Back to FlashcardsBiology / Biology NEET - XI: Chapter 8 - Cell the Unit of Life Part 2
What makes the primary cell wall more flexible than the secondary cell wall?
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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
Related Flashcard Decks
| 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 |
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 |