CBSE Class 10 Biology Life Processes Nutrition Worksheet Set 02

 

Assertion and Reason Type MCQs :

Following questions consists of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
A. Both assertion and reason are true, and reason is the correct explanation of assertion.
B. Both assertion and reason are true, but reason is not the correct explanation of assertion.
C. Assertion is true but reason is false.
D. Assertion is false and reason is true.

Question. Assertion : mammals and birds have four chambered heart .
Reason : mammals and birds are warm blooded.

Answer: A

Question. Assertion : the left atrium and left ventricle are completely separated from theright atrium and the right ventricle.
Reason : oxygenated and deoxygenated blood never mix with each other inside the heart.

Answer: A

Question. Assertion : a mammal has double circulation .
Reason : higher energy need due to endothermy.

Answer: A

Question. Assertion : Chyme is the food which enters into the intestine from stomach.
Reason : Chyme is acidic in nature.

Answer: A

Question. Assertion : kidneys perform a dual function in our body.
Reason: selective reabsorption occurs in the glomerulus.

Answer: C

Question. Assertion: At high altitudes the pressure of oxygen falls, inside lungs.
Reason: Oxygen is absorbed very quickly from alveoli to increase breathing.

Answer: A

Question. Assertion : arteries always carry oxygenated blood.
Reason: arteries transport blood from the heart to different parts of the body.

Answer: A

Question. Assertion: Tracheal cartilage is present in the throat.
Reason: The larynx plays an important role in human speech.

Answer: B

Question. Assertion : Anaerobic respiration requires more energy as compared to aerobic respiration.
Reason : Mitochondria is the power house of the cell.

Answer: D

 

IV. Blood transport food, Oxygen and waste materials in our bodies. It consists of plasma as a fluid medium. A pumping organ [heart]is required to push the blood around the body.The blood flow through the chambers of heart in a specific manner and direction .While flowing throughout the body, blood exert a pressure against the wall or a vessel.

Question. Which of the following statements are true about human heart ?
A.It is a hollow muscular organ
B. It is four chambered having three auricles and one ventricle.
C. It has different chambers to prevent Oxygen rich blood from mixing with the blood containing Carbondioxide
D. BOTH A & C

Answer: D

Question. Study the table below and select the row that has correct information . 

BODY FLUID	CONTENTS
A. Blood	plasma + RBC+ WBC+platelets
B. Plasma	Blood -- RBC
C. Lymph	Plasma +RBC
D. Serum	Plasma + RBC +WBC

Answer: A

Question. Oxygenated blood from lungs enters left atrium through
A. vena cava
B. pulmonary artery
C. pulmonary vein
D. Aorta

Answer: C

Question. The rate of blood flow in the capillaries is very low because capillaries are
A. very narrow and have high resistance
B. Much wide and have low resistance
C. Very narrow and have low resistance
D. Much wide and have high resistance

Answer: A

II. Our body needs to remove the wastes that build up from cell activities and from digestion . If these wastes are not removed , then our cells can stop working and we can get very sick.The organs of excretory system consists of a pair of kidneys, a pair of ureters , a urinary bladder and a urethra.Each kidney is made up of nearly one million complex tubular structures called nephrons. The formation of urine involves various processes that takes place in the different parts of the nephrons. Each nephron consists of a cup- shaped upper end called Bowman’s capsule containing a bunch of capillaries called glomerulus. Bowman’s capsule leads to tubular structure,proximal convoluted tubule,loop of Henle and distal convoluted tubule which ultimately joins the collecting tubule.

Question. The out line of principal events of urination is given below in random order.
I) stretch receptors on the wall of urinary bladder send signals to the CNS.
II) The bladder fills with urine and become distended.
III) Micturition
IV) CNS passes on motor messages to initiate the contraction of smooth muscles of bladder and simultaneous relaxation of urethral sphincter. The correct sequence of the events is
A. I → II → III→ IV
B. IV → III → II→ I
C. II → I→ IV → III
D. III → II→ I→ IV

Answer: C

Question. Urine formation occurs through
A. Ultrafiltration,reabsorption,secretion and osmosis.
B. secretion,osmosis,ultrafiltration and reabsorption.
C. only filtration and absorption .
D. only osmosis and secretion.

Answer: A

Question. The following substances are the excretory products in animals. Choose the least toxic form.
A. Urea
B.Uric acid
C. Ammonia
D. Carbondioxide

Answer: B

Question. Glomerular filtrate is first collected by
A. Distal convoluted tubule
B. proximal convoluted tubule
C. Bowman’s capsule
D. loop of Henle

Answer: C

 

1 What is life process? 

 

2 Name the type of nutrition

 

a) Fungi like bread mould , yeast , mushroom breakdown the food materials outside the body and absorb it.

 

b) Cuscuta , lices and ticks derive nutrition from plants or animals without killing them.

 

3 Name the stored form of carbohydrate in animals and plants. 

 

4 In the experiment “Light is essential for photosynthesis” why do the uncovered part of the leaves turn blue black after putting iodine solution?

 

5 Small intestine is the site of complete digestion of carbohydrate, protein and fat. Name the end products of their digestion.

 

6 Leaves of a healthy potted plant were coated with Vaseline to block the stomata. Will this plant remain healthy for long? State three reason for your answer.

 

7 What are the major events occurring during the process of photosynthesis? 

 

8 Chewing a piece of bread in the mouth for a period of time makes it sweeter. Give reason.

9 Which digestive secretion does not contain any enzyme but is very important in the process of digestion. Comment on it.

 

10 Why is small intestine in herbivores longer than in carnivores? 

 

11 Explain the mode of feeding in amoeba. Draw diagrams to illustrate 

 

12 Match the following pair of statements (associated with an experiment in photosynthesis) and place them in the correct order in which they occur

 

 

13 What is peristalsis? . Explain both mechanical as well as the chemical part of digestion of food in the mouth of man.

 

14 Villi are richly supplied with blood vessels and take the absorbed food to each every cells of the body where it is utilized. Mention the name of the major absorbed nutrients and their utilization.

 

15 Explain the process of digestion of food in the stomach. Briefly mention the role of hydrochloric acid in the stomach.

 

16 What is emulsification? Explain the process of fat digestion in the gut of man.

 

17 Below is a diagram of the human digestive system .Label all the parts. Also write the letter and name the part of the digestive system where ever applicable

 

 

I) where is Bile

 

a) Made?

 

b) Temporarily stored

 

c) Mixed with food

 

d) What does bile do?

 

II) Where is Trypsin(enzyme)

 

a) Made?

 

b)Name the substrate

 

c) Write the end product

 

 

1 Mention how organisms like bread mould and mushrooms obtain their food 

 

2 Name the enzyme present in the saliva. Mention its role in food digestion . 

 

3 a) Draw a diagram of the human alimentary canal

 

b) Label Liver , Gall Bladder , Pancreas and Colon on the diagram drawn

 

c) State the function of trypsin (present in pancreatic juice) during digestion process