CBSE Class 11 Biology Cell The Unit of Life MCQs Set 06

Question: Plastids storing fat are called
a) Elaioplasts
b) Sphaerosomes
c) Aleuroplasts
d) Pyrenoids
Answer: a

Question: The DNA is located in the ____ of ____
a) Cisternae, mitochondria
b) Matrix, mitochondria
c) Intermembrane space, mitochondria
d) Grana, chloroplast
Answer: b

Question: Which of the following organelles are double-bound?
a) Nucleus
b) Chloroplast
c) Mitochondria
d) All
Answer: d

Question: Axoneme with 9+2 microtubular arrangement occurs in
a) Cilia
b) Flagella
c) Both (a) and (b)
d) Centriole
Answer: c

Question: A component of cytoskeleton is
a) Microtubule
b) Bone
c) Chitin
d) Cartilage
Answer: a

Question: Chromosomes having equal or almost equal arms are called
a) Metacentric
b) Acrocentric
c) Polycentric
d) Acentric
Answer: a

Question: Which one is the correct statement?
a) In amoeba, contractile vacuole helps in excretion and osmoregulation
b) Protists form food vacuoles by engulfing particles
c) Both (a) and (b)
d) Vacuole is always large sized in all plant cells
Answer: c

Question: Nucleolus is
a) A rounded structure in cytoplasm near nucleus
b) A rounded structure inside nucleus containing rRNA
c) A rod-shaped structure near nucleus
d) None
Answer: b

Question: Function of RER is
a) Autolysis
b) Protein synthesis
c) Lipid synthesis
d) Carbohydrate synthesis
Answer: b

Question: Basal bodies are associated with the formation of
a) Phragmoplast
b) Cilia and flagella
c) Cell plate
d) Kinetochore
Answer: b

Question: Plastids are found in
a) All animal cells
b) Some animal cells
c) All plant cells
d) All plant cells and euglenoids
Answer: d

Question: Lysosomes contain
a) Carbohydrates
b) Hormones
c) Nucleic acids
d) Hydrolases
Answer: d

Question: Both membranes of mitochondria are
a) Structurally different but functionally similar
b) Structurally and functionally different
c) Structurally similar but functionally different
d) Structurally different but functionally similar
Answer: b

Question: The matrix of which organelle contains circular DNA, RNA, 70S ribosomes and enzymes for aerobic respiration?
a) Chloroplast
b) Golgi body
c) Mitochondrion
d) ER
Answer: c

Question: Structure with greatest volume in a plant cell is
a) Vacuole
b) Lysosome
c) Glyoxysome
d) Ribosome
Answer: a

Question: Plastids based on pigment types are
a) 3 types
b) 4 types
c) 2 types
d) 5 types
Answer: a

Question: Important site of glycoprotein and glycolipid formation is
a) SER
b) Lysosome
c) Golgi apparatus
d) Mitochondria
Answer: c

Statement Type Questions

Question: Select the incorrect statement about prokaryotic ribosomes.
a) 50S and 30S subunits unite to form 70S ribosomes.
b) Polysome/polyribosome consists of many ribosomes only.
c) Ribosome is the site of protein synthesis.
d) Polysome indicates the synthesis of identical polypeptide in multiple copies.
Answer: b

Question: Which of the following statements is/are correct?
a) (i), (ii), (iii) and (iv)
b) Only (i) and (ii)
c) Only (iv)
d) None of the above
Answer: a

Question: Which of the following is not the function of cell wall?
a) Only (i)
b) Only (iv)
c) Only (ii), (iii) and (iv)
d) None of the above
Answer: d

Question: Which of the following statements are incorrect?
a) (i) and (iii)
b) (iii) and (iv)
c) (ii) and (iv)
d) (i) and (iv)
Answer: a

Question: Choose the wrong statements regarding bacterial cell.
a) (i) and (iii)
b) (i) and (ii)
c) (ii) and (iii)
d) (i) and (iv)
Answer: c

Question: Consider the following statements and choose the correct statement.
a) (i) and (iii)
b) (ii) and (iv)
c) (iii) and (iv)
d) (ii) and (iii)
Answer: d

Question: Read the statements regarding functions of Golgi apparatus. Which is correct?
a) (i) is wrong but (ii) and (iii) are correct
b) (ii) is wrong but (i) and (iii) are correct
c) (ii) and (iii) are wrong but (i) is correct
d) All are correct
Answer: d

Assertion/Reason Type Questions

In the following questions, a statement of Assertion is followed by a statement of Reason.
(a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
(b) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.
(c) If Assertion is true but Reason is false.
(d) If both Assertion and Reason are false.

Question: Assertion : Cells vary greatly in their shape.
Reason : The shape of cell does not depend on the function they perform.
Answer: c

Question: Assertion : The acrocentric chromosome has centromere at the terminal position.
Reason : The metacentric chromosome has centromere slightly away from the middle of the chromosome.
Answer: d

Question: Assertion : Pili are nonmotile appendages of bacteria.
Reason : Pili take part in conjugation.
Answer: b

Critical Thinking Type Questions

Question: Microtubules, motor proteins, and actin filaments are all part of the
a) mechanism of photosynthesis that occurs in chloroplasts
b) rough ER in prokaryotic cells
c) cytoskeleton of eukaryotic cells
d) process that moves small molecules across membranes
Answer: c

Question: Centrifugation of a cell forms a pellet that, when bathed in glucose, shows ATP production. This pellet most likely contains
a) cytosol
b) mitochondria
c) lysosomes
d) Golgi bodies
Answer: b

Question: pH of vacuolar cell sap is
a) neutral and isotonic
b) alkaline and isotonic
c) acidic and hypertonic
d) equal to cytoplasm and isotonic
Answer: c

Question: The best way to identify a cell as prokaryotic or eukaryotic is to check whether
a) it came from a single-celled or multicellular organism
b) it has a nucleus
c) it has a plasma membrane
d) it has cytosol
Answer: a

Question: The main organelle involved in modification and routing of newly synthesized proteins is
a) chloroplast
b) mitochondria
c) lysosome
d) endoplasmic reticulum
Answer: d

Matching Type Questions

Question: Which of the following pair are correctly matched?
A. Microtubules – Structural components of cilia
B. Centrioles – Store hydrolytic enzymes
C. Amyloplasts – Store oil protein and starch in plants
(a) A, B and C
(b) A and B
(c) A only
(d) A and C
Answer: c

Question: Which one of the following combination is mismatched?
(a) Glycocalyx – May be capsule or slime layer
(b) Pili – Reproduction
(c) Cell wall – Protective, determines shape, prevents from bursting
(d) Flagella, pili and fimbriae – Surface structures of bacterial cell
Answer: b

Question: Which one of the following pairs is NOT correctly matched?
(a) Cristae – The tubular structure formed by the folding of the inner membrane of the mitochondrion.
(b) Plasmodesmata – The membrane surrounding the vacuole in plants.
(c) Grana – Membrane bound discs in chloroplasts that contain chlorophylls and carotenoids.
(d) Middle lamella – Layer between adjacent cells walls in plants derived from cell plate.
Answer: b

Question: Which one of the following cellular parts is correctly matched with their characters ?
(a) Centrioles – Sites for active RNA synthesis.
(b) Lysosomes – Optimally active at a pH of about 8.5.
(c) Thylakoids – Flattened membranous sacs forming the grana of chloroplasts.
(d) Ribosomes – Those on chloroplasts are larger (80S) while those in the cytoplasm are smaller (70S).
Answer: c

Question: Which of the following terms is NOT correctly matched with its feature?
(a) Osmosis – Movement of water by diffusion.
(b) Nucleoplasm – Site of active synthesis of ribosomal RNA.
(c) Mesosome – Infolding of cell membrane and characteristics of eukaryotes.
(d) Pili – Elongated tubular surface structures (made of special protein) of bacteria.
Answer: c