Chapter 8

What is the basis of classification of bacteria's into gram +ve or gram \(-\) ve? (a) Cell wall (b) Glycocalyx layer (c) Plasma membrane (d) All of these

A bacterial cell was taken and gram staining was done and observed that it did not take up gram stain such a bacteria is known as (a) Gram positive (b) Gram negative (c) Non-effective to gram stain (d) None of these

Which of the following statement is not true? (a) Response to gram stain is due to the cell envelop. (b) The cell envelope act as a single protective unit. (c) The glycocalyx layer is similar in all the bacteria. (d) None of these

A loose sheath of glycocalyx layer is called (a) Plasma membrane (b) Capsule (c) Slime layer (d) Cell wall

What is a thick, tough, layer of glycocalyx known as? (a) Slime layer (b) Capsule (c) Cell wall (d) Cell envelope

Which of the following is not the function of cell wall? (a) Interaction with outside world (b) Provide structural support and shape (c) Prevent from bursting and collapsing (d) Exchange of nutrition takes place through it

Which of the following is a form of mesosome? (a) Vesicles (b) Tubules (c) Lamellae (d) All of these

Which of the following is a function of mesosome? (a) Cell wall formation (b) DNA replication and its distribution to daughter cells (c) Both (a) and (b) (d) None of these

Which of the following helps in respiration, secretion process,and increase the surface area for enzymatic content? (a) Plasma membrane (b) Cell wall (c) Mesosomes (d) Glycocalyx layer

In which organisms the pigment containing chromatophores are found? (a) Algae (b) Cyanobacteria (c) Green algae (d) Amoeba

A thin, filamentous extension of cell wall required for a bacterial motility is called (a) Hook (b) Flagella (c) Tail (d) Mesosome

Which of the following is not a part of bacteria flagellum? (a) Filament (b) Hook (c) Basal body (d) None

Of all the parts of flagellum, which one is the longest? (a) Filament (b) Hook (c) Basal body (b) Fimbriae

Which of the following surface structure of bacteria does not take part in motility? (a) Flagella (b) Pilli (c) Fimbriae (d) Both (b) and (c)

Which is the elongated tubular structure made of special protein on the surface of bacterial cell? (a) Flagella (b) Fimbriae (c) Pilli (d) All of these

What is the small bristle like structures or fibres sprouting out of the cell? (a) Flagella (b) Fimbriae (c) Pilli (d) All of these

In prokaryotes, the ribosomes are associated with which structure of cell? (a) Cell wall (b) Mesosome (c) Lysosomes (d) Plasma membrane

What is the size of ribosomes? (a) \(10-20 \mu \mathrm{m}\) (b) \(15-20 \mathrm{~nm}\) (c) \(10-20 \mathrm{~nm}\) (d) \(15-20 \mathrm{~cm}\)

In 70 S prokaryotic ribosomes, what are the sub units present in them? (a) \(50 \mathrm{~S}\) and \(20 \mathrm{~S}\) (b) \(50 \mathrm{~S}\) and \(30 \mathrm{~S}\) (c) \(40 \mathrm{~S}\) and \(30 \mathrm{~S}\) (d) \(60 \mathrm{~S}\) and \(30 \mathrm{~S}\)

A polysome is a chained structure of which organelle? (a) Lysosome (b) Mesosome (c) Ribosome (d) All of these

In polyribosome, the ribosomes attach to which RNA? (a) \(\mathrm{m}\) -RNA (b) t-RNA (c) r-RNA (d) All of these

In what form, the reserve material in prokaryotic cells are stored in cytoplasm? (a) Lysosome (b) Mesosome (c) Ribosome (d) Inclusion bodies

Which of the following are not inclusion bodies? (a) Phosphate granules (b) Cyanophycean granules (c) Glycogen granules (d) Glucose granules

Gas vacuoles are found in (a) Blue-green bacteria (b) Purple bacteria (c) Green photosynthetic bacteria (d) All of these

Which of the following does not belong to eukaryote? (a) Protists (b) Bacteria (c) Fungi (d) All of these

In eukaryotic cells, why there is an extensive compartmentalization of cytoplasm? (a) Due to the presence of fibres (b) Due to the presence of so many organelles (c) Due to the presence of membranous organelles (d) All of these

The chemical studies on cell membrane that was deduced to its possible structure was mostly done on which cells? (a) \(\mathrm{WBC}\) (b) Human erythrocytes (c) Platelets (d) Cheek cells

In plasma membrane, the lipids have their polar heads facing (a) Outer side (b) Inner side (c) In the middle (d) Stable facing nowhere

The lipid component of plasma membrane will be mainly constituted of (a) Glycolipids (b) Glycogen (c) Phosphoglycerides (d) All of these

Which of the following are not the component of plasma membrane? (a) Sugar (b) Protein (c) Cholesterol (d) None of these

Which of the following membrane proteins lie on the surface of the cell? (a) Integral proteins (b) Peripheral proteins (c) Both (a) and (b) (d) Glycoproteins

Which of the following membrane proteins are partially or totally buried in cell membrane? (a) Integral proteins (b) Peripheral proteins (c) Both (a) and (b) (d) Glycoproteins

The fluid mosaic model was given by Singer and Nicolson in the year (a) 1972 (b) 1976 (c) 1982 (d) 1986

The ability of proteins to move laterally within the membrane is measured as (a) Mobility (b) Flexibility (c) Fluidity (d) None of these

For what reason, the fluid nature of membrane is important? (a) Cell growth (b) Secretions (c) Endocytosis (d) All of these

The most important function of plasma membrane is that it (a) Divides the cell (b) Gives shape to the cell (c) Transports the molecules across (d) Both (a) and (b)

In which kind of transport, the molecules move across without the utilization of energy? (a) Passive transport (b) Osmosis (c) Both (a) and (b) (d) Active transport

Movement of water across the plasma membrane occurs by (a) Passive transport (b) Osmosis (c) Active transport (d) All of these

In which kind of transport, the molecules will go against the concentration gradient? (a) Passive transport (b) Active transport (c) Facilitated transport (d) All of these

In which of the following does active transport take place? (a) Pumps (b) Carrier protein transport (c) Ion channels (d) Diffusion

The functions of cell wall in eukaryotic cells (a) Give shape to cell (b) Prevent from mechanical damage (c) Protects from infection (d) All of these

Which of the following organisms have cell wall made up of cellulose, galactans, mannans, and minerals like calcium carbonates? (a) Fungi (b) Plants (c) Algae (d) All of these

Which of the following organisms have cell wall made up of cellulose, hemicelluloses, pectins and proteins? (a) Fungi (b) Plants (c) Algae (d) All of these

Which of the following wall is capable of growth in a plant cell? (a) Primary wall (b) Secondary wall (c) Both (a) and (b) (d) Middle lamella

What is the component of middle lamella that puts the different binds neighbouring cells together? (a) Calcium phosphate (b) Sodium pectate (c) Calcium pectate (d) Sodium phosphate

A structure that is traversing the middle lamella and connecting the cytoplasm of neighbouring cells is called (a) Primary wall junction (b) Plasmodesmata (c) Desmosomes (d) Secondary wall

How many of the following are not included in endomembrane system? Endoplasmic Reticulum, Golgi complex, Lysosome, Mitochondria, Chloroplast, Vacuoles, Peroxisomes (a) 2 (b) 3 (c) 4 (d) 5

What is the network of tiny tubular structures scattered in cytoplasm as seen from electron microscope? (a) Golgi complex (b) Microtubules (c) Endoplasmic reticulum (d) Mitochondria

Which side in a cell does luminal and extra luminal compartments are situated respectively? (a) Cytoplasm, inside ER (b) Inside ER, cytoplasm (c) cytoplasm, plasma membrane (d) Nucleus, cytoplasm

Rough endoplasmic reticulum is called so due to the presence of (a) Lysosome (b) Golgi granules (c) Ribosomes (d) Protein granules