Life Process

Q1: The chlorophyll in photosynthesis is used for

• Absorbing light
• Breaking down water molecule
• No function
• Reduction of CO2

Q2: The enzyme responsible for the digestion of proteins in the small intestine is:

• Pepsin
• Trypsin
• Amylase
• Lipase

Q3: Which of the following are energy foods?

• Carbohydrates and fats
• Proteins and mineral salts
• Vitamins and minerals
• Water and roughage

Q4: In which group of the organisms the food material is broken down outside the body ?

• Mushroom, green plants, amoeba
• Yeast, mushroom, bread mould
• Paramecium, amoeba, cuscuta
• Cuscuta, lice, tapeworm

Q5: Proteins after digestion are converted into

• Carbohydrates
• Small globules
• Amino acids
• Starch

Q6: The part where the exchange of gases occurs during respiration is:

• Lungs and larynx
• Alveoli and throat
• Throat and lungs
• Alveoli and capillaries

Q7: In which mode of nutrition an organism de-rives its food from the body of another living organism without killing it?

• Saprotrophic nutrition
• Parasitic nutrition
• Holozoic nutrition
• Autotrophic nutrition

Q8: Select the correct statement –

• Hetrotrophs make their food
• Heterotrophs utilize solar energy to make food
• Heterotrophs do not make their own food
• Heterotrophs are capable of converting carbon dioxide and water into carbohydrates

Q9: Carbohydrates in the plants are stored in the form of

• Glycogen
• Starch
• Glucose
• Maltose

Q10: The backflow of blood during the pumping of blood by heart is prevented by:

• Walls of ventricles
• Walls of the atrium
• Valves in the heart
• Walls between atria and ventricles

Q11: The mode of nutrition found in fungi is:

• Parasitic nutrition
• Holozoic nutrition
• Autotrophic nutrition
• Saprotrophic nutrition

Q12: Which of the following statements about autotrophs is incorrect ?

• They synthesize carbohydrates by using carbon dioxide , water in presence of sunlight and chlorophyll
• They store carbohydrates in form of starch
• They convert carbon dioxide and water into carbohydrates in the absence of sunlight
• They form the first trophic level in food chain

Q13: Main site of photosynthesis

• Leaf
• Stem
• Chloroplast
• Guard cells

Q14: The process of digestion is completed by:

• Intestinal juice
• trypsin
• bile juice
• pepsin

Q15: Roots of the plants absorb water from the soil through the process of:

• diffusion
• transpiration
• osmosis
• None of these

Q16: Which of these reactions occur in photosynthesis?

• Carbon dioxide is reduced and water is oxidized
• water is reduced and carbon dioxide is oxidized
• carbon dioxide and water are oxidized
• carbon dioxide and water are reduced

Q17: The small pores present of the leaf’s surface are called

• Stomata
• Chlorophyll
• Guard cells
• None of these

Q18: The extracellular fluid released from the capillaries is:

• serum
• plasma
• lymph
• mucus

Q19: The site of photosynthesis in the cells of a leaf is

• chloroplast
• mitochondria
• cytoplasm
• protoplasm

Q20: A few drops of iodine solution were added to rice water. The solution turned blue black in colour. This indicates rice water has –

• complex proteins
• simple proteins
• starch
• Fats

Q21: Photosynthesis is a

• Catabolic process
• Parabolic process
• Amphibolic process
• Photochemical process

Q22: A few drops of iodine solution were added to rice water. The solution turned blue-black in colour. This indicates that rice water contains

• complex proteins
• simple proteins
• fats
• starch

Q23: In amoeba, food is digested in the:

• food vacuole
• mitochondria
• pseudopodia
• chloroplast

Q24: Which is the correct sequence –

• mouth → stomach → small intestine → esophagus → large intestine
• mouth → esophagus → stomach → large intestine → small intestine
• mouth → stomach → esophagus → small intestine → large intestine
• mouth → esophagus → stomach → small intestine → large intestine

Q25: Opening and closing of pores is a function performed by

• Stomata
• Chlorophyll
• Chloroplast
• Guard cells

Q26: In which part of the alimentary canal food is finally digested?

• Stomach
• Mouth cavity
• Large intestine
• Small intestine

Q27: Which of the following events in the mouth cavity will be affected if salivary amylase is lacking in the saliva?

• Starch breaking down into sugars.
• Proteins breaking down into amino acids.
• Absorption of vitamins.
• Fats breaking down into fatty acids and glycerol.

Q28: If salivary amylase is lacking in saliva, which of the event in the mouth will be affected-

• Proteins breaking down into amino acids
• starch breaking down into sugars
• Fats breaking down into fatty acids and glycerol
• Absorption of vitamins

Q29: Which element is used in the synthesis of proteins?

• Hydrogen
• Oxygen
• Nitrogen
• Carbon dioxide

Q30: When air is blown from the mouth into a test tube containing lime water, the lime water turned milky due to the presence of

• oxygen
• carbon dioxide
• nitrogen
• water vapor

Q31: Which region of the alimentary canal absorbs the digested food?

• Stomach
• Small intestine
• Large intestine
• Liver

Q32: The inner lining of the stomach is protected by one of the following from hydrochloric acid. Choose the correct one

• Mucus
• Salivary amylase
• Pepsin
• Bile

Q33: Temporary finger like extensions on amoeba are called

• Cell membrane
• Cell wall
• Pseudopodia
• Cilia

Q34: What prevents backflow of blood inside the heart during contraction?

• Valves in heart
• Thick muscular walls of ventricles
• Thin walls of atria
• All of the above

Q35: The contraction and expansion movement of the walls of the food pipe is called:

• translocation
• transpiration
• peristaltic movement
• digestion

Q36: Which part of alimentary canal receives bile from liver –

• stomach
• small intestine
• large intestine
• oesophagus

Q37: Bile juice is secreted by

• Stomach
• Pancreas
• Small intestine
• Liver

Q38: In which of the following vertebrate group/groups, heart does not pump oxygenated blood to different parts of the body?

• Pisces and amphibians
• Amphibians and reptiles
• Amphibians only
• Pisces only

Q39: When a few drops of iodine solution are added to rice water, the solution turns blue- black in colour. This indicates that rice water contains:

• fats
• complex proteins
• starch
• simple proteins

Q40: In which part of alimentary canal food is finally digested ?

• large intestine
• Stomach
• Mouth cavity
• small intestine

Q41: Which of these juices is secreted by pancreas?

• Trypsin
• Pepsin
• Bile juice
• Both I and II

Q42: Which of the following equations is the summary of photosynthesis?

• 6CO2 + 12H2O → C6H12O6 + 6O2 + 6H2O
• 6CO2 + H2O + Sunlight → C6H12O6 + O2 + 6H2O
• 6CO2 + 12H2O + Chlorophyll + Sunlight → C6H12O6 + 6O2 + 6H2O
• 6CO2 + 12H2O + Chlorophyll + Sunlight → C6H12O6 + 6CO2 + 6H2O

Q43: The exit of unabsorbed food material is regulated by

• liver
• anus
• small intestine
• anal sphincter

Q44: Choose the function of pancreatic juice from following :

• Trypsin digests proteins and lipase digests carbohydrates
• Trypsin digests emulsified fats and lipase digests proteins
• Trypsin and lipase digest fats
• Trypsin digests proteins and lipase digests emulsified fats

Q45: Lipase acts on

• Amino acids
• Fats
• Carbohydrates
• All of these

Q46: Which is the first enzyme to mix with food in the digestive tract?

• Pepsin
• Cellulose
• Amylase
• Trypsin

Q47: What are the products obtained by anaerobic respiration in plants?

• Lactic acid + Energy
• Carbon dioxide + Water + Energy
• Ethanol + Carbon dioxide + Energy
• Pyruvate

Q48: The correct sequence of anaerobic respiration –

• Glucose → pyruvate → lactic acid
• glucose → pyruvate → carbon dioxide + ethanol
• glucose → pyruvate → ADP→ lactic acid
• glucose -→ pyruvate → carbon dioxide + ethanol + energy

Q49: Respiratory pigment in human body is

• Chlorophyll
• Water
• Blood
• hemoglobin

Q50: Lack of oxygen in muscles often leads to cramps among cricketers. This results due to

• conversion of pyruvate to ethanol
• conversion of pyruvate to glucose
• non conversion of glucose to pyruvate
• conversion of pyruvate to lactic acid

Q51: The breakdown of pyruvate to give carbon di-oxide, water and energy takes place in

• cytoplasm
• mitochondria
• chloroplast
• nucleus

Q52: The pancreatic juice doesn’t contain following enzymes-

• Trypsin
• Amylase
• Lipase
• Ptyalin

Q53: Blood consist of what fluid medium?

• Lymph
• Platelets
• Plasma
• All of these

Q54: Choose the correct path of urine in our body

• kidney → ureter → urethra → urinary bladder
• kidney → urinary bladder → urethra → ureter
• kidney → ureters → urinary bladder → urethra
• urinary bladder → kidney → ureter → urethra

Q55: The glycolysis process occurs in which part of the cell?

• Cytoplasm
• Nucleus
• Mitochondria
• Chloroplast

Q56: The pancreas pours their secretion into ___.

• Small intestine
• large intestine
• stomach
• Duodenum

Q57: One cell-thick vessels are called

• Arteries
• Veins
• Capillaries
• Pulmonary artery

Q58: Name the substances whose build-up in the muscles during vigorous physical exercise may cause cramps?

• Ethanol + Carbon dioxide + Energy
• Lactic acid + Energy
• Carbon dioxide + Water + Energy
• Pyruvate

Q59: Name the pores in a leaf through which the respiratory exchange of gases takes place.

• Lenticels
• Vacuoles
• Xylem
• Stomata

Q60: The respiratory pigment in human beings is:

• carotene
• chlorophyll
• hemoglobin
• mitochondria