CBSE Class 10 Biology Heterotrophic Nutrition Worksheet Set 02

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LIFE PROCESSES
 
HETEROTROPHIC NUTRITION
 
• Choose the correct answer from the options given:
 
1. What is analogous to starch in the human body to store food energy for long term?
 
a. Fat                           b. Glucose                c. Glycogen               d. Carbohydrates
 
2. The mode of nutrition present in Mushroom
 
a. Autotrophic              b. Saprophytic           c. Holozoic                d. Parasitic
 
3. Which among the following is not a step coming under nutrition process
 
a. Absorption               b. diffusion                c. ingestion               d. assimilation
 
4. Which among the following is a plant parasite?
 
a. Cuscuta                   b. paramecium          c. Penicillium             d. Leech
 
5. Where is complete digestion of food takes place in human digestive system
 
a. Liver                       b. Small intestine       c. Large intestine       d. None of the above
 
6. Which is the first enzyme to mix with food in the digestive tract?
 
a. Pepsin                     b. Lipase                   c. Pancreatic Amylase      d. Trypsin
 
7. Which part of alimentary canal receives bile from the liver?
 
a. Stomach                 b. Small intestine        c. Large intestine             d. Oesophagus
 
8. Choose the function of the pancreatic juice from the following
 
a. trypsin digests proteins and lipase carbohydrates
 
b. trypsin digests emulsified fats and lipase proteins
 
c. trypsin and lipase digest fats
 
d. trypsin digests proteins and lipase emulsified fats
 
9. The inner lining of stomach is protected by one of the following from hydrochloric acid.
 
a. Pepsin                      b. Mucus                   c. salivary amylase              d. Bile
 
10. Salivary amylase is lacking in the saliva, which of the following events in the mouth cavity will be affected?
 
a. Proteins breaking down into amino acids b. Starch breaking down into sugars
 
c. Fats breaking down into fatty acids and glycerol d. Absorption of vitamins
 
Answers: 1. c, 2. b, 3. b, 4. a, 5. b, 6.a, 7.b, 8.d, 9.b, 10.b
 
• Answer the following questions
 
1. Define Nutrition. Mention the two types of nutrition.
 
• Process of obtaining nutrients from the environment i.e. intake of food and then its digestion in the body.
• Two types – Autotrophic (self-sufficient for food) and Heterotrophic (dependent on others for food).
 
2. Write short notes on nutrition in human beings Nutrition in human beings is Heterotrophic nutrition
 
• Generally take up energy from plants and animals by using them as food
• It is included under holozoic mode of heterotrophic nutrition
• Human digestive system- consists of the long alimentary canal that includes mouth, pharynx, oesophagus, stomach, small intestine, large intestine, rectum and anus.
• Organs for assistance- pancreas, liver
 
3. What is the role of tongue in digestive process?
 
Answer: Tongue helps in chewing, moistening, rolling and swallowing of food.
 
4. Write the importance of small intestine in digestion.
 
Answer: It is the longest part (about 7.5 m long) of alimentary canal. It is the site where complete digestion of carbohydrates, proteins, and fats takes place. It gets intestinal juices from two different glands – liver and pancreas that help in the further digestion of food.
 
5. What type of nutrition is shown in amoeba? What does it diet include?
 
Answer: Amoeba shows holozoic nutrition. Its diet includes bacteria, microscopic plants like the diatoms, minute algae, and microscopic animals like other protozoa, nematodes and even dead organic matter.
 
6. Name the correct substrates for the following enzymes
(a) Trypsin (b) Amylase (c) Pepsin (d) Lipase
 
Answer: a. Protein b. Starch c. protein d. emulsified fat
 
7. How do carbohydrates, proteins and fats get digested in human beings?
 
Answer:
 
➢ Carbohydrate Digestion
 
Digestion of carbohydrates starts with buccal cavity where salivary enzymes breaks down the starch into simple sugar molecules. Other sugar molecules are breakdown to glucose in small intestine.
 
➢ Protein digestion
 
Proteins are partially digested by pepsin secreted by gastric glands present in the stomach. Then Pancreatic juice secrets trypsin enzymes in small intestine where complete digestion of proteins takes place.
 
➢ Fat Digestion
 
Fats are digested in small intestine. Bile juice present in the liver emulsifies the fat which breaks fats into small globules. These small fat globules are converted into glycerol and fatty acids by Lipase enzyme

 

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Chapter 05 Life Processes Practice Sheet and Solutions for Class 10 Science

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