Vardaan Learning Institute

Topic: Life Processes

Class: 10 (Science) Type: Bonus Practice Paper Max. Marks: 50
Name:
Date:
SECTION A: OBJECTIVE TYPE QUESTIONS (1 Mark Each)
1. The breakdown of pyruvate to give carbon dioxide, water and energy takes place in:
  1. Cytoplasm
  2. Mitochondria
  3. Chloroplast
  4. Nucleus
2. Which portion of the human respiratory system helps in resonance of voice?
  1. Larynx
  2. Trachea
  3. Pharynx
  4. Epiglottis
3. In which part of the alimentary canal forms bile?
  1. Stomach
  2. Liver
  3. Pancreas
  4. Small Intestine
4. The mode of nutrition in Fungi is:
  1. Parasitic
  2. Saprophytic
  3. Autotrophic
  4. Holozoic
5. Movement of synthesized products from the leaves to the roots and other parts of a plant is known as:
  1. Transpiration
  2. Translocation
  3. Excretion
  4. Respiration
6. During deficiency of oxygen in tissues of human beings, pyruvic acid is converted into lactic acid in the:
  1. Cytoplasm
  2. Chloroplast
  3. Mitochondria
  4. Golgi body
7. Which of the following is the correct sequence of anaerobic respiration in yeast?
  1. Glucose $\rightarrow$ Cytoplasm $\rightarrow$ Pyruvate $\rightarrow$ Mitochondria $\rightarrow$ Ethanol + Carbon dioxide
  2. Glucose $\rightarrow$ Cytoplasm $\rightarrow$ Pyruvate $\rightarrow$ Cytoplasm $\rightarrow$ Lactic acid
  3. Glucose $\rightarrow$ Cytoplasm $\rightarrow$ Pyruvate $\rightarrow$ Mitochondria $\rightarrow$ Lactic acid
  4. Glucose $\rightarrow$ Cytoplasm $\rightarrow$ Pyruvate $\rightarrow$ Cytoplasm $\rightarrow$ Ethanol + Carbon dioxide
8. One of the following does not help in the clotting of blood. This one is:
  1. Platelets
  2. Fibrinogen
  3. Prothrombin
  4. Heparin
9. In which of the following vertebrate groups, heart does not pump oxygenated blood to different parts of the body?
  1. Pisces and Amphibians
  2. Amphibians and Reptiles
  3. Amphibians only
  4. Pisces only
10. Roots of plants absorb water from the soil through the process of:
  1. Diffusion
  2. Transpiration
  3. Osmosis
  4. None of these
Directions (Q11-Q14): In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R is not the correct explanation of A.
  3. A is true but R is false.
  4. A is false but R is true.
11. Assertion (A): The inner lining of the small intestine has numerous finger-like projections called villi.
Reason (R): The villi increase the surface area for absorption.
12. Assertion (A): Arteries have thick elastic walls.
Reason (R): Blood flows in arteries under high pressure.
13. Assertion (A): Plants excrete various waste products during their life processes.
Reason (R): Plants produce urea and uric acid as waste products.
14. Assertion (A): Left ventricle has thicker muscular walls than the right ventricle.
Reason (R): Right ventricle pumps blood to lungs, while left ventricle pumps blood to entire body.
SECTION B: SHORT ANSWER QUESTIONS (3 Marks Each)
15. Draw a neat diagram of the stomata apparatus and label: (i) Stomatal pore (ii) Guard cells. Write the function of guard cells.
16. (i) Write the balanced chemical equation for photosynthesis.
(ii) State the three major events that occur during this process.
17. (i) Differentiate between Aerobic and Anaerobic respiration.
(ii) Why does the rate of breathing in aquatic organisms differ from terrestrial organisms?
18. Differentiate between Xylem and Phloem tissues based on material transported and direction of flow.
19. What is double circulation? Why is it necessary in human beings?
20. Explain the process of formation of urine in the human kidney. (Filtration, Reabsorption, Secretion).
SECTION C: LONG ANSWER QUESTIONS (5 Marks Each)
21. (i) Draw a well-labelled diagram of Human Digestive System.
(ii) Describe the role of the following in digestion: (a) Saliva (b) Hydrochloric acid (c) Bile juice.
22. (i) Draw a schematic representation of transport and exchange of oxygen and carbon dioxide during transportation of blood in human beings.
(ii) Why does the heart have four chambers?
(iii) What is the function of valves in the heart?
SECTION D: CASE STUDY (4 Marks)
23. Read the following text and answer the questions:
Kidneys are vital organs for survival. They regulate water and ion concentration in the body. The main function of the kidney is to filter the blood and form urine. The functional unit of the kidney is the Nephron. Each kidney contains about a million nephrons. The artificial kidney is a device used to remove nitrogenous waste products from the blood through dialysis.

(i) Name the nitrogenous waste removed by the kidney. (1 Mark)
(ii) What is the cup-shaped structure at the beginning of the nephron called? (1 Mark)
(iii) Patients with kidney failure are put on dialysis. How does the dialysing fluid differ from blood plasma? (2 Marks)
24. Read the following text and answer the questions:
All living cells require energy for various activities. This energy is available by the breakdown of simple carbohydrates like glucose. Glucose may be broken down by different pathways. One pathway used by yeast is anaerobic. Another pathway occurs in muscle cells during vigorous exercise. The aerobic pathway takes place in mitochondria.

(i) What is the first step of breakdown of glucose common to all pathways? (1 Mark)
(ii) Name the energy currency of the cell. (1 Mark)
(iii) Explain why muscle cramps occur during sudden physical activity. (2 Marks)
"All the best!"