What is the function of Phosphatidylcholine in multienzyme mixed-function oxidase system, located in the endoplasmic reticulum?

Consider the following statements regarding Endoplasmic Reticulum: 1. Endoplasmic Reticulum is to act as channels for the transport of materials between different regions of the cytoplasm. 2. The Smooth endoplasmic reticulum helps in the manufacture of fat molecules, or lipids. 3. Ribosomes attached to the surface of the rough endoplasmic reticulum. Which of the statements given above is/are correct?

A

1 and 2 only

B

2 and 3 only

C

1 and 3 only

D

1, 2 and 3

What are the names of the 3 protein involve in multienzyme mixed-function oxidase system, located in the endoplasmic reticulum?

A

Heme protein, flavoprotein, phosphatidylcholine

B

Heme protein, flavoprotein, retinal protein

C

Heme protein, retinal protein, phosphatidylcholine

D

Retinal protein, flavoprotein, phosphatidylcholine

The membranes of rough endoplasmic reticulum (RER) and smooth endoplasmic reticulum (SER) are continuous.

A

True

B

False

What is the function of a flavoprotein, located in the endoplasmic reticulum?

A

Oxidising the substrate

B

Reducing the cytochrome-450 to the ferrous form

C

Facilitate electron transfer from NADPH to cytochrome 450

D

Facilitate electron transfer from cytochrome 450 to NADPH

The signal sequence that determines whether a protein will be synthesized on a free ribosome or ribosome attached to endoplasmic reticulum is located at _______

A

N-terminal

B

C-terminal

C

hydrophobic tail

D

hydrophilic tail

Consider the following pairs. S. No Cell Organelle Function 1. Endoplasmic Reticulum as channels for the transport of materials (especially proteins) between various regions of the cytoplasm 2. Golgi Apparatus responsible for packaging proteins into vesicles prior to secretion 3. Lysosomes they break down excess or worn-out cell parts Which among the above is/are correct pairs?

A

1 and 2 only

B

2 and 3 only

C

1, 2 and 3

D

1 and 3 only

The endoplasmic reticulum

A

Is a complex system of intracellular tubules

B

Has a membrane structure similar to the cell membrane

C

Is associated with ribonucleoprotein

D

Is connected to the nuclear membrane through trans phase

E

Is well developed in non-secretory cells

Which one of the following functions is not carried out by smooth endoplasmic reticulum?

A

Transport of materials

B

Synthesis of lipid

C

Synthesis of protein

D

Synthesis of steroid hormone

The Rough Endoplasmic Reticulum composed of - Cisternae Tubules Vesicles

A

Only I & II

B

Only II & III

C

Only I & III

D

All I, II, III

A protein is synthesized in the endoplasmic reticulum bound ribosomes and it targets to the inner thylakoid space of chloroplast. How many double-layered membranes layers it has to pass to reach its destination?

A

2

B

3

C

4

D

5

What is the function of Phosphatidylcholine in multienzyme mixed-function oxidase system, located in the endoplasmic reticulum?

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