Ribosomal RNA is actively synthesized in

1. lysosomes

2. nucleolus

3. nucleoplasm

4. ribosomes

What is true about ribosomes?

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

Peptide synthesis inside a cell takes place in

1. mitochondria

2. chromoplast

3. ribosomes

4. chloroplast

Which one of the following structures between two adjacent cells is an effective transport

pathway?

Which one of the following has its own DNA?

1. Mitochondria

2. Dictyosome

3. Lysosome

4. Peroxisome

The main arena of various types of activities of a cell is

1. plasma membrane

2. mitochondrion

3. cytoplasm

4. nucleus

The plasma membrane consists mainly of

1. phospholipids embedded in a protein bilayer

2. proteins embedded in a phospholipid bilayer

3. proteins embedded in a polymer of glucose molecules

4. proteins embedded in a carbohydrate bilayer

Middle lamella is mainly composed of

1. hemicellulose

2. muramic acid

3. calcium pectate

4. phosphoglycerides

Cytoskeleton is made up of

1. calcium carbonate granules

2. callose deposits

3. cellulosic microfibrils

4. proteinaceous filaments