Affiliation No.
1030309
Lions Convent Hr. Sec. School Sendhwa
CLASS-X
SUB- Biology
Chapter: Life Processes MM-80
Section A
Select and write the most appropriate option out of the four options given for each of the
questions 1-20. There is no negative mark for incorrect response.
1 The image shows the process of photosynthesis in plants [1]
Based on the image, which component is excreted by plants during photosynthesis?
a. Light energy B. Glucose c. Oxygen d. Carbon di oxide
2 The image shows the circulation of blood in fishes and humans. [1]
How is the circulations of blood in fish different from that in humans?
a. The blood goes through heart only once in fishes.
b. The heart of fish has more chambers compared to that of a human.
c. The heart in fish is bigger in size.
d. The flow of blood in fish is unidirectional
3 Identify P, Q and R in the given figure? [1]
(a) P-Gastric gland, Q-Pancreas, R-Small intestine
(b) P-Salivary glands, Q-Stomach, R-Large intestine
(c) P-Gastric gland, Q-Pancreas, R-Large intestine
(d) P-Salivary glands, Q-Pancreas, R-Small intestine
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4 The given figure is a demonstration of an experiment to show that carbon dioxide is [1]
essential forphotosynthesis. What is the substance 'X', kept in watch-glass?
a.Potassium hydroxide b. Sodium bicarbonate c. Sodium carbonate d. Potassium sulphate
5 Identify the type of nutrition exhibited by the given figure. [1]
a. Autotrophic nutrition b. Saprophytic nutrition c. Parasitic nutrition d. Symbiotic nutrition
6 Refer to the given figure and answer the following question. [1]
Which of these parts-
(I) are the actual sites of respiratory gas exchange?
(II) is the common passage for air and food?
(III) is provided with incomplete cartilaginous rings?
(IV) relaxes and gets back to its original shape during expiration?
(v) moves upwards and outwards during inspiration?
(a) (I)-s, (II)- p, (III)- q, (IV)r, (V)- t
(b) (I) - r, (II) - p, (III) - q, (IV) - s, (V) – t
(c) (I) - t, (II) - q, (III) - r, (IV) - s, (V) – P
(d) (I) - p, (II) - q, (III) - r, (IV) - s, (V) – t
7 Which of the following are parts of the human respiratory system? [1]
a. Trachea b. Diaphragm c. The lungs d. All of the above
8 Which of the following statements is true about the entry of air into the lungs? [1]
(a) Air enters the body and travels to the lungs through the mouth and the nose
(b) Air enters the body and travels to the lungs through the oesophagus and gullet
(c) Air enters the body and travels to the lungs through the windpipe and the pores
(d) Air enters the body and travels to the lungs through the nose and the nervous system.
2
9 Observe the experimental setup shown below. Name the chemical indicated as ‘X’ that can [1]
absorb the gas which is evolved as a byproduct of respiration.
a) NaOH b. KOH c. Ca (OH)2 d. K2CO3
10 1. Study the diagram given below and then answer the questions that follows: [1]
Name the parts labeled 2 and 3.
(A) 2- Bowman capsule , 3- Glomerulus
(B) 2 and 3- Bowman capsule
(C) 2- Glomerulus, 3- Bowman capsule
(D) 2- Loop of henle , 3- Glomerulus
11 Given below the two columns, Column I show enzymes secreted by the glands in the alimentary [1]
canal of human beings and columns II indicates the components of food on which enzymes act.
Choose the options showing correct matching.
Column I (Enzymes) Column II (Component)
a. Pepsin i. Starch
b. Trypsin ii. Proteins
c. Lipase iii. Proteins
d. Amylase iv. Emulsified fat
12 Plants use a completely different process for excretion as compared to animals. Which one of [1]
the following is NOT followed by plants for excretion?
a) They can get rid of excess water by transpiration
b) They selectively filter toxic substance through their leaves
c) Waste products are stored as resins and gums in old xylem.
d) They excrete waste substance into the soil around them.
13 The waste products from plants are removed through: [1]
A) Stomata
B) Lenticels
C) Felling of fruits
D) All the above
3
14 Choose the correct statement that describes arteries. [1]
(a) They have thick elastic walls, blood flows under high pressure; collect blood from
different organs andbring it back to the heart
(b) They have thick elastic walls, blood flows under low pressure; carry blood from
the heart to variousorgans of the body
(c) They have thick elastic walls without valves inside, blood flows under high pressure
and carry bloodaway from the heart to different parts of the body
(d) They have thin walls with valves inside, blood flows under low pressure and carry
blood away fromthe heart to various organs of the body.
15 Which of the following carries oxygenated blood only? [1]
A. Aorta
B. Pulmonary artery
C. Pulmonary vein
D. Capillary
(a) C and D b) A and C c) A and B d) All of these
16 Which of these samples is most probably from a pulmonary artery? [1]
(a) P
(b) Q
(c) R
(d) S
Question no 17 to 20 consists of two statements- Assertion(A) and Reason (R) . Answer these
questions selecting the appropriate option given below:
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true and R is not the correct explanation of A
(c) A is true and R is false
(d) A is false and R is true
17 Assertion: Walls of the intestine have numerous villi. [1]
Reason: These villi increase the surface area of digestion.
18 Assertion: Raw materials needed for photosynthesis are carbon dioxide, water and minerals. [1]
Reason: Nutrients provide energy to an organism.
19 Assertion (A): Aerobic respiration requires less energy as compared to anaerobic respiration. [1]
Reason (R): Mitochondria is the powerhouse of the cell.
20 Assertion (A): Pyruvate is a six-carbon molecule [1]
Reason (R): It is prepared in the cytoplasm as the first step to cellular respiration
Section B
(Q. no. 21 to 26 are very short answer questions.)
21 How opening and closing of stomata takes place? [2]
22 In single celled organism diffusion is sufficient to meet all their requirements of food, exchange [2]
of gases or removal of wastes but it is not in case of multicellular organisms. Explain the reason
for this difference.
4
23 What happens if conducting tubes of circulatory system develops a leak? [2]
24 Write any two differences between the two oxidation of glucose in organisms. [2]
25 What will happen if we keep the moist slice of bread in a cool and dark place for 1-2 days. Write [2]
your observation.
26 All plants give out oxygen during day and carbon di oxide during night. Do you agree with this [2]
statement? Justify.
Section C
(Q. no. 27 to 33 are short answer questions.)
27 Draw a neat labelled diagram of the structure of a chloroplast. [3]
28 Explain the process of breakdown of glucose in a cell [3]
(i) in the presence of oxygen,
(ii) in the absence of oxygen.
29 Draw a diagram of human excretory system [3]
OR
(a) “The breathing cycle is rhythmic whereas exchange of gases is a continuous process”. Justify
this statement.
(b) What happens if the conducting tubes of the circulatory system develop a leak? State in brief,
how could this be avoided?
c) How does the opening and closing of stomata take place?
30 Name the respiratory organs of (i) fish (ii) mosquito (iii) earthworm. [3]
31 What are the differences between autotrophic nutrition and heterotrophic nutrition? [3]
32 a. What is peristalsis ? [3]
b. What will happen if the diaphragm of a person will get ruptured in an accident ?
33 How is aerobic respiration different from anaerobic respiration [3]
Section D
(Q. no. 34 to 36 are long answer questions.)
34 a. State the role of the following in human digestive system : [5]
(I) Digestive enzymes (II) Hydrochloric acid (III) villi
b. List the three steps in photosynthesis.
c. What is the significance of Small Intestine in our body? (Any 3 points)
35 Draw a sectional view of the human heart and label the following [5]
a. The chamber of the heart that pumps out deoxygenated blood
b. The blood vessel that carries away oxygenated blood from the heart
c. The blood vessel that rece4ives deoxygenated blood from the lower part of our body
d. Part that prevents the backward flow of blood
36 (a) Name the process by which autotrophs prepare town food. [5]
(b) List the three events which occur during this process.
(c) State two sources from which plants obtain nitrogen for the synthesis of proteins and
other compounds.
OR
Write an activity to show that Carbon dioxide is necessary for photosynthesis.
5
Section E
(Q. no. 37 to 39 are case- based /data-based questions with 2 to 3 short Sub –Parts.)
( Internal choice is provided in one of these sub- parts.)
37 [4]
Many unicellular organisms remove metabolic waste products by simple diffusion from
body surface into the surrounding. While complex multicellular organisms have specialized
organs for excretion. Kidneys remove poisonous substances such as urea, waste salts and
excess water from blood and excrete them as urine. Nephron is a unit of filtration in kidneys
that filters waste material. It selectively reabsorbs or excretes water with the help of
capillaries that surround it. In case of kidney failure artificial kidney can beused.
a. What is the benefit of selective absorption?
b. The excretory system of humans include:
i. Kidney, ureter, urinary bladder, urethra
ii. A pair of kidneys, pair of ureters, pair of urinary bladder, urethra
iii. A pair of kidneys, pair of ureters, urinary bladder, urethra
iv. A pair of kidneys, ureters, urinary bladder, pair of urethra
3. Which of the following processes occur in the part shown below?
b) Tubular secretion
c) Tubular reabsorption
d) Ultra filtration
e) All of the above
4.Can nephron be compared to a filter? Which of the following represents Bowmans capsule?
38 Heterotrophic nutrition is a mode of nutrition in which organisms obtain readymade organic [4]
food from outside sources. The organisms that depend upon outside sources for obtaining
organic nutrients are calledheterotrophs. Heterotrophic nutrition is of three types:
saprophytic, parasitic and holozoic nutrition.
1. In which of the following groups of organisms food material is broken outside the body and
absorbed?
(a) Mushroom, green plants, Amoeba
(b) Yeast, mushroom, bread mould
(c) Paramecium, Amoeba, Cuscuta
(d) Cuscuta, lice, tapeworm
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2. Which of the following is a parasite?
(a) Yeast b. Taenia c. Amoeba d.Earthworm
3. Which of the following is an example of saprotroph?
(a) Grass
(b) Mushroom
(c) Amoeba
(d) Paramecium
4. Heterotrophic nutrition involves
(a) production of simple sugar from inorganic compounds
(b) utilisation of chemical energy to prepare food
(c) utilisation of energy obtained by plants
(d) all of these.
39 We need energy to perform various activities. This energy is derived from the catabolism [1+
of various components of food, e.g., proteins, carbohydrates, fats, etc. Oxygen is required 1+
for catabolic processes and carbon dioxide is released in the process. So, the body requires =2]
a continuous exchange of gases, oxygen from the atmosphere is taken inside and carbon
dioxide produced is given out. In human beings, respiratorypigment called haemoglobin
present in RBCs has very high affinity for oxygen. In tissues, exchange of gases occurs
between oxygenated blood and tissue cells.
1. People living at sea level have around 5 million RBCs per cubic millimetre of their
blood whereas thoseliving at an altitude of 5400 metres have around 8 million. This is
because at high altitude
(a) people eat more nutritive food, therefore more RBCs are formed
(b) people get pollution-free air to breathe and more oxygen is available
(c) atmospheric 02 level is less and hence more RBCs are needed to absorb the
required amount of 02 tosurvive
(d) there is more UV radiation which enhances RBC production.
2. Respiration is a process in which
(a) Energy is used up
(b) Energy is stored in the form of ATP
(c) Energy is released and stored in the form of ATP
(d) Energy is not released at all
3. Respiration differs from the process of combustion in the fact that
(a) All the energy stored in glucose in released at once due to combustion.
(b) All energy stored in glucose is gradually released due to combustion.
(c) Comparatively large quantity of energy is produced due to combustion.
(d) The carbohydrates act as the combustion substance.
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