During DNA replication in prokaryotes, DNA is anchored to
the cell membrane
the nuclear membrane
the nucleolus
free-floating ribosomes
Related Questions
The process by which a cell engulfs large particles or even other cells is called:
Pinocytosis
Exocytosis
Osmosis
Phagocytosis
Lipid bilayer is present in
Plasma membrane
Ribosome
Chromosome
Nucleolus
Plasma membrane helps in
Transportation of only water in and out of cell
Protein synthesis
Osmoregulation
Nucleic acid synthesis
Choose the correct statements
I. Passive cells are larger in size
II. Larger cells have lower surface volume ratio
III. To remain active, larger cells are either cylindrical in shape or possess several extensions of the cell membrane, like microvilli
IV. Microvilli are found in all those cells, which are active in absorption
V. Microvilli (membrane infoldings) occurs in transfer cells found in plants in the region of absorption or secretion of nutrients
Option containing all correct statements is
I and IV
I, II, III and IV
I, III and II
I, II, III, IV and V
The fluidity of the cell membrane is primarily influenced by the:
Amount of cholesterol present
Saturation level of fatty acid tails in phospholipids
Concentration of peripheral proteins
Presence of glycoproteins
RNA is not found in
Chromosome
Plasmalemma
Nucleolus
Ribosome
In facilitated diffusion, molecules move across the membrane with the help of:
ATP hydrolysis
Membrane proteins
Concentration gradient against their movement
Vesicle formation
The cell membrane maintains a distinct phospholipid composition between its inner and outer leaflets. Which of the following transport mechanisms is primarily responsible for establishing and maintaining this asymmetry?
Simple diffusion
Facilitated diffusion
Flippases
Ion channels
Lipid rafts are specialized microdomains within the cell membrane. Which of the following statements about their composition and function is INCORRECT?
They are enriched in cholesterol and sphingolipids.
They are involved in signal transduction and membrane trafficking.
They exhibit reduced fluidity compared to the surrounding membrane.
They are primarily composed of unsaturated phospholipids and peripheral membrane proteins.
Which of the following is NOT a primary function of cell membrane proteins?
Transporting molecules across the membrane
Acting as receptors for signaling molecules
Synthesizing lipids
Providing structural support to the membrane
