Cell The Unit of Life Test

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Cell The Unit of Life Test - 75

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Weekly Quiz Competition

Question 1
1 / -0

Smooth endoplasmic reticulum is well developed in the cells with synthesis if lipids, cholestrol, steroids and visual pigments in epithelial cells of retina?

A
steroids

B
proteins

C
carbohydrates

D
all of these

Solution

The SER provides surface for the synthesis to lipids including phospholipids, cholesterol, steroid hormones, adrenal corticoid hormones), ascorbic acid and visual pigments.
Question 2
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Consider the following statements and select the correct option.
(A) The endomembrane system includes plasma membrane, ER, Golgi complex, lysosomes and vacuoles.
(B) ER helps in the transport of substances, synthesis of proteins, lipoproteins and glycogen.
(C) Ribosomes are involved in protein synthesis.
(D) Mitochondria help in oxidative phosphorylation and generation of ATP.

A
B, C and D are correct.

B
A alone is correct

C
B alone is correct

D
C alone is correct

Solution

The smooth endoplasmic reticulum forms a continuous system with rough endoplasmic reticulum. It consists of smooth membrane segments and is found in the regions of rich glycogen. It is related with peroxisomes. The functions of SER include mechanical support to the cells, exchange and translocation of substances, synthesis of lipoprotein, glycogen, etc. Ribosomes are involved in protein synthesis along with the RER. Mitochondria help in oxidative phosphorylation and generation of ATP through the Electron Transport Chain.

So the correct option is 'B, C and D are correct'.
Question 3
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Amides are transported to the other parts of the plants via

A
phloem parenchyma

B
phloem companion cells

C
xylem vessels

D
phloem fibre

Solution

Amino acids are transported between different organs through xylem vessels. This redistribution of nitrogen and carbon requires the activity of amino acid transporters in the plasma membrane. In addition, amino acids can be taken up directly by the roots. Amino acid transport has been well characterized in the yeast Saccharomyces cerevisiae, and functional complementation has served as an excellent tool for identifying and characterizing amino acid transporters from plants.
Thus, the correct answer is 'Xylem vessels.'
Question 4
1 / -0

Mechanical support, enzyme circulation, protein synthesis and detoxification of drugs are the functions of __________.

A
Dictyosomes

B
Chloroplast

C
Ribosomes

D
ER

Solution

Endoskeleton refers to the internal membrane system of a cell. The internal membrane system supports the cells like a skeletal system supports the body of an organism. The endomembrane system comprises of endoplasmic reticulum, Golgi apparatus, lysosome, and plasma membrane. Membranes of ER may bear ribosomes, then ER is called granular or rough endoplasmic reticulum (RER). It is abundant in cells engaged in active secretion and protein synthesis. Endoplasmic reticulum without ribosomes is called as smooth endoplasmic reticulum (SER). SER occurs in cells engaged in producing a lot of lipids. SER also takes part in the synthesis of vitamins, carbohydrates and detoxification.
Thus, the correct answer is option D.
Question 5
1 / -0

Cell organelle responsible for autolysis is

A
Dictyosome

B
Lysosome

C
Peroxisome

D
Glyoxysome
Solution
Correct option: B
Explanation:
Autolysis also known as self-digestion, refers to the destruction of a cell through the action of its own enzymes
Lysosomes are known as the suicidal bag of the cell is capable of destroying its own cell in which it is present.
Therefore lysosomes are responsible for autolysis in a cell.
So, the correct option is B.
Question 6
1 / -0

Which of the following is correct for the origin of lysosome (L)?

A
ER $$\rightarrow$$ Golgi bodiesVL

B
Golgi bodies $$\rightarrow$$ ER $$\rightarrow$$ L

C
Nucleus $$\rightarrow$$ Golgi bodies $$\rightarrow$$ L

D
Mitochondira $$\rightarrow$$ ER $$\rightarrow$$ Golgi bodies $$\rightarrow$$ L

Solution

Camillo Golgi observed densely stained reticular structures near the nucleus which were named later as Golgi bodies . Golgi apparatus performs the function of packaging . During this process , membrane bound vesicular structures are formed called as Lysosomes (L) .
So, the correct answer is 'Option A' .
Question 7
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The smooth endoplasmic reticulum is the major site for synthesis of ________

A
proteins

B
lipids

C
carbohydrates

D
vitamins

Solution

The network of tiny tubular structures scattered in the cytoplasm is called the endoplasmic reticulum (ER). The endoplasmic reticulum not bearing is called the smooth endoplasmic reticulum (SER). The SER is the site of lipid synthesis. In animal cells, lipid-like steroidal hormones are synthesized in SER.
So, the correct answer is option B.
Question 8
1 / -0

Plant cells differ from animal cells in having __________.

A
Cell wall

B
Plastids

C
A large central vacuole

D
All of these

Solution

A plant cell has a rigid cell wall on the outside. It has plastids and a centrally located large vacuole. Animal cells do not have cell walls and plastids. The vacuoles are smaller and not centrally placed.
Hence, the correct option is D.
Question 9
1 / -0

______ are granular structures first observed under electron microscope as dense particles by ____ (1955).

A
Ribsomoes, George Palade

B
Ribosomes, Perner

C
Lysomes, de Duve

D
Peroxisomes, de Duve

Solution

Ribosomes are granular structures which were discovered by Robinson and Brown (1953) in plant cell and by Palade )1955) in animal cell.
Palade (1955) also coined the term ribosomes hence, they are also called Palade particles.
Ribosomes occur in both prokaryotic and eukaryotic cells.
Question 10
1 / -0

All plastids have essentially the same structure because __________.

A
They have to perform the same location

B
They are localised in the aerial parts of plants

C
One type of plastid can differentiate into another type of plastid depending upon the cell requirements

D
All plastids have to store starch, lipids and proteins

Solution

Plastids are double membranous, semi-autonomous organelles which store and synthesise various types of organic compounds. They develop from colourless precursors proplastids. Proplastids have the ability to divide and differentiate into various types of plastids.
So, the correct answer is 'One type of plastid can differentiate into another type of plastid depending upon the cell requirements'.

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Cell The Unit of Life Test - 75

Result

Cell The Unit of Life Test - 75

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SHARING IS CARING

Question 1

steroids

proteins

carbohydrates

all of these

Solution

Question 2

B, C and D are correct.

A alone is correct

B alone is correct

C alone is correct

Solution

Question 3

phloem parenchyma

phloem companion cells

xylem vessels

phloem fibre

Solution

Question 4

Dictyosomes

Chloroplast

Ribosomes

ER

Solution

Question 5

Dictyosome

Lysosome

Peroxisome

Glyoxysome

Solution

Question 6

ER $$\rightarrow$$ Golgi bodiesVL

Golgi bodies $$\rightarrow$$ ER $$\rightarrow$$ L

Nucleus $$\rightarrow$$ Golgi bodies $$\rightarrow$$ L

Mitochondira $$\rightarrow$$ ER $$\rightarrow$$ Golgi bodies $$\rightarrow$$ L

Solution

Question 7

proteins

lipids

carbohydrates

vitamins

Solution

Question 8

Cell wall

Plastids

A large central vacuole

All of these

Solution

Question 9

Ribsomoes, George Palade

Ribosomes, Perner

Lysomes, de Duve

Peroxisomes, de Duve

Solution

Question 10

They have to perform the same location

They are localised in the aerial parts of plants

One type of plastid can differentiate into another type of plastid depending upon the cell requirements

All plastids have to store starch, lipids and proteins

Solution

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