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Assignment for Class 10 Biology Chapter 6 Life Processes
Class 10 Biology students should refer to the following printable assignment in Pdf for Chapter 6 Life Processes in Class 10. This test paper with questions and answers for Class 10 Biology will be very useful for exams and help you to score good marks
Chapter 6 Life Processes Class 10 Biology Assignment
Notes on Class 10 Science Nutrition :-
1.1 Nutrition : “Nutrition” is a process of intake as well as utilization of nutrients by an organism. It is the process of breakdown of nutrients into smaller molecules and their absorption. Food provides us nutrition and energy. It contains different types of nutrients in varying amounts according to the need of our body.
1.2 Modes Or Nutrition : There are several modes of nutrition on the basis of which organisms are classified as follows :
1.4 Factors Affecting Photosynthesis :
1.5 Significance Of Photosynthesis : Photosynthesis is a boon to the nature and to the human beings. It has following significance :
(i) Production of food material
(ii) Atmospheric control and purification of air.
MCQ Questions for Class 10 Science Nutrition
(B) copper sulphate solution
(D) benedict’s solution
(B) PEP
(C) NADPH
(D) ATP
Question. Where are proteins first digested in the alimentary canal ?
(a) small intestine
(b) oesophagus
(c) mouth
(d) stomach
Answer : D
Question. The inner lining of stomach is protected by one of the following from the harmful effect of hydrochloric acid. This is :
(a) pepsin
(b) mucus
(c) saliva
(d) bile
Answer : B
Question. Which part of alimentary canal receives bile from the liver ?
(a) oesophagus
(b) small intestine
(c) stomach
(d) large intestine
Answer : B
Question. Which of the following component of our food is digested by an enzyme which is present in saliva as wellas in pancreatic juice ?
(a) proteins
(b) fat
(c) minerals
(d) carbohydrate
Answer : D
Question. If the saliva is lacking in salivary amylase, then which of the following processes taking place in the buccal 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) intestinal layer breaking down leading to ulcers
Answer : B
Question. Which of the following are the correct functions of two components of pancreatic juice trypsin and lipase ?
(a) trypsin digests proteins and lipase carbohydrates
(b) trypsin digests emulsified fats and lipase proteins
(c) trypsin digests starch and lipase fats
(d) trypsin digests proteins and lipase emulsified fats
Answer : D
Question. The oxygen liberated during photosynthesis by green plants comes from :
(a) glucose
(b) water
(c) carbon dioxide
(d) chlorophyll
Answer : B
Question. Which of the following is an incorrect statement ?
(a) energy is essential for life processes
(b) organisms grow with time
(c) movement of molecules does not take place among cells
(d) organisms must repair and maintain their body
Answer : C
Question. The internal energy (cellular energy) reserve in autotrophs is :
(a) proteins
(b) fatty acids
(c) glycogen
(d) starch
Answer : D
Question. Which of the following events does not occur in photosynthesis ?
(a) conversion of light energy into chemical energy
(b) reduction of carbon dioxide to carbohydrates
(c) oxidation of carbon to carbon dioxide
(d) absorption of light energy by chlorophyll
Answer : C
Question. The opening and closing of the stomatal pores depends upon :
(a) oxygen
(b) water in guard cells
(c) temperature
(d) concentration of CO2 in stomata
Answer : B
Question. Most of the plants absorb nitrogen in one of the following forms. This is :
(a) proteins
(b) nitrates and nitrites
(c) urea
(d) atmospheric nitrogen
Answer : B
Question. The first enzyme to mix with food in the digestive tract is :
(a) pepsin
(b) cellulose
(c) amylase
(d) trypsin
Answer : C
Question. Which of the following is the correct statement ?
(a) heterotrophs synthesise their own food
(b) heterotrophs utilize solar energy for photosynthesis
(c) heterotrophs do not synthesise their own food
(d) heterotrophs are capable of converting carbon dioxide and water into carbohydrates
Answer : C
Question. In which of the following groups of organisms the food material is broken down outside the body and then absorbed ?
(a) Mushroom, Green plants, Amoeba
(b) Yeast, Mushroom, Bread mould
(c) Paramecium, Amoeba, Cuscuta
(d) Cuscuta, Lice, Tapeworm
Answer : B
Question. Which of the following is the correct sequence of parts as they occur in the human alimentary canal ?
(a) Mouth → Stomach → Small intestine → Oesophagus → Large intestine
(b) Mouth → Oesophagus → Stomach → Large intestine → Small intestine
(c) Mouth → Stomach → Oesophagus → Small intestine → Large intestine
(d) Mouth → Oesophagus → Stomach → Small intestine → Large intestine
Answer : D
MCQ Questions for Class 10 Science Nutrition
2.1 Nutrition In Animals :
2.2 Nutrition In Lower Animals :
2.3 Nutrition In Humans :
• Humans have highly evolved and complicated digestive system consisting of an alimentary canal and different types of digestive glands.
• Alimentary canal consist of following organs :
MCQ Questions for Class 10 Science Nutrition
(B) Rate of respiration> rate of photosynthesis
(D) None of the above is correct
(B) Cuscuta
(C) Amoeba
(D) Rhizobium
(B) autotrophic
(C) saprophytic
(D) holozoic
(B) amoeba is multicellular
(D) amoeba is microscopic animal
(B) small intestine
(C) mouth
(D) large intestine
(B) duodenum
(C) stomach
(D) large intestine
(B) glucose and amino acids respectively
(D) amino acids and glucose respectively
Answer : B
Question : Partialy digested food that leaves the stomach is called :
(A) Chyle
(B) Chyme
(C) Bolus
(D) None of these
Answer : B
(B) Pancreatic juice
(C) Intestinal juice
(D) Saliva
(B) mechanical digestion
(C) involuntary action
(D) hydrolysis
Question : Peristalsis occurs in
(A) liver
(B) ureter
(C) alimentary canal
(D) hypothalamus
Answer : C
Question : Chemosynthetic bacteria obtain energy from :
(A) Sun
(B) Infra-red rays
(C) Organic substances
(D) Inorganic chemicals mainly
Answer : D
Question : In the diagram, which of the following processes are shown in Amoeba ?
(A) Exocytosis
(B) Phagocytosis
(C) Pinocytosis
(D) All of these
Answer : D
Question : The visible part of electromagnetic spectrum lies in between :
(A) X - ray and ultra-violet
(B) Ultra violet and infra red
(C) Infra red and microwave
(D) X-ray and infra red
Answer : B
Question : Liver stores glucose in the form of :
(A) Starch
(B) Glycogen
(C) Protein
(D) Cholesterol
Answer : B
Question : Gastric juice contains :
(A) Pepsin, lipase and rennin
(B) Trypsin, lipase and rennin
(C) Trypsin, pepsin and lipase
(D) Trypsin, pepsin and rennin
Answer : A
Question : What is the substrate for lipase enzyme ?
(A) Protein
(B) Carbohydrate
(C) Lipid
(D) Nucleic acid
Answer : C
Question : Human beings have vestigial vermiform appendix. The ancestors must have been
(A) insectivorous
(B) herbivorous
(C) carnivorous
(D) sangivorous.
Answer : B
Question : Which one of the following lacks enzymes ?
(A) Pancreatic juice
(B) Saliva
(C) Bile
(D) Intestinal juice
Answer : C
Question : Succus entericus is the other name of
(A) gastric juice
(B) intestinal juice
(C) bile juice
(D) saliva
Answer : B
Question : Partial removal of liver is not harmful because :
(A) Liver being a large organ can suffice the functions even if a part is removed
(B) Liver is not a very essential organ of the body
(C) Liver has regenerative capacity and will grow after partial hepatectomy
(D) The function of liver can be taken over by kidneys
Answer : C
Question : Insectivorous plants digest insects to get an essential nutrient. Other plants generally get this nutrient from the soil. What is this nutrient ?
(A) Oxygen
(B) Nitrogen
(C) Carbon dioxide
(D) Phosphates
Answer : B
Question : Main function of HCl present in gastric juice is
(A) digestion of starch
(B) emulsification of fat
(C) conversion of pepsinogen to pepsin
(D) detoxification of harmful constituents of food
Answer : C
Question : During prolong fasting, the sequence of organic compounds used by body is :
(A) Carbohydrates, fats, proteins
(B) Fats, carbohydrates, proteins
(C) Carbohydrates, proteins, lipids
(D) Proteins, lipids, carbohydrates
Answer : A
Question : Absorption of glycerol, fatty acids and monoglycerides takes place by :
(A) Lymph capillaries within villi
(B) Walls of stomach
(C) Colon
(D) Capillaries within villi
Answer : A
Question : Rennin acts on :
(A) Proteins in stomach
(B) Milk, changing casein into paracaseinate at 7.2 – 8.2 pH
(C) Fat in intestine
(D) Milk, changing casein into calcium paracaseinate at 1–3 pH.
Answer : D
Question : Emulsification refers to -
(A) Breakdown of Glucose
(B) Breakdown of Proteins
(C) Breakdown of Carbohydrates
(D) Breakdown of Fats
Answer : D
Question : Match the names of the glands listed under column I with the location given under column II and select the correct option from the codes given below :
Column I Column II
A. Crypts of lieberkuhn p. Loop of duodenum
B. Pancreas q. Stomach
C. Adrenal gland r. Intestine
D. Gastric gland s. Kidney.
(A) A = r, B = p, C = q, D = s
(B) A = r, B = p, C = s, D = q
(C) A = q, B = s, C = r, D = P
(D) A=p, B = r, C = s, D = q
Answer : B
Question : The human intestine is long because :
(A) Bacteria in food can be killed gradually
(B) It provides more surface for food storage
(C) It increases surface area for absorption of food
(D) None of these
Answer : C
Question : In the lunch, you ate boiled green vegetables, a piece of cooked meat, one boiled egg and a sugar candy. Which one of these foods may have been digested first ?
(A) Boiled green vegetables
(B) The piece of cooked meat
(C) Boiled egg
(D) Sugar candy
Answer : D
Question : Vitamin C is also called
(A) Thiamine
(B) Pantothenic acid
(C) Ascorbic acid
(D) Retinol
Answer : C
Question : Casein is digested in adults by –
(A) Rennin
(B) Renin
(C) Chymotrypsin
(D) Trypsin
Answer : A
Question : Germs entering the body along with food are killed in where pH is
(A) 10
(B) 7
(C) 3
(D) 11
Answer : C
Question : Which one of the following association is incorrect ?
(A) Protein - Trypsin
(B) Fat - Lipase
(C) Maltose - Pepsin
(D) Starch - Amylase
Answer : C
Question : Sometimes urea is fed to ruminates to improve their health. It works by
(A) Helping growth of gut microbes that break down cellulose
(B) Killing harmful microorganisms in their gut
(C) Increasing salt content in the gut
(D) Directly stimulating blood cell proliferation
Answer : A
3.1 Intestinal Glands :
They secrete intestinal juice and mucus.
3.1 (a) Digestive System :
This system involves following processes :
(i) Ingestion : Intake of food is done through mouth, food is then chewed and masticated and sent to esophagus through pharynx by swallowing.
(ii) Digestion : Saliva secreted in buccal cavity starts digestion of starch into maltose. This partly digested food is then passed to stomach by esophagus through peristaltic movement. Food is churned in stomach for about three hours and broken down into smaller pieces. Due to presence of hydrochloric acid, medium of stomach becomes acidic. In acidic medium protein digestive enzyme pepsin breaks down proteins into peptones. Gastric Lipase is also secreted here which partially breaks down lipids.
• Secretion of gastric juice is stimulated by the sight, smell or thought of food.
• Now the partly digested food moves to small intestine i.e. in the duodenum. Duodenum receives the secretion from liver and pancreas through a common duct they are bile and pancreatic juice, and alkaline in nature. So the digestion and emulsification of facts occurs at this place.
• Here in the duodenum fats are emulsified by bile, remaining proteins are digested by trypsin and starch by pancreatic amylase.
NOTE : Duodenal wall secretes bicarbonate ions which make the medium alkaline.
• This partially digested food now enters in the ileum where intestinal juice i.e. “Succus entericus” is secreted. At this place digestion is completed.
Carbohydrates→ Glucose
Proteins →Amino acids
Fats → Fatty acids and glycerol
(iii) Absorption : After digestion molecules are broken down into simpler water soluble forms now they are to be utilized, so they pass through the wall of small intestine which contains blood capillaries and enters into the blood. For absorption of fat lymph capillaries are present called as lacteals.
NOTE : Wall of small intestine have tiny finger like projections called villi, they increase the surface area for absorption.
(iv) Assimilation : The process of utilizations of food is called assimilating. The nutrients dissolved in blood are carried to all parts of the body where they are utilized.
(A) For building up and replacement of cells.
(B) For obtaining energy. This energy is released by the process of oxidation during respiration.
(v) Egestion : The undigested food is then collected in large intestine where water is absorbed and remaining waste is expelled out or egested through anus.
MCQ Questions for Class 10 Science Nutrition
Question : In amoeba the digestion of food is
(A) extracellular
(B) intracellular
(C) intercellular
(D) none of the above
Answer : B
Question : Through mastication of food is essential because
(A) mastication of food makes the teeth stronger
(B) it makes the process of swallowing the food easier
(C) by this process bigger pieces of food are broken down into smaller pieces.
(D) bigger pieces of food are broken down into smaller pieces and saliva is properly mixed with it
Answer : D
Question : The wave of contractions that pushes the food through the alimentary canal is called
(A) peritoneum
(B) peristalsis
(C) cyclosis
(D) polarisation
Answer : B
Question : In amoeba absorption of the digested nutrients occurs in
(A) contractile vacuole
(B) plasma membrane
(C) cytoplasm
(D) pseudopodia
Answer : A
Question : Coiled and well developed alimentary canal first developed in
(A) Protozoans
(B) Mammals
(C) Arthropods
(D) Poriferans
Answer : C
Question : Digestion of starch starts from
(A) stomach
(B) intestine
(C) esophagus
(D) mouth
Answer : D
Question : The path taken by food material after ingestion is represented by
(A) Mouth Pharynx Oesophagus Stomach
(B) Mouth Pharynx Oesophagus Small Intestine
(C) Mouth Oesophagus Stomach Pharynx
(D) Oesophagus Mouth Pharynx Stomach
Answer : A
Question : Teeth involved in cutting of food material are called
(A) canines
(B) incisors
(C) molars
(D) premolars
Answer : B
Question : Ptyalin enzyme is secreted by
(A) salivary glands
(B) mouth
(C) esophagus
(D) stomach
Answer : A
Question : Villi are present on
(A) stomach
(B) large intestine
(C) small intestine
(D) mouth
Answer : C
1 Give the appropriate terms to the following statements
a. Any substance taken into the body for purpose of providing nutrition.
b. Conversion of complex food particles into simpler food particles in presence of enzymes.
2 Name the enzymes found in the pancreatic juice.
3 What are the raw materials used in photosynthesis.
4 What is the role of gastric HCl ?
5 What is life process? Give some examples for life process?
6 Name the type of nutrition
a. Fungi like bread mould, yeast, mushroom breakdown the food materials outside the body and absorb it.
b. Cuscuta, lices and ticks derive nutrition from plants or animals without killing them
TWO MARKS QUESTIONS
7 How does Amoeba intake food? Briefly mention.
8 Which digestive secretion does not contain any enzyme but is very important in the process of digestion. Comment on it.
9 a) What are the major events occurring during the process of photosynthesis?
b) Name the energy transformation taking place in the process of photosynthesis.
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CBSE Class 10 Biology Chapter 6 Life Processes Assignment
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