Cell - The Unit of Life Test

Result

Cell - The Unit of Life Test - 1

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

Which cell organelle is present in both prokaryotic and eukaryotic cells?

A
Mitochondria

B
Endoplasmic reticulum

C
Nucleus

D
Ribosomes
Solution
Prokaryotes and eukaryotes are the two different types of cells.
Eukaryotic cells contain membrane-bound organelles, such as the nucleus, endoplasmic reticulum, mitochondria while prokaryotic cells do not but the ribosome is the only organelle that can be seen in both prokaryotic and eukaryotic cells.
Prokaryotic and eukaryotic ribosomes perform the same functions that is protein synthesis, however, eukaryotic ribosomes are much larger than prokaryotic ones.
Hence, the correct option is D
NCERT Reference: Page no. 128 of topic “8.4 PROKARYOTIC CELLS” of chapter 8 of NCERT
Question 2
4 / -1

Which of the following is a prokaryote?

A
Bacteria

B
Amoeba

C
Chlamydomonas

D
Spirogyra
Solution
Prokaryotic cells are cells that do not have a true nucleus or most other cell organelles.
Organisms that have prokaryotic cells are unicellular and called prokaryotes.
Bacteria and archaea are prokaryotes.

Fig: Prokaryotic cell
Hence, the correct option is A
NCERT Reference: Page no. 127 of topic “8.4 PROKARYOTIC CELLS” of chapter 8 of NCERT
Question 3
4 / -1

What is the full form of PPLO?

A
Pleuro Pneumonia Like Organisms

B
Pleuro Parasite Like Organisms

C
Phosphatic Pneumonia Like Organisms

D
Pleural Parasite Like Organisms

Solution

The full form of PPLO is Pleuro Pneumonia Like Organisms. They are a type of prokaryotic organisms, which also include bacteria, blue – green algae and mycoplasma. The lack a true nucleus.
Hence, the correct option is A
NCERT Reference: Page no. 127 of topic “8.4 PROKARYOTIC CELLS” of chapter 8 of NCERT
Question 4
4 / -1

The prokaryotic cells are characterised by:

A
Presence of a distinct chromosome.

B
Absence of chromatin material.

C
Absence of a nuclear membrane.

D
Presence of a distinct nuclear membrane.
Solution
Most prokaryotes carry a small amount of genetic material in the form of a single molecule, or chromosome, of circular DNA.
The DNA in prokaryotes is contained in a central area of the cell called the nucleoid, which is not surrounded by a nuclear membrane.

Hence, the correct option is C
NCERT Reference: Page no. 128 of topic “8.4 PROKARYOTIC CELLS” of chapter 8 of NCERT
Question 5
4 / -1

Eukaryotic cells are different from prokaryotic cells in having:

A
True nucleus

B
Mitochondria in mesosome form

C
Only smooth endoplasmic reticulum

D
70S ribosomes

Solution

The distinction is that eukaryotic cells have a "true" nucleus containing their DNA, whereas prokaryotic cells do not have a nucleus.
Hence, the correct option is A
NCERT Reference: Page no. 129 of topic “8.5 EUKARYOTIC CELLS” of chapter 8 of NCERT
Question 6
4 / -1

Protoplasm found inside the nucleus is known as:

A
Amyloplast

B
Nucleoplasm

C
Cytoplasm

D
Elaioplast
Solution
Similar to the cytoplasm of a cell (protoplasm), the nucleus contains 'nucleoplasm' (nucleus sap) or karyoplasm.
The nucleoplasm is one of the types of protoplasm, and it is enveloped by the nuclear membrane or nuclear envelope.
The nucleoplasm includes the chromosomes and nucleoli.
Nucleoplasm:
Hence, the correct option is B
NCERT Reference: Page no. 138 of topic “8.5.10 Nucleus” of chapter 8 of NCERT
Question 7
4 / -1

From which structure is a mesosome derived from?

A
Cell membrane

B
Plasmid

C
Cell wall

D
Ribosome
Solution
Mesosome is a characteristic feature of prokaryotes, which is not present in eukaryotic cells.
It is a differentiated form of cell membrane derived by the infoldings of the cell membrane in prokaryotes.

Hence, the correct option is A
NCERT Reference: Page no. 128 of topic “8.4 PROKARYOTIC CELLS” of chapter 8 of NCERT
Question 8
4 / -1

The largest subunit of prokaryotic ribosomes is:

A
40S

B
60S

C
30S

D
50S
Solution
50S, roughly equivalent to the 60S ribosomal subunit in eukaryotic cells, is the larger subunit of the 70S ribosome of prokaryotes.
The 50S subunit is primarily composed of proteins but also contains single-stranded RNA known as ribosomal RNA (rRNA).
Hence, the correct option is D
NCERT Reference: Page no. 129 of topic “8.4.2 Ribosomes and Inclusion Bodies” of chapter 8 of NCERT
Question 9
4 / -1

Which of these statements is not true regarding inclusion bodies in prokaryotes?

A
Reserve material is stored in these structures

B
They are bound by a single membrane

C
Gas vacuoles are found in blue-green bacteria

D
They lie free in the cytoplasm
Solution
Inclusion bodies are not covered by membranes and lie freely in the cytoplasm.
They store reserve materials such as phosphate granules.
Blue-green bacteria contain gas vacuoles which is an inclusion body.
Fig: Image showing inclusion bodies
Hence, the correct option is B
NCERT Reference: Page no. 129 of topic “8.4.2 Ribosomes and Inclusion
Question 10
4 / -1

Glycocalyx is associated with ___________

A
Nucleosome

B
Nucleus

C
Plasma membrane

D
Nucleolus
Solution
Glycocalyx or pericellular matrix is a carbohydrate-enriched coating of glycoprotein and a glycolipid that covers the cell membranes of a few bacteria, epithelial cells and other cells.
It is mainly used in the recognition of the cell and also regulates the endothelial vascular tissues.
The prokaryotic cell envelope consists of a three-layered structure – the outermost glycocalyx, followed by a cell wall and then the plasma membrane.

Fig: Bacterial cell
Hence, the correct option is C.
NCERT Reference: Page no. 128 of topic “8.4.1 Cell Envelope and its Modifications” of chapter 8 of NCERT