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CBSE - Class 10 Science Life Processes Worksheet
A person has a blockage in the pulmonary artery. What will decrease first?
Oxygen supply to body tissues
b.Blood flow to lungs
c.Carbon dioxide exhalation
d.Respiratory rate
Which chamber of heart receives oxygenated blood first
Right atrium
b.Right ventricle
c.Left atrium
d.Left ventricle
Which of the following is NOT reused by the kidney?
Glucose
b.Amino acids
c.Urea
d.Water
Which of the following are energy foods?
Carbohydrates and fats
b.Proteins and mineral salts
c.Vitamins and minerals
d.Water and roughage
The opening and closing of stomata in leaves is mainly regulated by:
Guard cells
b.Xylem vessels
c.Phloem tubes
d.Root hairs
Bile helps in the digestion of
Protein
b.Carbohydrates
c.Vitamin
d.Fats
During heavy exercise, muscles may switch to anaerobic respiration due to limited oxygen supply. Anaerobic respiration releases less energy and forms lactic acid.
Assertion (A): Lactic acid causes muscle cramps.
Reason (R): Lactic acid lowers oxygen supply to muscle fibres.
Both A and R are true, and R is the correct explanation of A.
b.Both A and R are true, but R is NOT the correct explanation of A.
c.A is true but R is false.
d.A is false but R is true.
In which part of the cell does glycolysis Occur
Mitochondria
b.Cytoplasm
c.Ribosomes
d.Nucleus
The breakdown of pyruvate to give carbon dioxide, water and energy takes place in
cytoplasm.
b.mitochondria.
c.chloroplast.
d.nucleus.
The excretory system of amoeba Is
pseudopodia
b.Nucleus
c.Nephridia
d.Contractile Vacuole
The contraction and expansion movement of the walls of the food pipe is called:
translocation
b.transpiration
c.peristaltic movement
d.digestion
In which mode of nutrition an organism derives its food from the body of another organism without killing it?
Saprotrophic nutrition
b.Parasitic nutrition
c.Holozoic nutrition
d.Autotrophic nutrition
Which of these produces the most ATP
Anaerobic respiration
b.Fermentation
c.Aerobic respiration
d.Photosynthesis
Which gas is taken in and which is given out during the process of aerobic respiration?
O? taken in, CO? given out
b.CO? taken in, O? given out
c.O? taken in, N? given out
d.CO? taken in, N? given out
The blood vessel with the thickest wall is
Vein
b.Artery
c.Capillary
d.Arteriole
In which part of the alimentary Canal Is no digestion occurring
Mouth
b.Stomach
c.Esophagus
d.Small intestine
The site of complete digestion in humans is
Stomach
b.Pancreas
c.Small Intestine
d.Large intestine
Which of the following are energy foods?
Carbohydrates and fats
b.Proteins and mineral salts
c.Vitamins and minerals
d.Water and roughage
The heart pumps deoxygenated blood to the lungs and oxygenated blood to the body. Valves maintain unidirectional flow of blood.
Assertion (A): Veins appear bluish under the skin.
Reason (R): They carry deoxygenated blood at low pressure.
. Both A and R are true, and R is the correct explanation of A.
b.Both A and R are true, but R is NOT the correct explanation of A.
c.A is true but R is false.
d.A is false but R is true.
In amoeba food is digested in the
Food vacuole
b.Nucleus
c.Pseudopodia
d.Chloroplast
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