Alage have cell wall made up of:
1. Cellulose, galactans and mannans
2. Hemicellulose, pectins and proteins
3. Pectins, cellulose and proteins
4. Cellulose, hemicellulose and pectins
Middle lamella is mainly composed of:
1. hemicellulose
2. muramic acid
3. calcium pectate
4. phosphoglycerides
Plasmodesmata are:
1. | lignified cemented layers between cells |
2. | locomotory structures |
3. | membranes connecting the nucleus with plasmalemma |
4. | connections between adjacent cells |
The cytoskeleton is made up of:
1. calcium carbonate granules
2. callose deposits
3. cellulosic microfibrils
4. proteinaceous filaments
1. Both lipids and proteins can flip-flop
2. While lipids can rarely flip-flop, proteins cannot
3. While proteins can flip-flop, lipids cannot
4. Neither lipids nor proteins can flip-flop
1. | several ribosomes attached to a single mRNA |
2. | many ribosomes attached to a strand of endoplasmic reticulum |
3. | a ribosome with several subunits |
4. | ribosomes attached in a linear arrangement |
1. | is membrane-bound and contains storage proteins and lipids |
2. | is membrane-bound and contains water and excretory substances |
3. | lacks membrane and contains air |
4. | lacks membrane and contains water and excretory substances |
Which one of the following is not a constituent of the cell membrane?
1. Cholesterol
2. Glycolipids
3. Proline
4. Phospholipids
1. proplastids
2. glyoxisomes
3. peroxisomes
4. mitochondria