisible.
2. Nuclear membranes form round daughter nuclei.
3. Cell membrane pinches in, to form daughter cells or new cell wall materials becomes laid down across spindle equator.
4. Nucleus divides into two and division of cytoplasm starts.

Question 9.
What do you think how the food is controlled while it passes in the oesophagus?
(Or)
Explain the movement of food in oesophagus through peristaltic movements along with diagram.
(OR)
Which pyramid is always upright? Why?
Answer:

1. Due to the contraction and relaxation of the muscles the food bolus in oesophagus, propels into the stomach. It is called peristalsis. It is an involuntary action.
2. Due to the peristaltic movements in the oesophagus the food moves forward.
3. The walls of the food pipe secrete a slippery substance called mucus. It lubricates and protects the oesophageal wall from damage.
4. The wall of the oesophagus comprises two types of mouth muscles. The inner layer comprises circular muscles and the outer layer comprises longitudinal muscles.
5. Contraction of the circular muscles results in narrowing of the oesophagus just behind the bolus. So the food is squeezed downwards.
6. Contraction of the longitudiñal muscles in front of the bolus, widens the tube, this results in shortening of that particular part of oesophagus.
7. The contraction and relaxation of these muscles create a wave-like motion, that propels the food bolus into stomach.
8. The total process is under the control of the autonomoùs nervous system.

(OR)

1. The pyramid of energy is always upright.
2. This is because only 10% of the energy present in atrophic level transfers to the other level.
3. If there are 1000 calories of net production at producer level, only 100 calories of secondary production would be expected at the herbivore level, only 10 calories at first carnivore level, and I calorie at top carnivore level.
4. The flow of energy from producers to consumers is unidirectional.
5. So energy at producer level is always greater than the energy at primary consumer level and so on.
6. Hence the pyramid of energy is always upright with a typical pyramid shape.
7. But in case of pyramid of numbers, number of producers may be less than consumers. In some ecosystems or number of primary consumers may be less than secondary consumers etc., causing inverted or partly upright.
8. In case of pyramid of biomass also the pyramid may be inverted as in aquatic ecosystem, where the biomass of producers is less than that of consumers.

Part-B (Marks 10)

Instructions:

• Write the answers to the questions under Part – B on the question paper itself 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.
The four important factors of photosynthesis are ( )
A) light, CO₂, chlorophyll and temperature
B) light, chlorophyll, water and temperature
C) light, CO₂, water and chlorophyll
D) water, chlorophyll, temperature, and CO₂.
Answer:
C) light, CO₂, water and chlorophyll

Question 2.
Glucose → Pyruvate → CO₂ + Water + More energy ( )
A) Bacteria
B) Animals
C) Plants
D) B and C
Answer:
A) Bacteria

Question 3.
The interior lung is divided into millions of small chambers called ( )
A) Nephrons
B) Corpus Leuteum
C) Alveolus
D) Neuron
Answer:
B) Corpus Leuteum

Question 4.
Which of the following opinion is correct? ( )
A) Ravi said, xylem and phloem cells arranged one upon the other to form a tube-like structure.
B) John said that xylem and phloem are not separate tube-like structures.
C) Salma said, the xylem and phloem cells connect together to form a tube-like structure.
D) Han said, because of its shape they said to be tube-like structures.
Answer:
C) Salma said, the xylem and phloem cells connect together to form a tube-like structure.

Question 5.
Tears are ……………….. . ( )
A) Involuntary fluid
B) Secretion
C) Excretion
D) Water
Answer:
C) Excretion

Question 6.
Some animals can’t eat some parts of the plants. Because ( )
a) They do not have taste
b) Wastes are stored in them
c) They have thorns’
d) Animals don’t prefer them for food
A) a, b are false
B) c, d are true
C) c, d are false
D) a, b are true
Answer:
D) a, b are true

Question 7.
Read the given table. ( )
Organism Excretory system organs
Coelenterate Water vascular system.
Annetida Nephridla
Birds Kidney
Name the group organism that performs water vascular system other than coelenterate.
A) Protozoa
B) Porifera
C) Mollusca
D) Manmali
Answer:
B) Porifera

Question 8.
We can’t see anything soon after entering a dark room. Find the reason.
a) Cones in the eyes do not respond
b) The radius of pupil decreases
A) both a and b are true b explains ‘a’.
B) both a and b are true. b Does Flot explain ‘a’
C) a is true,b is false
D) b is false, a is false
Answer:
D) b is false, a is false

Question 9.
Find out the correct sentence ( )
a – Centromeres in metaphase split and separate the chromatids.
b – Nucleus divides into two in prophase
A) both a & b are true
B) a is true, b is false
C) a is false, b is true
D) both a & b are false
Answer:
B) a is true, b is false

Question 10.
The chromosomal number becomes half in certain types of cells in cell division. This type of cell division takes place in
( )
A) In testes
B) In ovaries
C) In both
D) In all body cells
Answer:
C) In both