Plastids

What do we understand by 70s and 80s ribosome

What are plastids and their functions?

Do prokaryotic cells have ribosomes?

The diagram shows a cell from the stem of a plant.

Which of the parts would not be found in a cell from the root?

1. Vacuole

2. Cytoplasm

3. Chloroplast

4. Cell wall

Light energy is converted into chemical energy in the presence of

1. Pyrenoids

2. Chloroplasts

3. Ribosomes

4. Mesosomes

Nerve cells do not divide as they do not contain centrioles so why does plant cells divides (even they do not contain centrioles)?

Part of the chloroplast where the light independent phase of photosynthesis takes place.

1. Thylakoid

2. Stroma

3. Grana

4. Frets

What do amyloplasts store?

1. 23s rRNA
2. 5.8S rRNA
3. 5s rRNA
4. 18s rRNA

Identify labelled structures in the diagram of chloroplast ____.

1. 1=Outer membrane, 2= Inner membrane, 3= Grana, 4= Stroma, 5= Thylakoids

2. 1=Outer membrane, 2= Inner membrane, 3= Thylakoids, 4= Grana, 5= Stroma

3. 1=Inner membrane, 2= Outer membrane, 3= Grana, 4= Thylakoids, 5= Stroma

4. 1=Outer membrane, 2= Inner membrane, 3= Grana, 4= Thylakoids, 5= Stroma

What is the term used for the plastids that are colourless or white in colour?

Name the part in cyanobacteria which contains chlorophyll

1. Golgi apparatus
2. Mitochondria
3. Plastids
4. Ribosomes

Which of the following organelle have their own genetic material?

1. Golgi apparatus

2. Endoplasmic reticulum

3. Lysosome

4. Mitochondria

Why it is called 80s ribosome?

Leaves are green in colour due to the presence of a green pigment called

1. Cytoplasm

2. Nucleoplasm

3. Chlorophyll

4. Centrioles

1. On the stroma lamellae of chloroplast
2. In the inner membrane of chloroplast
3. In the stroma of chloroplast
4. In the thylakoid membrane of chloroplast

1. Three
2. Four
3. Five
4. Two

1. Plastids
2. Golgi bodies
3. Mitochondria
4. Chromosomes

1. Plastids
2. Golgi bodies
3. Mitochondria
4. Chromosomes

1. If the assertion is true but the reason is false.
2. Both the assertion and reason are true and the reason is the correct explanation for assertion.
3. Both the assertion and reason are true and the reason is not the correct explanation for assertion.
4. Both the reason and assertion are false.

1. storage
2. photosynthesis
3. imparts color

Do eukaryotic cells have ribosomes?

The primary function of leucoplasts is ____________.

1. True
2. False

The primary function of leucoplasts is ___ .

1. storage

2. regulation of cell functions

3. protein synthesis

4. photosynthesis

1. Replication site for DNA
2. Energy reservoirs
3. Synthesis of proteins and ribosomes
4. Houses various pigments used in photosynthesis