MCQ Chapter 6 Life Processes Class 10 Science

Please refer to Life Processes MCQ Questions Class 10 Science below. These MCQ questions for Class 10 Science with answers have been designed as per the latest NCERT, CBSE books, and syllabus issued for the current academic year. These objective questions for Life Processes will help you to prepare for the exams and get more marks.

Life Processes MCQ Questions Class 10 Science

Please see solved MCQ Questions for Life Processes in Class 10 Science. All questions and answers have been prepared by expert faculty of standard 10 based on the latest examination guidelines.

Question. The green colour of plants is due to the presence of
(a) chlorophyll
(b) carotene
(c) xanthophyll
(d) starch

Question. Blood from superior vena cava flows into
(a) right atrium
(b) right ventricle
(c) left atrium
(d) left ventricle

Question. When air is blown from mouth into a test-tube containing lime water, the lime water turned milky due to the presence of
(a) oxygen
(b) carbon dioxide
(c) nitrogen
(d) water vapour

Question. Choose the correct path of urine in our body.
(a) Kidney ureter urethra urinary bladder
(b) Kidney urinary bladder urethra ureter
(c) Kidney ureter urinary bladder urethra
(d) Urinary bladder kidney ureter urethra

Question. The internal (cellular) energy reserve in autotrophs is
(a) glycogen
(b) protein
(c) starch
(d) fatty acid

Question. Which is the correct sequence of parts in 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

Question. Single circulation, i.e., blood flows through the heart only once during one cycle of passage through the body, is exhibited by
(a) Labeo, Chameleon, Salamander
(b) Hippocampus, Exocoetus, Anabas
(c) Hyla, Rana, Draco
(d) Whale, Dolphin, Turtle

Question. Name a circulatory fluid in the human body other than blood.
(a) Platelets
(b) RBC
(c) Lymph
(d) Plasma

Question. Name the tube which connects the kidneys to the urinary bladder.
(a) Urethra
(b) Nephron
(c) Tubule
(d) Ureter

Question. Lack of oxygen in muscles often leads to cramps among cricketers. This results due to
(a) conversion of pyruvate to ethanol
(b) conversion of pyruvate to glucose
(c) non conversion of glucose to pyruvate
(d) conversion of pyruvate to lactic acid

Question. The opening and closing of the stomatal pore depends upon
(a) oxygen
(b) temperature
(c) water in guard cells
(d) concentration of CO₂ in stomata

Question. The inner lining of stomach is protected by one of the following from hydrochloric acid.
Choose the correct one.
(a) Pepsin
(b) Mucus
(c) Salivary amylase
(d) Bile

Question. Rings of cartilage present in the throat ensure that
(a) air is filtered
(b) air is at room temperature
(c) air passage does not collapse
(d) air is free of microbes

Question. Which of the following organisms absorbs nutrition with haustoria?
(a) A carnivore
(b) A herbivore
(c) A parasite
(d) A saprophyte

Question. Raw materials required in the autotrophic mode of nutrition involves:
(i) Carbon dioxide and water (ii) Chlorophyll
(iii) Nitrogen (iv) Sunlight
(a) (i), (ii) and (iii)
(b) (i) and (ii)
(c) (i), (ii) and (iv)
(d) All (i), (ii), (iii) and (iv)

Question. The enzymes in pancreatic juice help in the digestion of
(a) fats and carbohydrates
(b) proteins and fats
(c) proteins and carbohydrates
(d) proteins, fats and carbohydrates

Question. Which of the following help in protecting the inner lining of the stomach from the harmful effect of hydrochloric acid?
(a) Mucus
(b) Pepsin
(c) Trypsin
(d) Bile

Question. Sometimes we get painful cramps in our leg muscles after running for a long time due to the accumulation of
(a) hydrochloric acid
(b) fat
(c) carbon dioxide
(d) lactic acid

Question. The vein which brings clean blood from the lungs into the heart is known as
(a) pulmonary vein
(b) hepatic vein
(c) superior vena cava
(d) pulmonary artery

Question. Movement of the synthesized products from the leaves to the roots and other parts of a plant’s body takes place through the phloem. This process is known as
(a) translocation
(b) transpiration
(c) transportation
(d) excretion

Question. Which element is used in the synthesis of proteins?
(a) Hydrogen
(b) Oxygen
(c) Nitrogen
(d) Carbon dioxide

Question. The contraction and expansion movement of the walls of the food pipe is called
(a) translocation
(b) transpiration
(c) peristaltic movement
(d) digestion

Question. The exit of unabsorbed food material is regulated by
(a) liver
(b) anus
(c) small intestine
(d) anal sphincter

Question. Temporary finger like extensions on Amoeba are called
(a) cell membrane
(b) cell wall
(c) pseudopodia
(d) cilia

Question. During deficiency of oxygen in tissues of human beings, pyruvic acid is converted into lactic acid in the
(a) cytoplasm
(b) chloroplast
(c) mitochondria
(d) golgi body

Question. Which among the following procedures is used for cleaning the blood of a person by separating the waste substance from it?
(a) Kidney transplant
(b) Blood transfusion
(c) Dialysis
(d) Hydrolysis

Question. During respiration exchange of gases take place in
(a) trachea and larynx
(b) alveoli of lungs
(c) alveoli and throat
(d) throat and larynx

Question. In which of the following vertebrate group/groups, heart does not pump oxygenated blood to different parts of the body?
(a) Pisces and amphibians
(b) Amphibians and reptiles
(c) Amphibians only
(d) Pisces only

Question. The excretory unit of the human excretory system is known as
(a) nephridia
(b) neuron
(c) nephron
(d) kidneys

Question. Plants use the energy stored in ATP to accomplish the process of transportation of
(a) water and minerals
(b) oxygen
(c) water, minerals and food
(d) food

Question. Blood consist of what fluid medium?
(a) Lymph
(b) Platelets
(c) Plasma
(d) All of these

Question. Which is the first enzyme to mix with food in the digestive tract?
(a) Pepsin
(b) Cellulase
(c) Amylase
(d) Trypsin

Question. In which part of the alimentary canal food is finally digested?
(a) Stomach
(b) Mouth cavity
(c) Large intestine
(d) Small intestine

Question. One cell-thick vessels are called
(a) arteries
(b) veins
(c) capillaries
(d) pulmonary artery

Question. Which of the following are energy foods?
(a) Carbohydrates and fats
(b) Proteins and mineral salts
(c) Vitamins and minerals
(d) Water and roughage

Question. In which mode of nutrition an organism derives its food from the body of another living organism without killing it?
(a) Saprotrophic nutrition
(b) Parasitic nutrition
(c) Holozoic nutrition
(d) Autotrophic nutrition

Question. Which of these juices is secreted by pancreas?
(a) Trypsin
(b) Pepsin
(c) Bile juice
(d) Both (a) and (b)

Question. Lipase acts on
(a) amino acids
(b) fats
(c) carbohydrates
(d) all of these

Question. The mode of nutrition found in fungi is
(a) parasitic nutrition
(b) holozoic nutrition
(c) autotrophic nutrition
(d) saprotrophic nutrition

Question. Roots of the plants absorb water from the soil through the process of
(a) diffusion
(b) transpiration
(c) osmosis
(d) none of these

Question. The element used in the synthesis of proteins is
(a) Hydrogen
(b) Oxygen
(c) Nitrogen
(d) Carbon dioxide

Question. The part of an alimentary canal receives bile from the liver is
(a) Stomach
(b) Small intestine
(c) Large intestine
(d) Oesophagus

Question. A gland not associated with the alimentary canal is
(a) Liver
(b) Salivary glands
(c) Pancreas
(d) Adrenal

Question. The nutrient that are chiefly digested in the stomach are
(a) Carbohydrates
(b) Proteins
(c) Fats
(d) Lipids

Question. The part of the digestive system where no digestion takes place is
(a) Ileum
(b) Stomach
(c) Mouth
(d) Oesophagus

Question. The enzyme Pepsin is inactive in stomach without the presence of
(a) Nitric acid
(b) Hydrochloric acid
(c) Acetic acid
(d) Butyric acid

Question. Villi present on the inner lining of the intestinal wall
(a) Secretes enzymes for digestion
(b) Secretes hormones
(c) Decreases the surface area for absorption
(d) Increases the surface area for absorption

Question. Choose the function of pancreatic juice from the following
(a) Trypsin digests proteins and lipase carbohydrates
(b) Trypsin digests emulsified fats and lipase proteins
(c) Trypsin and lipase digest fats
(d) Trypsin digests proteins and lipase emulsified fats

Question. Large intestine in man mainly carries out for
(a) Absorption
(b) Assimilation
(c) Digestion of fats
(d) Digestion of carbohydrates

Question. The sphincter muscles that help in regulating the exit of food from stomach into the small intestine is
(a) Pyloric sphincter
(b) Ileocecal sphincter
(c) Cardiac sphincter
(d) Anal sphincter

Question. The exit of unabsorbed food material is regulated by
(a) Pyloric sphincter
(b) Anus
(c) Small intestine
(d) Anal sphincter

Question. The fermentation of glucose by yeast normally yields
(a) Alcohol, CO₂ and 36 ATP
(b) CO₂, H₂O and 36 ATP
(c) Alcohol, CO₂ and 2 ATP
(d) Lactic acid, CO₂ and 2 ATP

Question. The organism that can live without oxygen of air is
(a) Amoeba
(b) Sheep
(c) Yeast
(d) Leech

Question. When ATP is brokendown using water, energy is released which is equivalent to
(a) 60.5 KJ/mol
(b) 30.5 KJ/mol
(c) 36.5 KJ/mol
(d) None of these

Question. Respiratory pigment in human body is
(a) Chlorophyll
(b) Water
(c) Blood
(d) Haemoglobin

Question. Pick out the metal that is associated with haemoglobin
(a) Aluminum
(b) Iron
(c) Potassium
(d) Calcium

Question. A student sets up an experiment to study human respiration using lime water, test tube and a straw. Lime water is colourless in the absence of CO2 and is milky in its presence. The student fills a freshly prepared limewater in a test tube and blows air through straw into the limewater. It was observed that the solution turns cloudy as shown.
What can be evaluated from this observation?    

(a) Oxygen is exhaled during respiration.
(b) Water vapours are produced during respiration.
(c) Carbon dioxide is exhaled during respiration.
(d) Glucose is produced during respiration.

Question. The image shows the transport of gases in body through heart and lungs.   

Which option correctly shows the transport of oxygen to the cell?
(a) Lungs → pulmonary vein → left atrium → left ventricle → aorta → body cells.
(b) Lungs → pulmonary artery → right atrium → right ventricle → vena cava → body cells.
(c) Lungs → pulmonary artery → left atrium → left ventricle → vena cava → body cells.
(d) Lungs → pulmonary vein → right atrium → right ventricle → aorta → body cells.

Question. The breakdown of pyruvate to give CO2, water and energy takes place in
(a) Chloroplast
(b) Nucleus
(c) Mitochondria
(d) Cytoplasm

Question. Products of anaerobic respiration in muscles are
(a) Lactic acid and energy
(b) Lactic acid, carbon dioxide and energy
(c) Lactic acid, water, carbon dioxide and energy
(d) Lactic acid, water and energy