Nutrition in Amoeba

Q.

(a) Describe the process of nutrition in Amoeba. Draw labelled diagrams to show the various steps in the nutrition in Amoeba.
(b) What is the mode of nutrition in Amoeba known as ?
(c) What is the process of obtaining food by Amoeba called ? What does it mean ?

Q.

Question 1 (e)
Fill in the blanks:
(e) Amoeba digests its food in the __.

Q.

How does an Amoeba engulf the food particle ?

Q.

What is intracellular digestion?

Q.

What substances enter into the food vacuole in Amoeba to break down the food

Q.

From which part of the body, undigested food is egested in Amoeba?

Q.

How is ingestion in paramecium different from ingestion in amoeba?

Q.

What are the functions performed by the cells in Amoeba ?

Q.

Find the correct match.
i. Paramecium - cilia
ii. Euglena - pseudopodia
iii. Amoeba - flagella
iv. Amoeba - cilia

1. i only
2. iii and iv
3. ii and iii
4. iv only

Q.

What is saprozoic nutrition?

Q.

A unicellular animal P having no fixed shape ingests a food particle by forming temporary finger-like projections Q. The food particle is engulfed with a little surrounding water to form a temporary stomach R inside it. The chemicals S from surrounding cytoplasm enter into R and break down food into small and soluble molecules by chemical reactions. The digested food is absorbed directly into the cytoplasm by the process T. The undigested food is thrown out of the body by the rupture of a cell organelle U in a process called V.
(a) Name the unicellular animal P.
(b) What are (i) Q and (ii) R?
(c) Name (i) chemical S, and (ii) process T.
(d) Name (i) organelle U, and (ii) process V.

Q.

If you remove the fimbriae from the bacterial cell, which one of the following will you expect to happen?

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1. The bacteria could no longer swim

2. The bacteria will not adhere to the host tissue

3. Transportation of molecules across the membrane will stop

4. The shape of bacteria will change

Q.

Given below are a set of steps via which amoeba obtains nutrition. Arrange these steps in the correct sequence.

I. Complex substances are broken down into simpler ones.
II. Formation of a food vacuole.
III.Undigested material is moved to the surface of the cell and thrown out.
IV. Temporary finger-like projections of the cell surface fuse over the food particle.

1. IV $\to$ I $\to$ II $\to$ III

2. IV $\to$ II $\to$ I $\to$ III

3. I $\to$ IV $\to$ II $\to$ III

4. I $\to$ II $\to$ IV $\to$ III

Q.

Name an animal whose process of obtaining food is called phagocytosis.

Q.

How are Contractile vacuoles different from other vacuoles?

Q.

How does Amoeba capture its food?

Q.

The process of obtaining food by Amoeba is known as :
(a) dialysis (b) cytokinesis (c) phagocytosis (d) amoebiasis

Q. Choose the correct statements regarding the statements given below.

Statement 1: Cuscuta derives nutrition from plants without killing them.
Statement 2: Yeasts break down the food material outside their body and then absorb the nutrients.

1. Only statement 1 is correct.
2. Both the statements are incorrect.
3. Only statement 2 is correct.
4. Both the statements are correct.

Q.

What are the similarities between nutrition in amoeba and nutrition in paramecium?

1. Both engulf food that comes on their way.

2. Digestion is carried out with help of digestive juices secreted in the food vacuole.

3. Both undergo intracellular digestion.

4. None of the above.

Q.

In which of the following group of organisms, the solid or liquid food is taken inside the body and then digested and absorbed by the cell?

1. Amoeba, Paramecium, Humans
2. Mushroom, Paramecium, Amoeba
3. Humans, Lice, Tapeworm​
4. Paramecium, Amoeba, Cuscuta

Q. 5. How is digestion in amoeba different from that in mushroom?

Q.

Wat is the life span of an amoeba? How is it possible?

Q.

Which of these is FALSE about nutrition in amoeba?

1. Amoeba first breaks down the food into simpler particles and then swallows it

2. The food is swallowed by amoeba creating a food vacuole

3. Digestion of food takes place in an amoeba with the help of digestive juices

4. Amoeba makes use of pseudopodia for movement and to capture food

Q.

Amoeba does not require any respiratory pigment to transport oxygen. The possible reason could be :

1. It being unicellular

2. It being prokaryotic

3. It possessing cilia

4. Presence of pseudopodia

Q.

Question 73
Explain the process of nutrition in Amoeba.

Q. Which of the following organisms derive their nutrition from living plants or animals?

निम्नलिखित में से कौनसा जीव जीवित पादप या जंतुओं से अपना पोषण प्राप्त करता है?

(i) Bread mould (फफूँदी)

(ii) Cuscuta (कस्कुटा)

(iii) Leech (लीच)

(iv) Mushroom (मशरूम)

(v) Yeast (यीस्ट)

(vi) Tape-worm (फीताकृमि)

1. (i), (iii) and (v)
   
   (i), (iii) तथा (v)
2. (ii), (iii) and (vi)
   
   (ii), (iii) तथा (vi)
3. (iii) and (iv) only
   
   केवल (iii) तथा (iv)
4. (i) and (v) only
   
   केवल (i) तथा (v)

Q.

What is the purpose of passive transport?

Q.

How does Amoeba obtain its food?

Q.

Question 55
Match Group (A) with Group (B)

$\begin{array}{cc}Group\left(A\right)& Group\left(B\right)\\ \left(a\right)Autotrophicnutrition& \left(i\right)Leech\\ \left(b\right)Heterotrophicnutrition& \left(ii\right)Paramoecium\\ \left(c\right)Parasiticnutrition& \left(iii\right)Deer\\ \left(d\right)Digestioninfoodvacuoles& \left(iv\right)Greenplant\end{array}$

Q.

Which of the following is true about nutrition in paramecium?

1. Paramecium has a shallow groove called 'Vestibulum' to lead food inside its body.

2. Paramecium senses food and moves in its direction to be able to engulf it.

3. Paramecium undergoes intracellular digestion.

4. Paramecium has holozoic nutrition.