Plastids

Q. What is cDNA ?

Q. Choose the correct statement(s) regarding phosphorus
I. There is no respiratory release of phosphorus into the atmosphere.
II. There is almost no input of phosphorus from the atmosphere through rainfall.
III. Fossil fuels are a major reservoir of phosphorus.
IV. Decomposition of dead and decayed organic matter releases phosphorus.

1. II and III only
2. I and II only
3. III and IV only
4. I, II and IV only

Q.

Question 43
Tomatoes, carrots and chillies are red in colour due to the presence of one pigment. Name the pigment. Is it a photosynthetic pigment?

Q.

The golgi complex participates in ?

Q. Cell organelle that converts radiant energy into chemical energy.

1. Chloroplast
2. Mitochondria
3. Ribosomes
4. Lysosomes

Q.

How are reserve materials stored in green algae, brown algae, and red algae?

Q. Chloroplast is called as a semi-autonomous organelle because

1. It shows DNA.
2. It showsATP production
3. They inherit from cell to cell
4. They break down into two.

Q. The endosymbiont hypothesis suggests that there are similarities between prokaryotes, mitochondria and chloroplasts like

1. Presence of circular DNA not associated with histones and 70 S ribosomes
2. Presence of circular DNA associated with histones and 70 S ribosomes
3. 50 S ribosomes and DNA
4. 30 S ribosomes and DNA

Q. If you fractionate all the organelles from the cytoplasm of a plant cell, in which one of the following sets of fractions will you find nucleic acids?

1. Nucleus, mitochondria, chloroplast, cytoplasm
2. Nucleus, mitochondria, chloroplast, glyoxysome
3. Nucleus, chloroplast, cytoplasm, and peroxisome
4. Nucleus, mitochondria, chloroplast, Golgi bodies

Q. A feature common to nucleus, chloroplast, & mitochondria is the presence of

1. Lamellae
2. Nucleic acids
3. None of the above
4. Cristae

Q. Are plastids present only in plant cells?

Q.

Which of these is wrongly matched?

1. Chloroplast-Chlorophyll

2. Elaioplast-Starch

3. Chromoplasts-Carotenoids

4. Amyloplasts-Carbohydrate

Q. Assertion (A): Plants absorb mineral nutrients from the soil
Reason (R): The mineral nutrients in the soil are mostly released by the activity of the consumers of the ecosystem

1. Assertion and reason are true, and the reason is the correct explanation of the assertion
2. Assertion and reason are true, and the reason is not the correct explanation of the assertion
3. Assertion is a true statement but the reason is a false statement
4. Assertion and reason are false statements

Q.
In eukaryotic cells, the process indicated by
arrow A occurs in the

1. cytoplasm
2. ribosome
3. nucleus
4. cell membrane

Q. Identify the odd one among the following and justify.

Chloroplast; Mitochondria; Leucoplast; Chromoplast

Q.

What Is The Basis Of The Classification Of Plastids?

Q. Match the following:

$\begin{array}{cc}\text{Plastid}& \text{Role}\\ \text{(i) Chromoplast}& \text{(A) Storage of lipids and oils}\\ \text{(ii) Amyloplast}& \text{(B) Storage of starch and sugar}\\ \text{(iii) Elaioplast}& \text{(C) Shows presence of carotenoid}\\ \text{(iv) Aleuroplast}& \text{(D) Store proteins}\end{array}$

1. (i)-(D), (ii)-(C), (iii)-(A), (iv)-(B)
2. (i)-(C), (ii)-(B), (iii)-(A), (iv)-(D)
3. (i)-(B), (ii)-(C), (iii)-(D), (iv)-(A)
4. (i)-(A), (ii)-(B), (iii)-(D), (iv)-(C)

Q.

What is the meaning of plastids?

Q. Conversion of green coloured tomatoes into red coloured ones involves :

1. Formation of chromoplast from proplastids
2. Formation of chromoplast from chloroplast
3. Destruction of chloroplast and development of chromoplast from leucoplast
4. All of the above

Q.

Question 44
Why do we believe chloroplast and mitochondria to be semi-autonomous organelle?

Q.

Question 39

Are the different types of plastids interchangeable ? If yes, give examples where they are getting converted from one type to another.

Q. Take a clean glass slide and put few drops of water on it. Now place a complete Rheo leaf on water droplets and examine the cells of leaf under the high power of compound microscope. Put a few drops of concentrated salt/sugar solution on the mounted Rheo leaf on the glass slide. Wait for few minutes and again observe the leaf under the high power of microscope.
What will be your observation after few minutes?

1. Cell contents are separated from the cell wall.
2. Cytoplasm along with plasma membrane has come to lie on one side of cell wall.
3. A clear space is seen between the cell wall and protoplast of the cells
4. All of these

Q. What is the function of leucoplasts?

1. To store starch grains, oil drops and protein granules
2. To store glycoprotein
3. To store nucleoprotein
4. To synthesize glycogen

Q. This question consist of two statements, assertion and reason. While answering this question you are required to choose any one of the following five responses.

Assertion: The stromal thylakoids are rich in both PS I and PS II.

Reason: The stroma membranes are rich in ATP synthetase.

1. If both assertion and reason are true but the reason is not the correct explanation of the assertion.
2. If assertion is false but the reason is true.
3. If both assertion and reason are true and the reason is the correct explanation of the assertion.
4. If assertion is true but the reason is false.
5. If both assertion and reason are false.

Q. The endosymbiotic hypothesis suggests that there are similarities between prokaryotes, mitochondria and chloroplasts like:

1. The presence of circular DNA not associated with histones and 70S ribosomes
2. 50S ribosomes and DNA
3. 30S ribosomes and DNA
4. The presence of circular DNA associated with histones and 70S ribosomes

Q. Which of the following is the symplastic pathway for the movement of sucrose from the site of photosynthesis in mesophyll cell into the phloem?

1. Fibers, phloem parenchyma, companion cell, sieve tube
2. Phloem parenchyma, fibers, bundle sheath, tracheids
3. Companion cells, phloem parenchyma, companion cell sieve
4. Bundle sheath, phloem parenchyma, fibers, sieve tube

Q.

Question 37

Is there a species specific or region specific types of plastids? How does one distinguish one form the other?

Q. Grana and stroma lamellae are the parts of

1. Mitochondria
2. Vacuoles
3. Chloroplast
4. Endoplasmic reticulum

Q. Mitochondria are semi autonomous organelles?

Q. Types of leucoplasts are

1. Amyloplasts
2. Chromoplasts
3. Lipidoplasts
4. Proteinoplasts