NEET Biology Cell The Unit of Life MCQs Set 27

Biology Objective Questions and Answers: Cell The Unit of Life

Explore reliable objective questions for Cell The Unit of Life tailored for NEET learners. Utilizing these Biology multiple-choice formats ensures thorough preparation and strengthens problem-solving speed for upcoming school assessments.

Download Cell The Unit of Life MCQs with Answers

Access the complete set of multiple-choice questions for Cell The Unit of Life below. This focused format allows students to isolate specific topics for thorough review and uninterrupted practice alongside official NEET textbooks.

Multiple Choice Questions

Question 1: In germinating seeds fatty acids are degraded exclusively in the
(a) Mitochondria
(b) Proplastids
(c) Glyoxysomes
(d) Peroxisomes
Show Answer & Explanation

Answer: (c) Glyoxysomes

Explanation:
1. This is so because they contain enzymes related to glyoxylate cycle.

Question 2: The two sub-units of ribosome remain united at a critical ion level of
(a) Calcium
(b) Copper
(c) Manganese
(d) Magnesium
Show Answer & Explanation

Answer: (d) Magnesium

Explanation:
1. Mangnesium ion concentration help in union of two subunits of ribosomes.

Question 3: Which one of the following is not a constituent of cell membrane?
(a) Phospholipids
(b) Cholesterol
(c) Glycolipids
(d) Proline
Show Answer & Explanation

Answer: (d) Proline

Explanation:
1. This option, Proline, is the one that agrees with the standard NCERT facts for this topic.

Question 4: Select the wrong statement from the following:
(a) The chloroplasts are generally much larger than mitochondria
(b) Both chloroplasts and mitochondria contain an inner and an outer membrane
(c) Both chloroplasts and mitochondria have an internal compartment, the thylakoid space bounded by the thylakoid membrane
(d) Both chloroplasts and mitochondria contain DNA.
Show Answer & Explanation

Answer: (c) Both chloroplasts and mitochondria have an internal compartment, the thylakoid space bounded by the thylakoid membrane

Explanation:
1. Only chloroplast have thylakoid.

Question 5: Which of the following statements regarding mitochondrial membrane is not correct?
(a) The outer membrane is permeable to all kinds of molecules
(b) The enzymes of the electron transfer chain are embedded in the outer membrane
(c) The inner membrane is highly convoluted forming a series of infoldings
(d) The outer membrane resembles a sieve
Show Answer & Explanation

Answer: (b) The enzymes of the electron transfer chain are embedded in the outer membrane

Explanation:
1. They are embedded in inner membrane of mitochondria.

Question 6: Which of the following statements regarding cilia is not correct? 2+
(a) The organized beating of cilia is controlled by fluxes of Ca across the membrane
(b) Cilia are hair-like cellular appendages
(c) Microtubules of cilia are composed of tubulin
(d) Cilia contain an outer ring of nine doublet microtubules surrounding two single microtubules
Show Answer & Explanation

Answer: (a) The organized beating of cilia is controlled by fluxes of Ca across the membrane

Explanation:
1. This option, The organized beating of cilia is controlled by fluxes of Ca across the membrane, is the one that agrees with the standard NCERT facts for this topic.

Question 7: The main organelle involved in modification and routing of newly synthesized proteins to their destinations is
(a) Mitochondria
(b) Endoplasmic reticulum
(c) Lysosome
(d) Chloroplast
Show Answer & Explanation

Answer: (b) Endoplasmic reticulum

Explanation:
1. This option, Endoplasmic reticulum, is the one that agrees with the standard NCERT facts for this topic.

Question 8: Chlorophyll in chloroplasts is located in
(a) Grana
(b) Pyrenoid
(c) Stroma
(d) Both (1) & (3)
Show Answer & Explanation

Answer: (a) Grana

Explanation:
1. Stacks of thylakoids (flattened sac-like structure) is known as grana.

Question 9: Protein synthesis in an animal cell occurs
(a) Only on the ribosomes present in cytosol
(b) On ribosomes present in cytoplasm as well as in mitochondria
(c) Only on ribosomes attached to the nuclear envelope and endoplasmic reticulum
(d) On ribosomes present in the nucleolus as well as in cytoplasm
Show Answer & Explanation

Answer: (b) On ribosomes present in cytoplasm as well as in mitochondria

Explanation:
1. This option, On ribosomes present in cytoplasm as well as in mitochondria, is the one that agrees with the standard NCERT facts for this topic.

Question 10: According to widely accepted “fluid mosaic model” cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements is incorrect?
(a) Proteins in cell membranes can travel within the lipid bilayer
(b) Proteins can remain confined within certain domains of the membrane
(c) Proteins can also undergo flip-flop movements in the lipid bilayer
(d) Many proteins remain completely embedded within the lipid bilayer
Show Answer & Explanation

Answer: (c) Proteins can also undergo flip-flop movements in the lipid bilayer

Explanation:
1. Proteins can also undergo flip-flop movements in the bilipid layer.

Question 11: Genes for cytoplasmic male sterility in plants are generally located in
(a) Mitochondrial genome
(b) Cytosol
(c) Chloroplast genome
(d) Nuclear genome
Show Answer & Explanation

Answer: (a) Mitochondrial genome

Explanation:
1. Mitochondria is also related to maternal / cytoplasmic inheritance.

Question 12: The term 'glycocalyx' is used for
(a) A layer surrounding the cell wall of bacteria
(b) A layer present between cell wall and membrane of bacteria
(c) Cell wall of bacteria
(d) Bacterial cell genetically engineered to possess N-glycosylated proteins
Show Answer & Explanation

Answer: (a) A layer surrounding the cell wall of bacteria

Explanation:
1. → Outermost layer comprising a coating of mucous or polysaccharides macromolecules → It protects the cells and also helps in adhesion.

Question 13: Why is a capsule advantageous to a bacterium?
(a) It allows the bacterium to attach to the surface
(b) It protects the bacterium from desiccation
(c) It provides means of locomotion
(d) It allows bacterium to hide from host's immune system
Show Answer & Explanation

Answer: (d) It allows bacterium to hide from host's immune system

Explanation:
1. Attachment → Fimbriae Protection from dessication → Slime layer Locomotion → Cilia / flagella.

Question 14: Which one of the following organisms is not an example of eukaryotic cells?
(a) Amoeba proteus
(b) Paramecium caudatum
(c) Escherichia coli
(d) Euglena viridis
Show Answer & Explanation

Answer: (c) Escherichia coli

Explanation:
1. E.coli is a bacterium.

Question 15: The prokaryotic flagella possess
(a) Helically arranged protein molecule
(b) “9 + 2” membrane enclosed structure
(c) Unit membrane enclosed fibre
(d) Protein membrane enclosed fibre
Show Answer & Explanation

Answer: (a) Helically arranged protein molecule

Explanation:
1. Prokaryotic flagella.

Question 16: The site of respiration in bacteria is
(a) Ribosome
(b) Microsome
(c) Episome
(d) Mesosome
Show Answer & Explanation

Answer: (d) Mesosome

Explanation:
1. The invagination of cell membrane into the cell which increase the surface area.

Question 17: In prokaryotes, the genetic material is
(a) Linear DNA without histones
(b) Circular DNA without histones
(c) Linear DNA with histones
(d) Circular DNA with histones
Show Answer & Explanation

Answer: (b) Circular DNA without histones

Explanation:
1. Prokaryotes have double stranded and circular DNA.

Question 18: Algae have cell wall made up of
(a) Cellulose, hemicellulose and pectins
(b) Cellulose, galactans and mannans
(c) Hemicellulose, pectins and proteins
(d) Pectins, cellulose and proteins
Show Answer & Explanation

Answer: (b) Cellulose, galactans and mannans

Explanation:
1. Hemicellulose is absent in algal cell wall.

Question 19: Which one of the following structures between two adjacent cells is an effective transport pathway?
(a) Plasmalemma
(b) Plasmodesmata
(c) Plastoquinones
(d) Endoplasmic reticulum
Show Answer & Explanation

Answer: (b) Plasmodesmata

Explanation:
1. Cell wall Cell membrane (Plasmalemma) Plasmodesmata.

Question 20: The rough endoplasmic reticulum (RER) in the cells are because of the presence of
(a) Mitochondria associated with ER
(b) Ribosomes on the surface of ER
(c) Volutin granules on the surface of ER
(d) Sulphur granules on the surface of ER
Show Answer & Explanation

Answer: (b) Ribosomes on the surface of ER

Explanation:
1. These ribosomes impart rough apperance to ER.

Question 21: Which one of the following statements about cytochrome P450 is wrong?
(a) It is a coloured cell
(b) It is an enzyme involved in oxidation reactions
(c) It has an important role in metabolism
(d) It contains iron
Show Answer & Explanation

Answer: (a) It is a coloured cell

Explanation:
1. It is not a cell.

Question 22: Which cell organelle is concerned with glycosylation of protein?
(a) Ribosome
(b) Peroxisome
(c) Endoplasmic reticulum
(d) Mitochondria
Show Answer & Explanation

Answer: (c) Endoplasmic reticulum

Explanation:
1. Protein + Sugar → Glycoprotein } Glycosylation.

Question 23: The Golgi apparatus
(a) Is found only in animals
(b) Is found in prokaryotes
(c) Is a site of rapid ATP production
(d) Modifies and packages proteins
Show Answer & Explanation

Answer: (d) Modifies and packages proteins

Explanation:
1. Golgi apparatus is responsible for modification, packaging and transport of cell proteins.

Question 24: Which one of the following organelles is located near the nucleus and contains a collection of flattened membrane bound cisternae?
(a) Nucleolus
(b) Mitochondrion
(c) Centriole
(d) Golgi apparatus
Show Answer & Explanation

Answer: (d) Golgi apparatus

Explanation:
1. Golgi apparatus consist of cisternae, tubules, vesicles and golgian vacuoles.

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Cell The Unit of Life Objective Questions & Solutions for NEET Biology

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