WorksheetsPLASMA MEMBRANE
Total questions: 30
Worksheet time: 3hrs 30mins
First non-living cells were discovered in cork cells by which scientist?
Robert Brown
Anton von leeuwenhoek
Robert Hooke
None of the above
The first living cell was observed by :
Robert Hooke
Anton von leeuwenhoek
Robert Brown
None.
Cytoplasm consists of Cytosol (cytoplasmic matrix) and Organelles.
True
False
omnis cellula e cellula is given by :
Schleiden
Schwann
Rudolf Virchow
All of the above
Cell doctrine is given by :
Schleiden
Schwann
Rudolf Virchow
Both Schleiden and Schwann
The correct order of evolution is:
Chemoheterotrophs ;Chemoautotrophs ; Photoautotrophs.
Chemoautotrophs ; Photoautotrophs ; Chemoheterotrophs
Photoautotrophs ;Chemoheterotrophs; Chemoautotrophs
None.
As Prokaryotes develop into Eukaryotes , some of the major changes takes place. These include:
Development of chromosomes for more DNA.
Development of Organelles.
Symbiotic Association for aerobic metabolism and Photosynthesis.
All of the above.
Plasma membrane is a :
Semi-permeable membrane
Selectively permeable membrane.
Both
None
Choose the wrong model given to explain the structure of plasma membrane by various scientists .
Davson and Daniel- Trilama Model.
Gorter and Grendel- Plasma membrane is made of Lipid Unilayer .
Robertson Model- Unit membrane model
Singer and Nicolson- Fluid Mosaic Model.
Choose the wrong statement about Plasma Membrane:
Plasma membrane has the mosaic arrangement of proteins embedded throughout the lipid bilayer and has fluid movement of lipids and proteins.
The proteins and lipids are free to move laterally in plasma membrane as well as can move freely from one face of bilayer to another.
The plasma membrane composition of lipids and proteins is different for different Cell types.
Carbohydrates are abundantly present on the outer surface of plasma membrane.
The primary force responsible for stabilising the the lipid bilayer is :
Vanderwaal nteractions.
Hydrophobic interactions.
Hydrophilic interactions.
Covalent interactions.
Which lipid is known as Lecithin?
Phosphotidylserine
Phosphotidylcholine.
Phosphotidylethanolamine
Sphingomyelin
The most abundant glycerophospholipid in the plasma membrane is :
Phosphatidylserine
Phosphatidylethanolamine
Phosphatidylcholine
Phosphatidylinositol
The charge on Phosphatidylcholine is :
plus
minus
no charge
all.
The charge on Phosphatidylethanolamine is :
Plus
Minus
No charge
None
The charge on Phosphatidylinositol and phosphatidylserine is:
Both positive
Both Negative
Positive and Negative both
None.
The simplest glycolipid is :
Cerebroside
Globoside
Ganglioside
Neuraminic acid
Sterol present in Mycoplasma is :
Ergesterol
stigmasterol
sitosterol
Cholesterol
Choose the wrong statement regarding Lipid Rafts:
Detergent resistant
Homogenous
Relatively ordered
Sphingolipid enriched
The function of Lipid rafts involves:
Signal Transduction
Endocytosis
Cholesterol Trafficking
T-cell signalling machinery
All of the above
The hollow solvent filled vesicles of Lipid bilayer present in water that are self sealing is known as:
Bilayer
Micelle
Lysosome
Liposome
The Lipid bilayer is asymmetric . Choose the correct statement below:
Phosphatidylserine and Phosphatidylethanolamine are present on the non cytosolic leaflet of P.M.
Phosphatidylcholine and Sphingomyelin are present on the cytosolic leaflet of P.M.
Phosphatidylserine moves to cytosolic leaflet during apoptosis.
All statements are wrong.
The following image draws the following correct conclusions , EXCEPT :
Flippase is a P-Type ATPase.
Floppase is ABC type ATPase.
Scramblase is a ATPase that transports in both direction.
Scramblase activity rises with increase in cytosolic calcium concentration.
The Gel to liquid phase transition will takes place when the lipid bilayer has following properties:
1. Saturated fatty Acids
2. Unsaturated Fatty acids
3. Long chain fatty acids
4. Short chain Fatty acids
5.Presence of Cholesterol
6. Absence of Cholesterol
1 ,3 ,5.
1 , 4 , 5.
2, 3, 6.
2, 4 , 6.
All the statements about Peripheral proteins are correct ; EXCEPT:
Can be released by gentle extraction procedures.
They interact by Non-Covalent interactions to lipids or Proteins.
They are also known as Extrinsic Proteins.
They interact by Covalent interactions to lipids or Proteins.
They are soluble in Aqueous solutions.
The examples of Extrinsic protein is:
Porin
Ankyrin
Glycophorin
CFTR
The diagram may show the following protein:
GLUT
Band 3
Glycophorin
Spectrin
Myristoyl lipids Binds to lipid linked Proteins . Which statement is correct?
Myristoyl lipids Binds to lipid linked Proteins by Amide linkage at N-terminus of Glycine , intracellularly.
Myristoyl lipids Binds to lipid linked Proteins by Thioether linkage at N-terminus of Cysteine , intracellularly.
Myristoyl lipids Binds to lipid linked Proteins by Amide linkage at N-terminus of Glycine , Extracellularly.
Myristoyl lipids Binds to lipid linked Proteins by Amide linkage at C-terminus of Cysteine , intracellularly.
A hydropathy plot is used to determine:
Hydrophobic regions of Protein
Hydrophilic regions of protein
Hydrophobic and hydrophilic regions of Protein sequence.
the sequence of a protein.
H- antigen is converted to A- antigen with the help of an enzyme:
GalNAc transferase
Gal transferase
GalNAc isomerase
Gal oxidoreductase
