A major site for synthesis of lipids is
1. RER
2. SER
3. symplast
4. nucleoplasm
Important site for formation of glycoproteins and glycolipids is
1. Golgi apparatus
2. plastid
3. Lysosome
4. vacuole
The osmotic expansion of a cell kept in water is chiefly regulated by
1. mitochondria
2. vacuoles
3. plastids
4. ribosomes
The motile bacteria are able to move by
1. fimbriae
2. flagella
3. cilia
4. pili
The Golgi complex plays a major role:
1. | in trapping the light and transforming it into chemical energy |
2. | in digesting proteins and carbohydrates |
3. | as energy transferring organelles |
4. | in post translational modification of proteins and glycosylation of lipids |
Select the correct statement from the following regarding cell membrane.
1. | Na+ and K ions move across cell membrane by passive transport |
2. | Proteins make up 60 to 70% of the cell membrane |
3. | Lipids are arranged in a bilayer with polar heads towards the inner part |
4. | Fluid mosaic model of cell membrane was proposed by Singer and Nicolson |
Which structures perform the function of mitochondria in bacteria?
1. Nucleoid
2. Ribosomes
3. Cell wall
4. Mesosomes
What is true about ribosomes?
1. | The prokaryotic ribosomes are 80 S, where S stands for sedimentation coefficient. |
2. | These are composed of ribonucleic acid and proteins. |
3. | These are found only in eukaryotic cells. |
4. | These are self-splicing introns of some RNAs. |
Ribosomal RNA is actively synthesized in
1. lysosomes
2. nucleolus
3. nucleoplasm
4. ribosomes
The solid linear cytoskeletal elements having a diameter of 6nm and made up of a single
type of monomer are known as
1. microtubules
2. microfilaments
3. intermediate filaments
4. lamins