Cell The Unit of Life Test

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Cell The Unit of Life Test - 6

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Question 1
1 / -0

Lipid molecules of plasma membrane occur

A
Alternately

B
Parallel

C
Scattered

D
In series

Solution

The lipid molecules occur in chains. In plasma membrane two molecular chains of lipids remain parallel to each other.
Question 2
1 / -0

The plasma membrane consists mainly of

A
Proteins embedded in a carbohydrate bilayer

B
Proteins embedded in a polymer of glucose molecules

C
Proteins embedded in a phospholipids layer

D
Proteins embedded in a glucose molecules

Solution

The plasma membrane is composed of lipids that are arranged in a bilayer. Also, the lipids are arranged within the membrane with the polar head towards the outer sides and the hydrophobic tails towards the inner part.

The membrane proteins can be classified as integral or peripheral. Peripheral proteins lie on the surface.
Question 3
1 / -0

The nucleus was first described by

A
Schwann

B
Flemming

C
Robert brown

D
Palade

Solution

Nucleus as a cell organelle was first described by Robert Brown as early as 1831.
Question 4
1 / -0

Lysosomes are produced by

A
Endoplasmic reticulum

B
Golgi bodies

C
Leucoplast

D
Mitochondria

Solution

Lysosomes are manufactured and budded into the cytoplasm by the Golgi apparatus with enzymes inside.

The enzymes that are within the lysosome are made in the rough endoplasmic reticulum, which are then delivered to the Golgi apparatus via transport vesicles.
Question 5
1 / -0

The eukaryotic ribosomes are of

A
30S

B
70S

C
80S

D
50S

Solution

The eukaryotic ribosomes are 80S while the prokaryotic ribosomes are 70S. Here ‘S’ stands for the sedimentation coefficient; it indirectly is a measure of density and size.
Question 6
1 / -0

The vacuoles are bound by the single membrane is called as

A
Food vacuole

B
Contractile vacuole

C
Cisternae

D
Tonoplast

Solution

The vacuole is bound by a single membrane called tonoplast. In plant cells the vacuoles can occupy up to 90 per cent of the volume of the cell. In plants, the tonoplast facilitates the transport of a number of ions.
Question 7
1 / -0

The chromosome having centromeres at one terminal end is called

A
Acrocentric

B
Submetacentric

C
Metacentric

D
Telocentric

Solution

A telocentric chromosome's centromere is located at the terminal end of the chromosome. Telomeres may extend from both ends of the chromosome.their shape is like i during anaphase. For example, the standard house mouse karyotype has only telocentric chromosomes.

Humans do not possess telocentric chromosomes
Question 8
1 / -0

Nucleoplasm otherwise called as

A
Nucleosome

B
Nuclear matrix

C
Nucleolus

D
Nuclear pores

Solution

The nuclear matrix or the nucleoplasm contains nucleolus and chromatin. The nucleoli are spherical structures present in the nucleoplasm.
Question 9
1 / -0

Lysosomes are rich in hydrolytic enzymes such as

A
Hydrolyses, lipases and proteases

B
Proteases and lipases

C
Hydrolyses and proteases

D
Hydrolyses and lipases

Solution

Lysosomes are found to be very rich in almost all types of hydrolytic enzymes (hydrolases – lipases, proteases, carbohydrases) optimally active at the acidic pH. These enzymes are capable of digesting carbohydrates, proteins, lipids and nucleic acids.
Question 10
1 / -0

Mitochondria is called “Power house of the cell” because

A
Formation of ATP

B
70S ribosomes

C
Presence of DNA

D
Presence of matrix

Solution

Mitochondria is called as power house of the cell because it contain enzyme for cellular respiration in which energy is released in form of ATP.

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Re-Attempt Weekly Quiz Competition

Cell The Unit of Life Test - 6

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Cell The Unit of Life Test - 6

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SHARING IS CARING

Question 1

Alternately

Parallel

Scattered

In series

Solution

Question 2

Proteins embedded in a carbohydrate bilayer

Proteins embedded in a polymer of glucose molecules

Proteins embedded in a phospholipids layer

Proteins embedded in a glucose molecules

Solution

Question 3

Schwann

Flemming

Robert brown

Palade

Solution

Question 4

Endoplasmic reticulum

Golgi bodies

Leucoplast

Mitochondria

Solution

Question 5

30S

70S

80S

50S

Solution

Question 6

Food vacuole

Contractile vacuole

Cisternae

Tonoplast

Solution

Question 7

Acrocentric

Submetacentric

Metacentric

Telocentric

Solution

Question 8

Nucleosome

Nuclear matrix

Nucleolus

Nuclear pores

Solution

Question 9

Hydrolyses, lipases and proteases

Proteases and lipases

Hydrolyses and proteases

Hydrolyses and lipases

Solution

Question 10

Formation of ATP

70S ribosomes

Presence of DNA

Presence of matrix

Solution

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