Structure of Chloroplasts

Q.

Mitochondria and chloroplast are:

(i) semi-autonomous organelles

(ii) formed by division of pre-existing organelles and they contain DNA but lack protein-synthesizing machinery.

Which of the following statements are correct?

1. Statement (i) is true but (ii) is false
2. Statement (ii) is true but (i) is false
3. Both statements are true
4. Both statements are fals

Q.

Assertion (A): Mitochondria and chloroplasts are semi-autonomous organelles.

Reason (R): They are formed by the division of pre-existing organelles, and also contain DNA but lack protein synthesising machinery.

1. Both A and R are correct and R is the correctexplanation of A
2. Both A and R are incorrect
3. Both A and are correct, but R is not the correctexplanation of A
4. A is correct, but R is incorrect

Q.

What are Pyrenoids?

Q.

Which cell organelle is the site for photosynthesis?

Q.

Mention the function of chromoplasts.

Q.

The reaction-center chlorophyll of photosystem I is known as P700 because

1. there are 700 chlorophyll molecules in the center.

2. this pigment is best at absorbing light with a wavelength of 700 nm.

3. there are 700 photosystem I components to each chloroplast

4. it absorbs 700 photons per microsecond.

Q. ″Proteins icebergs in a sea of lipids” is stated by

1. Micellar Model
2. Lamellar Model
3. Unit-membrane Model
4. Fluid-Mosaic model

Q.

Physical basis of life is

1. Cytoplasm

2. Nucleoplasm

3. Protoplasm

4. Endoplasm

Q.

Name and discuss the various component of photosynthesis.

Q. Membranes surrounding the ovum from outside to inside are:

1. corona radiata, zona pellucida, vitelline membrane
2. zona pellucida, corona radiata, vitelline membrane
3. vitelline membrane, zona pellucida, corona radiata
4. zona pellucida, vitelline membrane, corona radiata

Q.

The metallic element present in chlorophyll is.

1. Hg

2. Fe

3. Mg

4. Ni

Q. Identify the structures present in the following image.

1. (i)-inner membrane, (ii)-lumen, (iii)-thylakoid, (iv)-oxysomes
2. (i)-outer membrane, (ii)-stroma, (iii)-thylakoid, (iv)-granum
3. (i)-inner membrane, (ii)-intermembrane space, (iii)-thylakoid, (iv)-oxysomes
4. (i)-outer membrane, (ii)-lumen, (iii)-thylakoid, (iv)-stromal lamella

Q.

Which structure in plant cells traps light energy?

Q.

Which of the following organelles contain circular DNA?

1. Peroxisomes and Mitochondria

2. Mitochondria and Golgi complex

3. Chloroplasts and Lysosomes

4. Mitochondria and Chloroplast

Q. Select the incorrect statement.

1. The chloroplasts are generally smaller than mitochondria
2. Both chloroplasts and mitochondria contain an inner and an outer membrane
3. Both chloroplasts and mitochondria can produce most of their proteins
4. Both chloroplasts and mitochondria contain DNA

Q.

Where are most Of The Chloroplasts Of Green Plants Found?

Q.

A sectional view of the chloroplast is given below. Choose the correct statement for A and B?

1. A - Envelope of chloroplast possess fully permeable membrane;
   B - DNA
2. A - Thylakoids arearranged in stacks like the piles of coins called grana;
   B - Possess the enzyme required for protein and carbohydrate synthesis
3. A - The DNA of the chloroplast are single standard circular DNA
   B - Matrix
4. A - structure is arranged is stacks like the piles of coins called stroma.
   B - DNA

Q.

Photosynthesis stops to occur over the temperature of 35C.

1. True
2. False

Q. Which layer of the Graafian follicle is acellular?

1. Follicular antrum
2. Zona pellucida
3. Granulosa
4. Theca interna

Q. Most abundant organelles of the cell are

1. Mitochondria
2. Plastids
3. Microbodies
4. Ribosomes

Q. In a chloroplast, little stacks of membranous sacs are called _____. Each individual sac is called a ______.

1. granum, thylakoid
2. thylakoid, granum
3. thylakoid, lamellae
4. thylakoid, stroma

Q. The algae like Ulothrix and Spirogyra takes essential minerals and water by

1. general body surface
2. Holdfast
3. nucleus
4. chloroplast

Q. Which cell organelle is called the 'Kitchen of the cell'?

1. Mitochondria
2. Ribosome
3. Chloroplast
4. Golgi body

Q.

Plastids are found only in plant cells.

1. True
2. False

Q.

Do algae contain chloroplast?

Q. Assertion :Mitochondria and chloroplasts are semi-autonomous organelles. Reason: They are formed by division of pre-existing organelles as well as contain DNA but lack protein synthesizing machinery.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
3. Assertion is correct but Reason is incorrect.
4. Both Assertion and Reason are incorrect.

Q. True or False Questions:

Outer and inner membranes of chloroplast have chlorophyll pigment.

Q. Which organelle is known as the "Kitchen of the cell"?

1. Mitochondria
2. Endoplasmic reticulum
3. Chloroplast
4. Golgi apparatus

Q.

Question 15
Examine the figure

(a) Is this struture present in animal cell or plant cell?

(b) Can these be passes on to the progeny? How?

(c) Name the metabolic processes taking place in the places marked (A) and (B).

Q.

State the main function of thylakoids.