TS 10th Class Biology Model Paper Set 6 with Solutions

by

Students must rely on TS 10th Class Biology Model Papers Set 6 to gauge their understanding of exam patterns.

TS 10th Class Biology Model Paper Set 6 with Solutions

Time: 1 Hour 30 minutes
Maximum Marks: 40

General 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 (30 Marks)
Section – I (3 × 2 = 6M)

Instructions :

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

Question 1.
What is the main reason for obesity ? How it becomes a big health hazard ?
Answer:

  1. Obesity is due to over eating and excess of energy intake. It is a big health hazard.
  2. Obesity children become the target for many diseases like diabetes, cardiovascular diseases, renal and gall bladder problems.

Question 2.
What is the role of epiglottis in respiration and swallowing food ?
Answer:
The epiglottis is a flexible flap at the superior end of the pharynx in the throat. Epiglottis acts as a lid over glottis and prevents food from entering into larynx. Air from pharynx enters the larynx while food enters into oesophagus.

TS 10th Class Biology Model Paper Set 6 with Solutions

Question 3.
What is Rhesus factor ?
Answer:

  1. It is an antigen of red blood cells which is present in 85% of the people of Britain, known as the rhesus factor.
  2. Rhesus factor was first discovered in rhesus monkeys.

Section – II (3 × 3 = 9M)

Instructions :

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

Question 4.
What are endocrine glands ? Name them.
Answer:

  1. Endocrine glands are the glands of endocrine system.
  2. They secretes their products i.e., hormones directly into the blood (or) intestitial fluid rather than a duct. So, they are also called ductless glands.
  3. The endocrine system includes the pineal gland, pituitary gland, pancreas, ovaries, testes, thyroid gland, parathyroid gland, hypothalamus and adrenal glands.

Question 5.
What do you understand about F1 generation ?
Answer:

  1. F1 generation or first filial is the offspring of first generation parents.
  2. Cross pollination of pure breeds will give F1 generation.
  3. All the individuals produced in F1 generation are heterozygous.
  4. Only the dominant characters are expressed in this generation.

Question 6.
In addition to law rainfall, what are the other reasons for non-availability of water in some region of our country ?
Answer:

  1. Flowing of rain water on the surface without percolating and lack of management to harvest it.
  2. Ground water is pumped out for high water demanding crops.
  3. Water becomes unsafe and unusable due to mixing of urban wastes and effluents from the industries.

Section – III (3 × 5 = 15M)

Instructions :

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

Question 7.
Suma decides to show that CO2 is essential for formation of carbohydrates but she has the following doubts to conduct the experiment Clarify them.
a) Why was the potted plant kept in dark room for week days prior to the experiment ?
b) What apparatus and chemicals are used and how are they arranged ?
c) How to test the results ?
d) What is the use of KOH in this experiment ?
(OR)
How did you prepare a match-stick stethoscope in your school ?
Answer:
a) A potted plant is taken and kept in the dark for nearly a week for the removal of starch from the leaves.

b) Procedure, observation and arrangement of apparatus:

  1. A potted plant is taken and Destarched.
  2. A wide mouthed glass bottle is taken.
  3. Certain amount of potassium hydroxide (KOH) is taken into the bottle.
  4. A split rubber cork is fixed to the mouth of the bottle.
  5. Half of the leaf of potted plant is inserted into the bottle.
  6. The entire set up is kept in the sunlight for few hours.

c) Inference : The inserted leaf is tested with iodine solution. The outer half of the leaf turns into blue. But the inner half of bottle absorbs CO2. As a result photosynthesis was not done inside the bottle.
Precaution : It should be seen that leaf should not contact with KOH solution.

d) Pellets of KOH absorbs C02 present in the bottle.

(OR)
TS 10th Class Biology Model Paper Set 6 with Solutions 1
Aim : To prepare a match-stick stethoscope.
Required Material : Match-stick, shirt button.
Procedure : One unused shirt button is taken and one match-stick is inserted into the hole of the button, matchstick is very straight in its position.
Now match-stick stethoscope is ready. Now the button is kept on the wrist. The movement of match-stick is observed. The pulse of the body is counted for one hour.
Observation : It is observed that the match-stick is moving rhythmically up and down.

TS 10th Class Biology Model Paper Set 6 with Solutions

Question 8.
What do you know about the cell division and continuation of life ?
(OR)
How does cell division help in. the formation of unicellular and highly evolved multicellular organisms like human being ?
Answer:

  • Continuation of life starts from cells either of the general body or the sex cells.
  • Virchow a proponent of cell theory is given the credit for the phrase “omnis cellula e cellula it means cells arise from the pre existing cells.”
  • It indicates the importance of cell division in the creation of new cells.
  • In 1852, a German scientist Robert Remak published his observations on cell division, based on his observation of embryos.
  • He stated that binary fission of cells was the means of reproduction of animal cells:
  • In 1879, Walther Flemming examined many kinds of animal and plant cells and selected those that showed division.
  • He named such process mitosis (mitos means fine threads). Later these threads like structures were named as chromosomes. They appear double in nature.
  • Wilhelm Roux proposed that chromosomes carried a different set of heritable elements.
  • They showed longitudinal splitting observed by Flemming, ensured the equal division of these elements.
  • Combined with the rediscovery of Gregor Mendel’s 1866 paper on heritable elements in peas, these results high lighted the central role of the chromosomes in carrying heritable material or genetic material.
  • The scheme of mitotic division was confirmed in 1904 by Theodor Bover. The chemical nature of the genetic material was determined after a series of experiments over the next fifty years.
  • In 1953, James Watson and Francis Crick proposed the structure of DNA (Deoxy ribonucleic acid) which is a double helix.

(OR)

  1. We know that cell as the structural and functional units of any organism. In all organisms the cell divide and form new cells.
  2. The process of cell division is same in unicellular and highly evolved in multicellular organisms like human being.
  3. Cell division is the process that transforms a human fertilized egg into a baby in nine months and into an adult in the next 20 years. Cell division in multicellular organisms occur when there is a need for it.
  4. Cells in some organs, such as heart and brain of an individual never divide.
  5. Bone marrow cells actively divide to produce red blood cells, which have a short life span in the body.
  6. If a finger is cut and bleed, soon a blood clot forms to stop the bleeding. This brings in various chemicals to the site that stimulate skin cells to divide and heal the wound.
  7. Cell division ceases as the wound is completely healed.
  8. The cell cycle help us understand better the processes involved in cell division.

Question 9.
Write a short notes on travel of food through oesophagus.
(OR)
What is ecological efficiency ? Write short notes on 10% law.
Answer:

  1. Oesophagus is a narrow tube like structure.
  2. The wall of the oesophagus is made of two types of smooth muscle cells.
  3. The inner layer is made of circular muscles and the outer layer longitudinal muscles.
  4. Contraction of the circular muscles results in narrowing of the oesophagus just behind the bolus. So the food is squeezed downwards.
  5. Contraction of the longitudinal muscles in front of the bolus widen the tube, this results in shortening of the particular part of the oesophagus.
  6. Contraction and relaxation of circular and longitudinal muscles bring in a wave like motion that propels the food bolus into the stomach by ‘peristalsis’.

(OR)
1) Ecological efficiency : The ratio between energy flows at different trophic levels along the food chain expressed as percentage is called “ecological efficiency”.

2) Ten per cent law:

  • The amount of energy transferred decreases with successive trophic levels.
  • Slobodkin (1959) suggested that the transfer of energy from one trophic level to the next is of the order of 10% and this is called “Gross ecological efficiency”.
  • Thus, 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 1 calorie at top carnivore level.
  • This is known as ten per cent law, originally observed by Lindeman (1942).
  • Defect: In 1974, Steele proved it to be 20 to 30%.

Part – B (10 Marks)

Instructions :

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

Question 1.
Pernicious anaemia is due to the deficiency of
A) Cyanocobalamine
B) Riboflavin
C) Thiamine
D) Biotin
Answer:
A) Cyanocobalamine

Question 2.
Identify the following figure.
TS 10th Class Biology Model Paper Set 6 with Solutions 2
A) Lungs
B) Chest cavity
C) Alveoli
D) Heart
Answer:
C) Alveoli

Question 3.
Fixed air = CO2:: Vitiated gas =
A) Hydrogen
B) Nitrogen
C) Oxygen
D) Carbonate
Answer:
C) Oxygen

TS 10th Class Biology Model Paper Set 6 with Solutions

Question 4.
Open type of circulatory system consists of
A) Gills and blood
B) Blood vessels and blood
C) Atrium and ventricles
D) Heart, sinus and blood
Answer:
D) Heart, sinus and blood

Question 5.
Which of the following is the correct path taken by urine in our body ?
A) Kidney, Urethra, Ureters, Bladder
B) Kidney, Ureters, Bladder, Urethra
C) Kidney, Bladder, Ureters, Urethra
D) Kidney, Urethra, Bladder, Ureters;
Answer:
B) Kidney, Ureters, Bladder, Urethra

Question 6.
Blood flows from renal artery to glomerulus through
A) Efferent arteriole
B) Renal Vein
C) Afferent arteriole
D) None
Answer:
C) Afferent arteriole

Question 7.
Match the following.

List – A List – B
1. Protozoa a) Contractile vacuole
2. Arthropoda b) Malpighian tubule
3. Mollusca c) Metanephridia

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

Question 8.
TS 10th Class Biology Model Paper Set 6 with Solutions 3
Which one is not matched correctly ?
A) 1
B) 3
C) 2
D) All of these
Answer:
C) 2

TS 10th Class Biology Model Paper Set 6 with Solutions

Question 9.
Monoploid offsprings of ants are
A) Males
B) Females
C) Bisexual
D) None of these
Answer:
A) Males

Question 10.
Wrong statement about meiosis.
i) Meiosis occurs during gamete formation
ii) Meiosis has 2 stages
iii) Though division occurs in 2 stages chromosomal division occurs only once
iv) Four daughter nuclei formed
A) i, ii
B) ii & iii
C) i, ii, iii
D) All of the above
Answer:
D) All of the above

Leave a Comment