Cell Wall Multiple Choice Questions(MCQs) and Answers

General Knowledge on Cell Membrane | Cell Biology

CONCEPTS & THEORIES of Cell Wall

QUESTIONS

Cell Wall Multiple Choice Questions(MCQs) and Answers

1 Plant cell wall is made up of
(a) Cellulose, hemicelluloses and pectin
(b) Cellulose only
(c) Cellulose, hemicelluloses and chitin
(d) Cellulose and chitin
Answer: Cellulose, hemicelluloses and pectin
2 Middle lamella is made up of pectin. Pectin is chemically
(a) Glucoronic and galacturonic acid
(b) Heteropolymer of xylose, mannose and arabinose
(c) Polymer of D-glucose units
(d) N-acetyl glucosamine and N-acetyl muramic acid
Answer: Glucoronic and galacturonic acid
3 Which of the following statements are true regarding cellulose synthesis
(a) UDP glucose is the precursor of cellulose
(b) Cellulose is synthesized on the external surface of the cell
(c) The enzyme involved is a plasma membrane bound complex called cellulose synthetase
(d) All of these
Answer: All of these
4 Which of the following groups has cell wall
(a) Bacteria and plants only
(b) Bacteria, fungi, plants and animals
(c) Bacteria, plant and animals
(d) Bacteria, fungi and plants
Answer: Bacteria, fungi and plants
5 What organism lacks cell wall?
(a) Plant cells
(b) Protozoa
(c) Bacterial cells
(d) Algae
Answer: Protozoa
6 The cell wall of diatoms composed of __________
(a) Biogenic alumina
(b) Biogenic silica
(c) Biogenic ammonia
(d) Biogenic magnesia
Answer: Biogenic silica
7 Peptidoglycan layer is present in large quantity in?
(a) Algae
(b) Fungi
(c) Gram-negative bacteria
(d) Gram-positive bacteria
Answer: Gram-positive bacteria
8 NAG and NAM of peptidoglycan layer is linked by _________
(a) beta-(1,4) glycosidic linkage
(b) alpha-(1,4) glycosidic linkage
(c) alpha-(1,6) glycosidic linkage
(d) beta-(1,6) glycosidic linkage
Answer: beta-(1,4) glycosidic linkage
9 Bayer’s junctions are sites which help in joining which of the following?
(a) cytoplasmic membrane and outer membrane
(b) outer membrane and capsule
(c) cytoplasmic membrane and periplasmic space
(d) peptidoglycan layer and cytoplasmic membrane
Answer: cytoplasmic membrane and outer membrane
10 Bacterial cell wall is made up of
(a) N-acetyl glucosamine
(b) N-acetyl muramic acid
(c) N-acetyl glucosamine, N-acetyl muramic acid and amino acids
(d) Both a and b
Answer: N-acetyl glucosamine, N-acetyl muramic acid and amino acids
11 Chlorzinc Iodide is used to stain
(a) Hemicellulose
(b) Cellulose
(c) Pectin
(d) Lignin
Answer: Cellulose
12 Which component is present in the cell wall of fungi?
(a) Cellulose
(b) Hemicellulose
(c) Chitin
(d) Pectin
Answer: Chitin
13 Which of the following antibiotics have their mode of action of inhibition of cell wall synthesis?
(a) Nalidixic acid
(b) Ciprofloxacin
(c) ?-lactams
(d) Norfloxacin
Answer: ?-lactams
14 What is S- layer?
(a) Secondary layer
(b) Solid layer
(c) Surface layer
(d) None of the above
Answer: Surface layer
15 Which of the following bacteria lacks cell wall?
(a) Mycoplasma pneumoniae
(b) Bacillus subtilis
(c) Staphylococcus aureus
(d) None of the above
Answer: Mycoplasma pneumoniae
16 Which of the statements are incorrect regarding plant cell wall
(a) Middle lamella is made up of pectin and lignin
(b) In certain plants, tertiary cell wall is also present which has xylan beside cellulose
(c) Secondary cell wall consists of three concentric layers (S1, S2 and S3) one after the other
(d) Primary and secondary walls are present in meristamatic cells
Answer: Primary and secondary walls are present in meristamatic cells
17 Bacteria can be divided into classes namely gram-positive bacteria and gram-negative bacteria based on their cell wall.
(a) True
(b) False
Answer: True
18 Which of the following is a aromatic polymer of phenols
(a) Cutin
(b) Lignin
(c) Chitin
(d) Pectin
Answer: Lignin
19 Which of the following statements are not true regarding cell wall
(a) Plant cell wall is made up of cellulose
(b) Plant cell wall is a non-living structure
(c) Cell was is semi-permeable
(d) Cell wall provides mechanical support to the cell
Answer: Cell was is semi-permeable
20 Chitinous cell wall is present in
(a) Fungi
(b) Plants
(c) Bacteria
(d) Protists
Answer: Mitochondria without outer membrane
21 Pectin is stained using
(a) Sudan III
(b) Ruthenium red
(c) Iodine
(d) acetocrmine
Answer: Ruthenium red
22 Cellulose is a polymer of D-glucose units joined by
(a) ? 1-4 linkage
(b) ? 1-6 linkage
(c) ? 1-6 linkage
(d) ? 1-4 linkage
Answer: ? 1-4 linkage
23 Fine cytoplasmic connections between neighbouring cells through the cell wall for cell to cell communication is called
(a) Plasmodesmata
(b) Plasmosome
(c) Mesosome
(d) None of the above
Answer: Plasmodesmata
24 Which of the following organelle is involved in cell wall synthesis
(a) Golgi apparatus
(b) Mitochondria
(c) lysosome
(d) Chloroplast
Answer: Golgi apparatus
25 Secondary cell wall of plants is
(a) Located outside the primary wall
(b) Located inside the primary wall
(c) Located just beneath middle lamellae
(d) Located inside the plasma membrane
Answer: SLocated inside the primary wall tarch
26 What is present in the cell wall of Mycobacterium tuberculosis?
(a) Acetone
(b) Cellulose
(c) Nitric acid
(d) Mycolic acid
Answer: Mycolic acid
27 Which of the following cell wall component can effectively defend against lysozyme?
(a) Chitin
(b) Peptidoglycan
(c) Pseudomurein
(d) Biogenic opal
Answer: Pseudomurein
28 Peptidoglycan is made up of __________
(a) N-acetylglucosamine
(b) N-acetylmuramic acid
(c) N-acetylglucosamine, N-acetylmuramic acid
(d) N-acetylglucosamine, N-acetylmuramic acid, amino acids
Answer: N-acetylglucosamine, N-acetylmuramic acid, amino acids
29 Teichoic acid present in Gram-positive bacteria can bind to which ion?
(a) Fe ions
(b) Mg ions
(c) Phosphorus ions
(d) Sulphur ions
Answer: Mg ions
30 Cord factor is a ___________
(a) protein
(b) carbohydrate
(c) mycolic acid derivative
(d) teichoic acid derivative
Answer: teichoic acid derivative
31 The outer membrane of the Gram-negative cell wall is anchored to the underlying peptidoglycan by means of which of the following?
(a) Phospholipids
(b) Proteins
(c) Braun’s Lipoprotein
(d) Lipopolysaccharide
Answer: Braun’s Lipoprotein
32 Which among the following acts as receptors for bacteriophage attachment in Gram-negative bacteria?
(a) O antigens
(b) Cilia
(c) Lipid A
(d) Teichoic acid
Answer: O antigens
33 Porins are special proteins act as channels in the outer membrane of Gram-negative bacteria.
(a) True
(b) False
Answer: True
34 Gram-negative bacteria are more resistant to antibiotics due to the presence of?
(a) Thin peptidoglycan wall
(b) Porin proteins
(c) Teichoic acid
(d) Outer lipopolysaccharide layer
Answer: Outer lipopolysaccharide layer
35 Which of the following are present in teichoic acids? a) ribitol residues b) glycerol residues c) glucose residues d) ribitol or glycerol residues View Answer Answer: d
(a) Cytoplasm
(b) Golgi body
(c) Nucleolus
(d) Nucleus
Answer: Nucleolus

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