CBSE Questions for Class 10 Biology Life Processes Quiz 8 - MCQExams.com

Saliva contains enzyme:
  • Enterokinase
  • Ptyalin/amylase
  • Chymotrypsin
  • Lipase
End products of aerobic respiration are
  • Sugar and oxygen
  • Water and energy
  • Carbon dioxide, water and energy
  • Carbon dioxide and energy
Aerobic respiration occurs in 
  • Mitochondria
  • Peroxisomes
  • Cytoplasm
  • Cytoplasm and mitochondria
Which of the following process can be skipped if someone has taken glucose directly?
  • Digestion
  • Absorption
  • Ingestion
  • Assimilation
Which of the following statements is correct with respect to respiration?
  • Respiration can occur only when oxygen is available.
  • There are two types of respiration.
  • Respiration is also known as breathing.
  • All of the above
Semidigested food that moves down oesophagus is known as
  • Bolus
  • Chyme
  • Rugae
  • Protein
Arrange the stages of nutrition of amoeba.
a) Ingestion
b) Engulfment
c) Digestion
d) Excretion
e) Absorption 
  • b,a,c,e,d
  • a,b,c,e,d
  • b,a,c,d,e
  • c,d,a,b,e
The process used in separating larger particles from smaller ones in a solution is called:
  • Chromatography
  • Dialysis
  • Osmosis
  • Diffusion
The two lower chambers of the heart are called ________.
  • Atria
  • Ventricles
  • Valves
  • Pulmonary chambers
  • Sockets
  • Aorta
The digestive enzymes secreted in the food vacuole of Paramoecium helps in:
  • Locomotion
  • Engulfment of food particle
  • Digestion of complex food material into simpler ones
  • Excretion of the digested food
Ventricle is thick walled as compared to atrium, because:
  • It is present on the posterior side.
  • It pumps blood.
  • It receives blood from the atrium.
  • None of the above
Match the column.
Column IColumn II
aSuperior Vena CavapCarries deoxygenated blood to lungs
bInferior Vena CavaqCarries oxygenated blood from lungs
cPulmonary ArteryrBrings deoxygenated blood from lower parts of body to right atrium
dPulmonary veintBrings deoxygenated blood from upper parts of body into right atrium
  • a - q, b - t, c - r, d - p
  • a - t, b - p, c - q, d - r
  • a - t, b - r, c - p, d - q
  • a - t, b - p, c - r, d - q
Choose the correct function of lymph.
  • Carries digested and absorbed fat from the intestine
  • Returns RBCs and WBCs to lymph nodes
  • Drains excess fluid from extra cellular space back into the blood
  • Both A and D

Arteries have________than veins.

  • Thicker walls.
  • More blood cells.
  • More plasma.
  • Larger cavity.
Arteries are thick walled, because
  • They are without valves.
  • They have to pump blood.
  • The blood flows with high pressure in them.
  • They have oxygenated blood.
Which of the following is the major excretory organ in humans? 
  • Kidney
  • Small intestine
  • Large intestine
  • Heart
Dialysis fluid contains all the constituents as in plasma except:
  • Electrolytes
  • Proteins
  • Nitrogenous wastes
  • All the above
The engulfment of food in amoeba is known as
  • Excretion
  • Phagocytosis
  • Respiration
  • All of the above
Which of the following helps in the release of water vapour in the plant?
  • Stomata
  • Phloem
  • Flower
  • Roots
The mode of nutrition in amoeba is:
  • Heterotrophic
  • Autotrophic
  • Cannot be determined
  • None of the above
Which of the following statement proves that guard cell is a living cell?
  • It has a nucleus.
  • It has chloroplast.
  • It is a bean shaped cell.
  • Both A and B
Which of the following structures helps in the release of excretory gases in plants? 
  • Root hair
  • Stomata
  • Lenticels
  • Both B and C
The cells surrounding the stomata are known as
  • Guard cells
  • Subsidiary cell
  • Stoma
  • None of the above
The tubes which connect the kidney and urinary bladder is known as
  • Ureter
  • Kidney
  • Urethra
  • None of the above
The function of part labelled as C is:
672392_2163ad5040994413b4a984329e9480a3.png
  • Storage of blood
  • Storage of urine
  • Storage of food
  • Filtration of urine
The bean shaped cells of the stomata are known as
  • Guard cell
  • Stoma
  • Epidermis
  • None of the above
The part labelled as A in the given image helps in the
672385_2e9d4ed216cc4819a231e4e490a07d44.png
  • Removal of waste from the blood
  • Gaseous exchange
  • Circulation of blood
  • Control and coordination 
Which among the following carries oxygen to different parts of the body?
  • Plasma
  • Lymph
  • Blood
  • Serum.
The part of the cardiovascular system that transports oxygen-depleted blood from the heart to the lungs brings oxygenated blood back to the heart is:
  • Pulmonary circulation
  • Coronary circulation
  • Systemic circulation
  • Single circulatory system.
Vasoconstriction mainly causes
  • Increase in heart beat
  • Decrease in heart beat
  • Increase in blood pressure
  • Decrease in blood pressure.
A leaf has labeled as A  has 20 stomata. A leaf labeled as B has 10 stomata. Which of the following statement defines the percentage of water vapour released by both the leaves?
  • Leaf A releases more water vapour than leaf B.
  • Leaf A releases less water vapour than leaf B.
  • Leaf A equals leaf B
  • None of the above
What is true about vein?
  • All veins carry deoxygenated blood.
  • All veins carry oxygenated blood.
  • They carry blood from organs towards heart.
  • They carry blood from heart towards the organs.
Artery is a vessel that carries blood
  • Towards the heart
  • Away from heart
  • Away from tissue
  • Towards the liver
Which one indicates hypertension
  • 140/100
  • 120/85
  • 110/70
  • 90/60.
Hypotension may not be due to _______.
  • Loss of fluid
  • Loss of blood
  • Endocrine disorder
  • Excessive fluid intake
During systole of ventricle
  • Blood enters the heart
  • Blood leaves the heart
  • Blood leaves the ventricle
  • Blood enters lungs
Which one represents pulmonary circulation?
  • Left auricle (oxygenated blood) $$\rightarrow$$ lungs (deoxygenated blood) $$\rightarrow$$ Right auricle
  • Left auricle (deoxygenated blood) $$\rightarrow$$ lungs (oxygenated blood) $$\rightarrow$$ Right auricle
  • Left auricle (oxygenated blood) $$\rightarrow$$ lungs (deoxygenated blood) $$\rightarrow$$ Left auricle
  • Right auricle (deoxygenated blood) $$\rightarrow$$ lungs (oxygenated blood) $$\rightarrow$$ Left auricle
Blood vessel which brings oxygenated blood to left auricle is:
  • Anterior vena cava
  • Posterior vena cava
  • Pulmonary vein
  • Pulmonary artery
Consider the following statements: 
The force that blood exerts force against the wall of a vessel is called blood pressure. 
The pressure of blood inside the artery during contraction is called systolic pressure and pressure in an artery during relaxation is called diastolic pressure. 
Blood pressure is measured with an instrument called sphygmomanometer.
Which of the statements given above are correct?
  • 1 and 2
  • 1 and 3
  • 2 and 3
  • All of the above 
Sphygmomanometer is an instrument that is used to record:
  • Systolic pressure
  • Diastolic pressure
  • Cardiac output
  • Both A and B.
If blood pressure reads 140 systole and 90 diastole, the condition is called
  • Hypertension
  • Normal
  • Hypotension
  • Ischemia
The most important process for the existence of life on Earth is:
  • Locomotory movements of animals
  • Respiration of animals
  • Photosynthesis by plants
  • Communication in animals
It is a byproduct during carbon assimilation by a plant.
  • $$CO_2$$
  • Cellular material
  • Energy end water
  • Oxygen
Site of actual diffusion of $$O_{2}$$ and $$CO_{2}$$ is  ______________.
  • Conduction part
  • Exchange part
  • Inhaling part
  • Both A and B
Arrange the following events in correct sequence, starting immediately after deoxygenated blood has entered in the heart.
Right atrium contracts 
Semilunar valves open
Right ventricle contracts
4. Tricuspid valves close
  • 1 $$\rightarrow$$ 3 $$\rightarrow$$ 4 $$\rightarrow$$ 2
  • $$\rightarrow$$ 4 $$\rightarrow$$  3 $$\rightarrow$$  2
  • $$\rightarrow$$  1 $$\rightarrow$$  3 $$\rightarrow$$  2
  • $$\rightarrow$$  3 $$\rightarrow$$  1 $$\rightarrow$$  2
Choose the correct alternative in the following statements.
Pulmonary vein carries:
  • Oxygenated blood
  • Deoxygenated blood
  • Glucose-rich blood
  • $$CO_2$$ laden blood
Read the following statements:
(A) Nasal chamber opens into the nasopharynx which is a portion of the pharynx.
(B) Larynx produces sound during inspiration as well as expiration.
(C) During swallowing gullet can be covered by a thin elastic cartilaginous flap called epiglottis.
(D) Trachea is get divided at the level of the 6th thoracic vertebra into right and left primary bronchi..
(E) The branching network of bronchi, bronchioles, and alveoli comprise the lungs.
How many statements are not correct?
  • 2
  • 3
  • 4
  • 1
The steps of the digestive process are listed below but not in correct order.
(i) Water and vitamin absorption begins.
(ii) Food is liquefied; breakdown of proteins begins.
(iii) Food is moistened; breakdown of starch begins.
(iv) Proteins, carbohydrates, and fats break down; nutrients are absorbed into the bloodstream.
Select the option that gives the correct order of these events as food passes through the human digestive tract.
  • (ii), (iv), (i), (iii)
  • (iv), (ii), (iii), (i)
  • (i), (iii), (ii), (iv)
  • (iii), (ii), (iv), (i)
The specific function of light energy in the process of photosynthesis is to:
  • Reduce carbon dioxide
  • Synthesize glucose
  • Activate chlorophyll
  • Split water molecule
During photosynthesis, the oxygen in glucose comes from
  • $$CO_2$$
  • Water
  • Both $$CO_2$$ and water
  • Oxygen via air
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