LIFE PROCESSES 10

PRACTICE PAPER

SUB:BIOLOGY (2020)

CLASS  X                                   LIFE PROCESSES                                                       _________________________________________________________________________________

I. Very short answer type questions:                                

1. If salivary amylase is lacking in the saliva, which events in the mouth cavity will be affected?
2. Name the secretion by which the inner lining of the stomach is protected by hydrochloric acid.
3. During deficiency of oxygen in tissues of human beings, which acid is converted into lactic acid?
4. What is common for Cuscuta, ticks, and leeches?
5. What are the functions of gastric glands present in the wall of the stomach
6. How can you test that the rice water contains starch?
7. What is the function of pancreatic juice?
8. Where does aerobic respiration occur in a cell?
9. What will happen if platelets were absent in blood?
10. What is the role of acid in our stomach?
11. Define transpiration.
12. When air is blown from the mouth into a test tube containing lime water, the lime water turns milky. Why?
13. State the function of digestive enzymes.
14. During respiration where does, the exchange of gas takes place?
15. Write the correct sequence of anaerobic respiration in yeast.
16. Write the correct sequence of aerobic respiration.
17. Write the correct sequence of air passing during inhalation.
18. Name the tissues that transport 
    (i) water and mineral in a plant (ii) transport soluble product of photosynthesis in plants.
19. Where does the digestion of fat take place in our bodies?
20. What is the role of saliva in the digestion of food?
21. What are the final products of carbohydrates, protein, and fats after their digestion? 
22. Stomata of desert plants remain closed during the daytime? How do they take up CO2 and perform photosynthesis?
23. Write two major components of human urine.
24. A major amount of water selectively reabsorbed by the tubular part of the nephron in humans. What are the two factors on which the amount of water reabsorbed depends?
25. What happens to glucose, amino acids, salt and water that enter the nephron along with filtrate? 
26. Why is diffusion not sufficient to meet the oxygen requirements of all the cells in multicellular organisms?
27. Write the equation of photosynthesis?
28. Name the energy currency in the living organism. When and where it is produced?
29. What is the structural and functional unit of the kidney? 
30. On which of the opening and closing of the stomatal pore depends? 

II. Short answer type questions: 

1.  How does the guard cell regulate opening and closing the stomatal pores?
2. State any two differences between arteries and veins. What function is served by the following: (i) gastric sphincter (ii) anal sphincter.
3. What function is served by the following: (i) gastric sphincter (ii) anal sphincter.
4. List any four strategies used by plants for excretion.
5. Leaves of a healthy potted plant wire coated with Vaseline. Will these plants remain healthy for long? Give reasons for your answer.
6. Write three differences between aerobic and anaerobic respiration.
7. What is the internal energy that reserve in plants? 
8. How do leaves of plants help in excretion?
9. Differentiate between artery and vein.
10. How is the process of transmission useful for plants?
11. Plants have low energy needs as compared to animals. Explain.
12. How are the alveoli designs to maximize the exchange of gases?
13. When a sportsman runs, he often gets muscle cramps. Why?
14. What is the adaptation of leaf for photosynthesis?
15. Some finger-like projections are present in the inner wall of a small intestine write their names? Why are they important?
16. Name the extensively coiled structure of the elementary Canal. Compare the length of the small intestine in herbivores and carnivores.
17. List the events that occur during the process of photosynthesis.
18. List the three kinds of blood vessels of the human circulatory system and write their functions in tabular form.
19. Name three different glands associated with the digestive system in humans. Also, name their secretions.
20. Why do the walls of the trachea not collapse when there is less air in it.
21. What are villi?  Explain their functions in the digestive system.
22. Define transpiration. States it's two functions.
23. Why do ventricles have thicker muscular walls than atria?
24. What is the peristaltic movement?
25. Name the enzymes present in pancreatic juice and give their functions.
26. List three characteristics of lungs which make it an efficient respiratory surface.
27.  Why does the absorption of digested food occur mainly in the small intestine?
28. What is excretion? How do unicellular organisms remove their wastes?
29. Name the material transported by the following (a) xylem (b) Pulmonary artery (c) Pulmonary veins (d) Phloem.
30. Explain the significations of peristaltic movement that occur all along the gut during digestion.
31. Which mechanism plays an important role in the transportation of water in Plants? (i) during daytime (ii) at night.
32. Why does the medium become acidic in the mouth? What is the ill effect of this acidic medium? How can this be prevented?
33. What is translocation? How it takes place in plants?
34. Name the substrates from the following enzyme: Trypsin, Amylase, Pepsin, and Lipase.
35. Why do we feel a cramp in our muscles during certain physical activities?

III. Long answer type questions: 

1. I. Why do aquatic animals have a faster rate of breathing compared to terrestrial animals? Name the enzyme present in saliva and state its function.
   II. Draw the diagram of the human respiratory system and label the following:
   (i) the part where the air is filtered by the fine hair mucus 
   (ii) The part which terminates balloon-like structure 
   (iii) The balloon-like structure where the exchange of gases takes place 
   (iv) The part which separates the chest cavity from the abdominal cavity.
2. Describe the flow of blood through the heart of human beings.
3. Describe the process of urine formation in the kidney.
4. Why is blood circulation in the human heart called double circulation?
5. With the help of a schematic flow chart, show the breakdown of glucose in a cell to provide energy:
   (i) in the presence of oxygen 
   (ii) in the absence of oxygen
   (iii) when there is a lack of oxygen.
6. I. Name the following:
    (i) The process in plants that links light energy with chemical energy
    (ii) Organisms that cannot prepare their own food.
    (iii) An enzyme secreted from gastric glands in the stomach act on protein.
    (iv) Cells that surround a stomatal pore.
    (v) The cell organelle where photosynthesis occurs.
   II.  (i) List two functions performed by dilute hydrochloric acid in our stomach.
   (ii) Name the raw materials required for photosynthesis.
7. I. Name the following:
   (i) Where food is completely digested?
   (ii) Juice contains trypsin enzymes.
   (iii) Who secretes bile juice?
   (iv) That absorbs water from an unabsorbed food.
   (v) Two secretions released by a gastric gland.
   II. List two major steps involved in the formation of urine and state in brief their functions.
8. I. List the role of each of the following in our digestive system.
   (i) Muscles of the stomach wall
   (ii) Hydrochloric acid.
   (iii) Mucus.
   II. What is lymph? How is the composition of lymph different from blood plasma? List two functions of the lymphatic system.
9. Give reasons for :
   (i) Oxygenated and Deoxygenated blood is separate in the heart of mammals.
   (ii) Ventricles are thick-walled.
   (iii) Herbivores have longer small intestine as compared to carnivores.
10. 10. Give reasons:
    (i) Blood goes only once through the heart in fishes.
    (ii) Plants have low energy needs.
    (iii) what are capillaries?
11. (a) Draw the human excretory system and label the following parts:
    (i) left kidney (ii) urinary bladder (iii) vena cava (iv) Urethra (v) Left ureter (vi) Left renal vein (v)left renal artery.
    (b) State the purpose of making urine.
    (c) Name any two substances which are selectively reabsorbed from the tubules of the nephron.
12.  I. Draw a diagram of a cross-section of the human heart and label the following parts :
    (i) Right ventricles (ii) Aorta (iii) Left atrium (iv) Pulmonary arteries.
    II. Give reasons for the following:
    (i) The muscular wall of the ventricles is thicker than the walls of the atria.
    (ii) Arteries have thick elastic walls.
13.  Why is the rate of breathing in aquatic organisms much faster than terrestrial organisms?
14. Why and how does water enter continuously into the root xylem? Why is transpiration important for plants?
15. I. Name the factors on which the amount of water reabsorbed along the tubular part of the nephron depends on.
    II. Draw a diagram of the human excretory system and label the following :
    (i) part in which urine is produced
    (ii) parts which store the urine
    (iii) the part which connects (i) and(ii)
    (iv) the part from which urine is passed out. Explain the process of nutrition in amoeba with the help of a diagram.
16. I. Explain how paramecium obtains its food?
    II. Draw a labelled diagram of the human alimentary canal and label the following parts; (i) Liver (ii) Pancreas (iii) Small intestine (ii) Large intestine.
17. (a) Draw a diagram of an excretory unit of a human kidney and label the following: Bowman's capsule, glomerulus, collecting duct, tubular part of the nephron, and renal artery.
18. (b) Write the important functions of the structural and functional unit of the kidney.
    (c) Write any one function of an artificial kidney.
19. I. Explain the mechanism of photosynthesis.
    How the transport of materials in xylem and phloem does occur? What is translocation?
    II. II. Draw a diagram of a cross-section of a leaf and label the following part:
    (i) chloroplast (ii) cuticle.
20. In human alimentary canal name the site of the complete digestion of various components of food. Explain the process of digestion.

Chapter 1 - Chemical Reactions and  Equations	Quick View	Questions with Solutions
Chapter 2 - Acid, Bases and Salt	Quick View	Questions with Solutions
Chapter 3 - Metal and Non-metals	Quick View	Questions with Solutions
Chapter 4 - Carbon and it's compound	Quick View	Questions with Solutions
Chapter 5 - Periodic Classification of Elements	Quick View	Questions with Solutions
Chapter 6 - Life Processes	Quick View	Questions with Solutions
Chapter 7 - Control and Co-ordination	Quick View	Questions with Solutions
Chapter 8 - How do Organisms Reproduce?	Quick View	Questions with Solutions
Chapter 9 -  Health and Heredity	Quick View
Chapter 10 -  Reflection and Refraction	Quick View	Questions with Solutions
Chapter 11 -  Human Eye Colourful World	Quick View	Questions with Solutions
Chapter 12 -  Electricity	Quick View	Questions with Solutions
Chapter 13 -  Magnetic Effect of Electric Current	Quick View	Questions with Solutions
Chapter 14 -  Sources of Energy	Quick View
Chapter 15  - Our Environment	Quick View
Chapter 16 - Management of  Natural  Resources	Quick View