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Biology NEET - XI: Chapter 8 - Cell the Unit of Life Part 2

Biology25 CardsCreated about 2 months ago

This deck covers key concepts from Chapter 8 of the Biology NEET curriculum, focusing on the structure and function of cell components, including cell walls, membranes, and the endoplasmic reticulum.

What makes the primary cell wall more flexible than the secondary cell wall?

Primary cell wall- more of pectin | Secondary cell wall- more of lignin
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Key Terms

Term
Definition
What makes the primary cell wall more flexible than the secondary cell wall?
Primary cell wall- more of pectin | Secondary cell wall- more of lignin
Which cell wall is deposited uniformly?
Primary cell wall
What is the tertiary cell wall made of?
Xylans
What are desmotubules of plasmodesmata made of?
Endoplasmic reticulum
What is the tonoplast in a plant cell?
The living semi-permeable single membrane of a vacuole
Does the transport of material across the tonoplast occur against or along the concentration gradient?
Against

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TermDefinition
What makes the primary cell wall more flexible than the secondary cell wall?
Primary cell wall- more of pectin | Secondary cell wall- more of lignin
Which cell wall is deposited uniformly?
Primary cell wall
What is the tertiary cell wall made of?
Xylans
What are desmotubules of plasmodesmata made of?
Endoplasmic reticulum
What is the tonoplast in a plant cell?
The living semi-permeable single membrane of a vacuole
Does the transport of material across the tonoplast occur against or along the concentration gradient?
Against
Where are anthocyanins stored in a plant cell?
Vacuole
Who discovered the plasma membrane?
Schwann
What is the composition of cell membrane?
40% lipids | 52% proteins | 8% carbohydrates
Who proposed the sandwhich theory of plasma membrane?
Danielli and Davson
What is the width of the plasma membrane according to the sandwhich theory?
20 Å Protein layer, 35 Å lipid bilayer, 20 Å Protein layer
Which is the most common phospholipid found in cells?
Lecithin
Who proposed the fluid mosaic model?
Singer and Nicolson
What is the difference in the amount of cholesterol find in plant and animal cell membranes?
Plant cell membranes have less cholesterol or sometimes no cholesterol as compared to animal cell membranes.
What is the function of cholesterol in plasma membrane?
Cholesterol provides stability to the cell membrane.
Lateral movements happen between which layers of cell membrane?
Same layers
What regulates the permeability of cell membrane?
Calcium ions
Sodium potassium pump is the example of which type of active transport?
Direct active transport
SGLT (intestinal mucosa sodium glucose transport) is the example of which type of active transport?
Indirect active transport
GLUT is an example of which type of transport?
Facilated transport
What type of membrane binds the endoplasmic reticulum?
Single membrane
Who discovered the endoplasmic reticulum?
Porter
In which cells is endoplasmic reticulum poorly developed?
In rapidly dividing cells- sperms, ovum and RBCs
What are the structural forms of ER?
Vesicles, tubules and cisternae
How is the larger unit of ribosome attached to RER?
With glycoproteins= ribophorin I and II