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NEET • BIOLOGY • CELL-THE UNIT OF LIFE
Cell-the unit of life practice · Easy
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Showing 31-60 of 77 questions
31
Easy
31 of 77
Remembering
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Which of the following represents prokaryotic cells?
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Correct option: D
All of these
Option D (All of these) is correct because PPLO (Pleuro Pneumonia Like Organisms), Mycoplasma, and Bacteria are all examples of prokaryotic cells.
32
Easy
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Remembering
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Ribosomes are found in
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Correct option: C
Mitochondria and bacterial cell
Option C (Mitochondria and bacterial cell) is correct because both mitochondria (in eukaryotes) and bacterial cells contain their own ribosomes for protein synthesis.
33
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Understanding
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Prokaryotic cell is characterised by
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Correct option: D
Absence of endoplasmic reticulum, golgi bodies and spindle fibres.
Option D is correct because prokaryotic cells lack membrane-bound organelles like endoplasmic reticulum, Golgi bodies, and spindle fibers.
34
Easy
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Understanding
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In eukaryotic cells, genetic material or DNA is organised into
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Correct option: C
Chromosomes and chromatin
Option C (Chromosomes and chromatin) is correct because DNA in eukaryotic cells is organized as both chromosomes during cell division and chromatin during interphase.
35
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Understanding
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Which of the given chromosomes appear L-shaped during anaphase?
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Correct option: B
Sub-metacentric chromosome
Option B (Sub-metacentric chromosome) is correct because sub-metacentric chromosomes have centromeres slightly away from the middle, resulting in L-shaped appearance during anaphase.
36
Easy
36 of 77
Understanding
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For the study of structure of nucleus, the best cell is
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Correct option: A
Cell in the interphase
Cell in the interphase is the correct answer because the nucleus is most visible and accessible for study during interphase when the chromosomes are not condensed.
37
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Understanding
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Which one of the following structures between two adjacent cells is an effective transport pathway?
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Correct option: A
Plasmodesmata
Option A is correct because plasmodesmata are cytoplasmic channels that directly connect adjacent plant cells, facilitating transport.
38
Easy
38 of 77
Remembering
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Chemical constituent of cystolith in plants is
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Correct option: A
Calcium carbonate
Option A is correct because cystoliths, which are crystals found in some plant cells, are composed of calcium carbonate.
39
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Analyzing
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Assertion (A): Every cell behaves as a compartment.
Reason (R): An organelle is a distinct part of cell which has a particular structure and function.
Reason (R): An organelle is a distinct part of cell which has a particular structure and function.
View answer and explanation
Correct option: C
If A is true, but R is false
Option C is correct because while every cell behaves as a compartment, the reason is not because an organelle has a particular structure and function. The compartmentalization is due to the cell membrane.
40
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Understanding
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The hydrophobic tails of a phospholipid bilayer are oriented towards the–
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Correct option: A
Interior of the Plasma membrane
Option A (Interior of the Plasma membrane) is correct because the hydrophobic tails of phospholipids are oriented inward, away from the aqueous environment.
41
Easy
41 of 77
Analyzing
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Three of the following statements regarding cell organelles are correct, while one is wrong. Which one is wrong?
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Correct option: A
Lysosomes are double membraned vesicles budded off from Golgi apparatus and contain digestive enzymes
Option A is wrong because lysosomes are single-membraned vesicles, not double-membraned.
42
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Remembering
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The suicidal bags of a cell contains
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Correct option: A
Acid hydrolases
Option A (Acid hydrolases) is correct because lysosomes, known as suicidal bags, contain acid hydrolases which are enzymes that break down cellular waste and debris.
43
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Remembering
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Which one of the following remains absent in prokaryotes?
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Correct option: A
Nuclear membrane
Option A (Nuclear membrane) is correct because prokaryotes lack a membrane-bound nucleus; their genetic material is located in the cytoplasm.
44
Easy
44 of 77
Understanding
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In eukaryotic cells, the amount of basic proteins is often found to be
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Correct option: A
More than the amount of DNA
Option A (More than the amount of DNA) is correct because histones, the basic proteins, are needed in large quantities to package and condense the DNA in eukaryotic cells.
45
Easy
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Analyzing
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Find out the incorrect statements:
1)Blue - green alga is a prokaryotic cell
2)WBC is ameboid in shape
3) Mycoplasma is the largest cell
4) Microbodies are cell organelles
5) Prokaryotes do not exhibit a wide variety of shapes
1)Blue - green alga is a prokaryotic cell
2)WBC is ameboid in shape
3) Mycoplasma is the largest cell
4) Microbodies are cell organelles
5) Prokaryotes do not exhibit a wide variety of shapes
View answer and explanation
Correct option: D
3 and 5 ony
Option D (3 and 5 ony) is correct because Mycoplasma is the smallest cell, not the largest, and prokaryotes exhibit a wide variety of shapes.
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46
Easy
46 of 77
Remembering
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In eubacteria, a celluler component that resembles eukaryotic cells is
View answer and explanation
Correct option: D
Plasma membrance
Option D (Plasma membrance) is correct because the plasma membrane in eubacteria has a similar structure and function to that of eukaryotic cells.
47
Easy
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Remembering
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Which one of the following organisms is not an example of eukaryotic cells?
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Correct option: A
Option A () is correct because it is a prokaryotic cell, while the others are eukaryotic.
48
Easy
48 of 77
Remembering
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In eukaryotes, the cell wall constitutes
View answer and explanation
Correct option: C
Primary wall, middle lamella and secondary wall
Option C is correct because the cell wall in eukaryotes (specifically plant cells) consists of the primary wall, middle lamella, and secondary wall.
49
Easy
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Remembering
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Which of the following is the filler substance of the matrix of eukaryotic cell?
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Correct option: A
Pectin
Option A is correct because pectin is a major component of the middle lamella and the primary cell wall in plant cells, acting as a filler substance.
50
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Understanding
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Barophilic prokaryotes
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Correct option: C
Grow and multiply in very deep marine sediments
Option C (Grow and multiply in very deep marine sediments) is correct because barophilic prokaryotes thrive under high-pressure conditions found in deep marine environments.
51
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51 of 77
Remembering
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Which of the following is true about microbodies:
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Correct option: D
All of the above
Option D (All of the above) is correct because microbodies are minute vesicular, membrane-bound structures found in both plant and animal cells.
52
Easy
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Analyzing
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Read the following statements:
I. Eukaryotic plant cell walls contain peptidoglycans in addition to cellulose.
II. Plasmodesmata and centrioles are found in all plant cells.
III. Plant cell contains 80S ribosomes which they use to manufacture proteins.
IV. Amyloplasts are a type of plastids found in a plant cell that help so store carbohydrates.
Identify the statements that are INCORRECT regarding plant cell.
I. Eukaryotic plant cell walls contain peptidoglycans in addition to cellulose.
II. Plasmodesmata and centrioles are found in all plant cells.
III. Plant cell contains 80S ribosomes which they use to manufacture proteins.
IV. Amyloplasts are a type of plastids found in a plant cell that help so store carbohydrates.
Identify the statements that are INCORRECT regarding plant cell.
View answer and explanation
Correct option: A
I and II only
Option A (I and II only) is correct because statement I is wrong (plant cell walls do not contain peptidoglycans) and statement II is also wrong (centrioles are not found in all plant cells).
53
Easy
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Remembering
+4 | -1
…A… are granular structures first observed under electron microscope as dense particles by …B… (1953). Here, A and B refer to
View answer and explanation
Correct option: D
A-Ribosomes; B-George Palade
Option D (A-Ribosomes; B-George Palade) is correct because ribosomes are granular structures first observed under the electron microscope as dense particles by George Palade in 1953.
54
Easy
54 of 77
Remembering
+4 | -1
Most of the bacterial cell envelope consists of
View answer and explanation
Correct option: B
A tightly bound three layered structure
Option B (A tightly bound three layered structure) is correct because the bacterial cell envelope typically consists of the glycocalyx, cell wall, and cell membrane.
55
Easy
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Understanding
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Diameter of DNA is constant due to
View answer and explanation
Correct option: A
Hydrogen bonds between base pairs
Option A (Hydrogen bonds between base pairs) is correct because hydrogen bonds between complementary base pairs (A-T, G-C) maintain the constant diameter of the DNA double helix.
56
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Understanding
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Channel proteins are involved in
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Correct option: D
Passive transport of ions
Option D (Passive transport of ions) is correct because channel proteins facilitate the movement of ions across the cell membrane down their concentration gradient, which is a form of passive transport.
57
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Understanding
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The membrane potential of cell favours the
View answer and explanation
Correct option: A
Movement of cations into the cell
Option A is correct because the negative membrane potential attracts positively charged cations into the cell.
58
Easy
58 of 77
Remembering
+4 | -1
In which one of the following would you expect to find glyoxysomes?
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Correct option: B
Endosperm of castor
Option B (Endosperm of castor) is correct because glyoxysomes are abundant in plant tissues, particularly the endosperm of germinating seeds like castor, where they convert fats to sugars.
59
Easy
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Remembering
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Middle lamella is mainly composed of
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Correct option: C
Calcium pectate
Option C (Calcium pectate) is correct because the middle lamella, the layer cementing adjacent plant cells, is primarily composed of calcium pectate.
60
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Remembering
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Protoplast is
View answer and explanation
Correct option: B
Cell without cell wall
Option B (Cell without cell wall) is correct because a protoplast is a plant or bacterial cell that has had its cell wall completely removed.
Revision notes and key takeaways
Review CELL-THE UNIT OF LIFE in your textbook or class notes, then use this set to check your understanding.
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