Question 5
Which of these is not related to endoplasmic reticulum?

(a) It behaves as transport channel for proteins between nucleus and cytoplasm
(b) It transports materials between various regions in cytoplasm
(c) It can be the site of energy generation
(d) It can be the site for some biochemical activities of the cell

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Solution

(c) It can be the site of energy generation

The function of the ER is to serve as channels for the transport of materials (especially proteins) between various regions of the cytoplasm or between the cytoplasm and the nucleus. The ER also functions as a cytoplasmic framework providing a surface for some of the biochemical activities of the cell. In the liver cells of the group of animals called vertebrates, the SER helps in the manufacture of fat molecules, or lipids, important for cell function and also SER plays a crucial role in detoxifying many poisons and drugs. Mitochondria are the site of energy generation

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Question 53
Draw a plant cell and label the parts which

(a)Determines the function and development of the cell

(b)Packages materials coming from the endoplasmic reticulum

(c)Provides resistance to microbes to withstand hypotonic external media without bursting

(d) Is the site for many biochemical reactions necessary to sustain life.

(e) Is a fluid contained inside the nucleus

Identify the correct statements related to the uptake of mineral ions

A. The membrane proteins pump ions from soil into the cytoplasm of epidermal cells

B. Transport proteins of endodermal cells act as control points, which adjust the quantity and type of solutes reaching the xylem

C. Root endoderm due to its suberin layer, can not transport ions

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