CBSE Class 10 Biology Life Processes Worksheet Set E

Question. The diagram given below represents the liver, kidney and some associated blood vessels. Identify the vessel from the labelled parts A-D in which the blood will contain the lowest concentration of urea.

(a) A
(b) B
(c) C
(d) D

Answer : C

Question. In amoeba the digestion is intracellular because:
(a) Amoeba is unicellular
(b) Amoeba is multicellular
(c) Amoeba is found in a pond
(d) Amoeba is a microscopic animal

Answer : A

Question. Proteins →^A Peptones 
Identify the enzyme A involved in the above reaction.
(a) Salivary amylase
(b) Bile juice
(c) Pepsin
(d) Lipase

Answer : C

Question. The movement of water and dissolved minerals from the roots of the leaves is best explained by:
(a) Cohesion-tension theory
(b) Translocation
(c) Tensile strength
(d) Pressure-flow hypothesis

Answer : A

Question. Digestion of food in human starts from:
(a) Duodenum
(b) Small intestine
(c) Mouth
(d) Large intestine

Answer : C

Question. Which of the following is used in manufacturing of varnishes, glazing agents, etc?
(a) Tannin
(b) Resins
(c) Essential oil
(d) Rubber

Answer : B

Question. The process of transpiration in plants helps in:
(a) Opening of stomata
(b) Absorption of CO₂ from atmosphere
(c) Upward conduction of water and minerals
(d) Absorption of O₂ from atmosphere

Answer : C

Question. Flame cells are the excretory structures in
(a) arthropods
(b) platyhelminths
(c) anneelids
(d) crustaceans

Answer : B

Question. Choose the incorrect pair.
(a) Ultrafiltration-Glomerulus
(b) Concentration of urine-Collecting duct
(c) Transport of urine-Ureter
(d) Storage of urine-Urinary bladder

Answer : B

Question. An experiment is set up as shown. Flasks 1 and 2 contain lime water. Air is pumped through the flasks.

Answer : B

Question. Digestion of starch starts from:
(a) Stomach
(b) Intestine
(c) Oesophagus
(d) Mouth

Answer : D

Question. Which of the following is not a component of plasma?
(a) water
(b) globulins
(c) fibrinogen
(d) platelets

Answer : D

Question. What is the term used when vessels open and let more blood through?
(a) Vasoconstriction
(b) Vasodilatation
(c) Increased permeability
(d) None of these

Answer : B

Question. The diagram given along side shows the human excretory system. Identify the function of part labelled as X .

(a) To excrete urea
(b) To produce urea
(c) To produce urine
(d) To store urine

Answer : D

Question. In the figure given along side, the structures associated with human kidneys are marked (X,Y and Z ). The relative concentrations of urea in these structures is

(a) X is sometimes higher than Y
(b) Y is always higher than Z
(c) Y is always lower than Z
(d) Z is sometimes lower than X

Answer : C

Question. Dialysing unit (artificial kidney) contains a fluid which is almost same as plasma except that is has
(a) high glucose
(b) high urea
(c) no urea
(d) high uric acid

Answer : C

Question. Observe the figure given below which represents the control of water concentration in the blood.

This is negative feedback system because
(a) It decreases the amount of water in the blood
(b) It increases any change occurring in the amount of water in the blood
(c) It reverses any change occurring in the amount of water in the blood
(d) It increases the amount of water in the blood

Answer : C

Question. Most often during a kidney disorder, the colour of urine changes from yellow to others. A patient is secreting dark colured urine which turns to blue or black later. This is due to the presence of which of the following?
(a) Homogentisic acid
(b) Methaemoglobin
(c) Coproporphyrin
(d) Both (a) and (b)

Answer : A

Question. Veins can be differentiated from arteries because the veins:
(a) have valves
(b) have hard walls
(c) have pure blood in them
(d) have thick walls

Answer : A

Question. The correct order of air reaching from atmosphere to the lungs is through:
(a) external nares, larynx, trachea and air sac
(b) laryx, trachea, air sac and external nares
(c) trachea, air sac, external nares and larynx
(d) air sac, trachea, larynx and external nares

Answer : A

Question. The breakdown of pyruvate to give carbon-di-oxide, water and energy takes place in:
(a) cytoplasm
(b) mitochondria
(c) chloroplast
(d) nucleus

Answer : B

Question. Which one indicates hypertension or high Blood Pressure (BP)?
(a) 120/80
(b) 110/70
(c) 130/80
(d) 140/90

Answer : B

Question. Main excretory organ of humans is
(a) kidney
(b) lungs
(c) skin
(d) liver

Answer : A

Question. Root cap has no role in water absorption because:
(a) It has no direct connection with the vascular system
(b) It has no cells containing chloroplasts
(c) It has no root hairs
(d) It has loosely arranged cells.

Answer : C

Question. Example(s) of liquid waste product in plants is/are
(a) rubber
(b) clove oil
(c) gum
(d) All of these

Answer : D

Question. Figure given below is representing the dialysis machine for removing nitrogenous wastes in patient with a kidney failure.

which substances out of the following in the dialysis fluid should be at a lower concentration than in the blood of patient?
(a) Glucose and urea
(b) Glucose and amino acids
(c) Salts and urea
(d) Glucose and salts

Answer : C

Question. Which substances will be present in the glomerular filtrate from the kidneys of a mammal?

Answer : C

Question. A healthy woman consumes a litre of water at once.
1. How will be the internal environment of her body affected by this?
2. A corrective measure to bring the arising condition to normal state is.
Select the correct option for (i) and (ii) from those given below:

Answer : B

FILL IN THE BLANK :

Question. Largest digestive gland in the human body is .......... .

Answer : liver

Question. Glomerulus occurs in .......... capsule.

Answer : Bowman’s

Question. Man is .......... in nutrition.

Answer : heterotrophic

Question. .......... secretes bile and cholesterol.

Answer : liver

Question. Two .......... are present on both sides of the stomata.

Answer : gard cells

Question. .......... (of bile juice) help in emulsification of fats.

Answer : Bile salts

Question. .......... valve separates the left atrium from the left ventricle.

Answer : tricuspid

Question. Pressure in the arteries during ventricular relaxation is called .......... pressure.

Answer : diastolic

Question. A plant pigment known as .......... is involved in the phenomenon of photoperiodism.

Answer : phytochrome

Question. The structural and functional units of lungs is .......... .

Answer : alveoli

Question. Energy rich compound generated during photosynthesis is .......... .

Answer : ATP

Question. The major function of the .......... blood cells is to transport oxygen.

Answer : red

Question. .......... are regarded as complete photosynthetic units of plants.

Answer : Chloroplasts

Question. .......... movements occur along the gut.

Answer : Peristaltic

Question. Carbonic anchydrase regulates the formation of ..........

Answer : bicarbonates

Question. ......... are the lymphatic capillaries arising from the small intestine.

Answer : lacteals

Question. Ninety percent of the water lost by the plants during transpiration is through the .......... of the leaf.

Answer : stomata

Question. .......... are fat soluble vitamins.

Answer : Vitamin A, D, E and K

Question. .......... node is present near the opening of superior and inferior vena cavae.

Answer : Sinu-auricular

Question. In ......... , waste is removed by diffusion.

Answer : kidney

Question. The thin double-walled sac enclosing the heart is called ..........

Answer : pericardium

Question. Rings of .......... present in trachea, bronchi and bronchioles prevent their collapse when air is not passing through them.

Answer : cartilage

Question. .......... involves the intake of complex material prepared by other organisms.

Answer : Heterotrophic

Question. Blood circulation in humans is called ......... circulation.

Answer : double

Question. The .......... prevents the entry of food into the respiratory tract.

Answer : epiglottis

Question. Principal waste product of metabolism in humans is .........

Answer : Water

Question. .......... are the solid bodies in fruits in which waste is stored.

Answer : raphides

Question. Contraction of heart is known as ..........

Answer : systole

Question. Diffusion is insufficient to meet .......... requirement of multicellular organisms like humans.

Answer : oxygen

Question. .......... veins pour their .......... blood into left atrium.

Answer : Pulmonary, oxygenated

Question. Starch changes blue in .......... solution.

Answer : iodine

Question. Synthesis of ATP using light energy in photosynthesis is .......... .

Answer : photophosphorylation

Question. The functional unit of the mammalian kidney is the .......... .

Answer : nephron

Question. In human, the right lung is .......... lobed.

Answer : 3

Question. Second heart sound heard as .......... is due to closure of .......... valves at the beginning of ventricular diastole.

Answer : Dup/Dubb, semilunar

Question. The semiliquid mixture of partially digested food found in the stomach is called .......... .

Answer : chyme

Question. Kidney eliminate the excretory waste materials as their aqueous solution, called .......... .

Answer : urine