The enzyme responsible for the digestion of proteins in the small intestine is:
  • Pepsin
  • Trypsin
  • Amylase
  • Lipase
The part where the exchange of gases occurs during respiration is:
  • Lungs and larynx
  • Alveoli and throat
  • Throat and lungs
  • Alveoli and capillaries
The back flow of blood during the pumping of blood by heart is prevented by:
  • Walls of ventncles
  • Walls of atrium
  • Valves in heart
  • Walls between atria and ventricles
The process of digestion is completed by:
  • Intestinal juice
  • trypsin
  • bile juice
  • pepsin
The extracellular fluid released from the capillaries is:
  • serum
  • plasma
  • lymph
  • mucus
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
In which part of the alimentary canal food is finally digested?
  • Stomach
  • Mouth cavity
  • Large intestine
  • Small intestine
When air is blown from mouth into a test-tube containing lime water, the lime water turned milky due to the presence of
  • oxygen
  • carbon dioxide
  • nitrogen
  • water vapour
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
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
Which of the following equations is the summary of photosynthesis?
  • 6CO
  • 6C
  • O
  • None of the above
Which is the first enzyme to mix with food i the digestive tract?
  • Pepsin
  • Cellulose
  • Amylase
  • Trypsin
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
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
In which mode of nutrition an organism derives its food from the body of another living organism without killing it?
  • Saprotrophic nutrition
  • Parasitic nutrition
  • Autotrophic nutrition
  • Holozoic nutrition
The filtration units of kidneys are called
  • nephrons
  • Ureter
  • Neurons
  • Urethra
A gland not associated with the alimentary canal is
  • adrenal
  • salivary glands
  • pancreas
  • liver
Choose the event that does not occur in photosynthesis?
  • Conversion of light energy to chemical energy
  • Reduction of carbon dioxide to carbohydrates
  • Absorption of light energy by chlorophyll
  • Oxidation of carbon to carbon dioxide
The back flow of blood during the pumping of blood by heart is prevented by:
  • Valves in heart
  • Walls of atrium
  • Walls of ventricles
  • Walls between atria and ventricles
Trachea do not collapse when there is not much air because they are:
  • have valves
  • supported by larynx
  • having cartilaginous rings
  • thick and muscular
Choose the form in which most of the plants absorb nitrogen from the atmosphere ?
  • atmospheric nitrogen
  • nitrates and nitrites
  • amino acids
  • proteins
Lipase acts on
  • Carbohydrates
  • Amino acids
  • Fats
  • All of these
Oxygen released during photosynthesis comes from
  • carbon dioxide
  • Chlorophyll
  • water
  • glucose
A large quantity of one of the following is removed from our body by lungs:
  • ammonia
  • FLO only
  • CO2 only
  • CO2 and H2O
Which of the following events in the mouth cavity will be affected if salivary amylase is lacking in the saliva?
  • Proteins breaking down into amino acids
  • Absorption of vitamins
  • Fats breaking down into fatty acids and glycerol
  • Starch breaking down into sugars
What are the products obtained by anaerobic respiration in plants?
  • Pyruvate
  • Lactic acid + Energy
  • Ethanol + Carbon dioxide + Energy
  • Carbon dioxide + Water + Energy
Photosynthesis is a
  • Catabolic process
  • Parabolic process
  • Photochemical process
  • Amphibolic process
Glycolysis process occurs in which part of the cell?
  • Nucleus
  • Cytoplasm
  • Chloroplast
  • Mitochondria
The part where the exchange of gases occurs during respiration is:
  • Lungs and larynx
  • Throat and lungs
  • Alveoli and capillaries
  • Alveoli and throat
Name the part of alimentary canal receiving bile from the liver.
  • Small intestine
  • Stomach
  • Large intestine
  • Oesophagus
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