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DSSSB TGT Life Processes — practice questions

Explore 46 free Life Processes questions in DSSSB TGT Science. Open each question or exercise to read its content, reference answers and available explanation.

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Life Processes questions and exercises with answers

Showing questions 1–30 of 46.

In humans, which chamber of the heart pumps oxygenated blood to the entire body?Read the answer and worked solution →The filtration units of the kidney are calledRead the answer and worked solution →During strenuous exercise, muscle cells respire anaerobically. The product that causes muscle cramps isRead the answer and worked solution →Oxygen liberated during photosynthesis comes fromRead the answer and worked solution →Which sequence correctly traces deoxygenated blood from the body back to the lungs?Read the answer and worked solution →Opening and closing of stomatal pores is controlled byRead the answer and worked solution →Arteries are characterised byRead the answer and worked solution →The exchange of gases between alveolar air and blood occurs byRead the answer and worked solution →In plants, water and minerals are transported throughRead the answer and worked solution →The transport of food (sucrose) in phloem from leaves to other parts is called translocation and requiresRead the answer and worked solution →Which of these is the correct summary equation of photosynthesis?Read the answer and worked solution →What prevents the backflow of blood inside the heart during contraction?Read the answer and worked solution →Blood leaving the tissues (in systemic capillaries) becomes richer inRead the answer and worked solution →Autotrophs differ from heterotrophs in that autotrophsRead the answer and worked solution →In which group does the heart NOT pump oxygenated blood to the body at all?Read the answer and worked solution →Organisms that make their own food from simple inorganic substances like CO₂ and water are called:Read the answer and worked solution →Organisms that depend on others for their food are called:Read the answer and worked solution →The process by which an organism obtains and utilises food is called:Read the answer and worked solution →The process of breaking down food using oxygen to release energy is called:Read the answer and worked solution →Green plants prepare their own food by the process of:Read the answer and worked solution →The bio-catalysts that break down complex food substances into simpler ones are:Read the answer and worked solution →The removal of harmful waste by-products of metabolism from the body is called:Read the answer and worked solution →Autotrophs include green plants and:Read the answer and worked solution →Heterotrophic organisms include:Read the answer and worked solution →Photosynthesis in plant cells takes place mainly in the:Read the answer and worked solution →Tiny pores on the surface of a leaf, through which gaseous exchange occurs, are called:Read the answer and worked solution →The green pigment that captures light energy for photosynthesis is:Read the answer and worked solution →In multicellular organisms, a transport system is needed because food and oxygen taken up at one place must:Read the answer and worked solution →Which of the following is NOT one of the four life processes covered in Class 10?Read the answer and worked solution →An organism that prepares its own food using sunlight is called:Read the answer and worked solution →

Worked practice questions

In humans, which chamber of the heart pumps oxygenated blood to the entire body?

  1. Right ventricle
  2. Left atrium
  3. Right atrium
  4. Left ventricle
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Correct answer: D. Left ventricle

The left ventricle has the thickest muscular wall and pumps oxygenated blood through the aorta to the whole body. The right ventricle pumps deoxygenated blood only to the lungs.

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The filtration units of the kidney are called

  1. nephrons
  2. neurons
  3. nephridia
  4. alveoli
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Correct answer: A. nephrons

Each kidney contains about a million nephrons, the structural and functional filtration units that filter blood and form urine.

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During strenuous exercise, muscle cells respire anaerobically. The product that causes muscle cramps is

  1. pyruvate
  2. ethanol
  3. carbon dioxide only
  4. lactic acid
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Correct answer: D. lactic acid

When oxygen is insufficient, pyruvate is converted to lactic acid in muscle cells (anaerobic respiration). Its accumulation causes cramps. Ethanol is the product in yeast, not muscle.

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