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

Question : The cell organelle involved in glycosylation of protein is
a) endoplasmic reticulum
b) mitochondria
c) peroxisome
d) ribosome
Answer : A

Question : The outer layer of vacuole is called
a) tonoplast
b) leucoplast
c) cell wall
d) plasmalayer
Answer : A

Question : Which of the following cell organelle remains enveloped by a single unit membrane?
a) Lysosomes
b) Chloroplast
c) Mitochondria
d) Nucleus
Answer : A

Question : The nucleolus is the site of formation of
a) ribosomes
b) spindle fibres
c) chromosomes
d) peroxisomes
Answer : A

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

Question : The fluidity of membranes in a plant in cold weather may be maintained by
a) increasing the number of phospholipids with unsaturated hydrocarbon tails
b) increasing the proportion of integral proteins
c) increasing concentration of cholesterol in membrane
d) increasing the number of phospholipids with saturated hydrocarbon tail
Answer : A

Question : The cell as a basic unit of structure of living beings was discovered by
a) Schleiden and Schwann
b) Gregore Mendel
c) Robert Hooke
d) Aristotle
Answer : A

Question : Which pair of structures are usually found in both plant and animal cells?
a) Cell membrane and nucleolus
b) Cell membrane and cell wall
c) Nucleolus and chloroplast
d) Nucleus and cell wall
Answer : A

Question : Most abundant lipid in the cell membrane is
a) phospholipids
b) cerebrosides
c) glycolipids
d) None of these
Answer : A

Question :  Cell recognition and adhesion are facilitated by components of plasma membrane. These components are generally
a) glycolipids and glycoproteins
b) both lipids and proteins
c) protein molecules alone
d) None of these
Answer : A

Question : Smooth endoplasmic reticulum is well developed in the cells which synthesize
a) steorids
b) carbohydrates
c) proteins
d) all of these
Answer : A

Question : Quasi-fluid nature of membrane is due to
a) Phospholipid
b) Peripheral protein
c) Integral protein
d) Sugar moiety
Answer : A

Question : Gas vacuole is present in
a) All of the above
b) Green photosynthetic bacteria
c) Purple photosynthetic bacteria
d) Blue green algae
Answer : A

Question : Which of the following feature is not associated with centrosome?
a) Lipid bilayer covering
b) Two centriole
c) Two cylindrical structures
d) Pericentriolar material
Answer : A

Question : What is the site of DNA and centriole duplication respectively
a) Nucleus, cytoplasm
b) Nucleus, nucleus
c) Cytoplasm, nucleus
d) Nucleus, nucleolous
Answer : A

Question : Cell wall
a) All are correct
b) Contains minerals like calcium carbonate in certain algae
c) Helps in cell to cell interaction
d) Helps in cell to cell interaction
Answer : A

Question : Golgi bodies are involved in
a) Recycling of broken plasma membrane during endocytosis
b) Modification of proteins
c) Synthesis of glycolipids
d) All of the above
Answer : D

Question : Aleuroplasts, amyloplasts and elaioplasts
a) Store protein, starch and fat respectively
b) Help in photolysis of water
c) Store reserve food and pigments
d) Divide by multiple fissio
Answer : A

Question : Reformation of nucleolus, golgi complex and ER occurs in
a) Anaphase
b) Metaphase
c) Both
d) None of these
Answer : A

Question : Which group of organelles is involved in synthesis of substances needed by cell?
a) Ribosome, RER, SER
b) RER, lysosome, vacuole
c) Lysosome, vacuole, ribosome
d) Noner of these
​​​​​​​Answer : A