In the cytoplasm protein synthesis is restricted to the ribosomes. Mitochondria being a semiautonomous organelle, has its own genetic machinery to synthesize its proteins.

Correct Option: C

In the cytoplasm protein synthesis is restricted to the ribosomes. Mitochondria being a semiautonomous organelle, has its own genetic machinery to synthesize its proteins.

There are only 20 amino acids. These can be arranged in different order in the polypeptide chain to form a diverse array of proteins.

Correct Option: C

There are only 20 amino acids. These can be arranged in different order in the polypeptide chain to form a diverse array of proteins.

In bacteria the chromosome or nucleoid is a naked double stranded DNA. The bacterial DNA is folded with the help of RNAs forming a super coiled circular complex. The coiling is stabilized with the help of non-histonic polyamines and a number of positively charged ions. Eukaryotic DNA is associated with histone proteins that are helpful in its coiling to form chromatin fibres.

Correct Option: B

In bacteria the chromosome or nucleoid is a naked double stranded DNA. The bacterial DNA is folded with the help of RNAs forming a super coiled circular complex. The coiling is stabilized with the help of non-histonic polyamines and a number of positively charged ions. Eukaryotic DNA is associated with histone proteins that are helpful in its coiling to form chromatin fibres.

Lecithin is a fat like substance (a phospholipid), which is a part of plasma membrane.

Correct Option: D

Lecithin is a fat like substance (a phospholipid), which is a part of plasma membrane.

An amino acid molecule consists of a central carbon bonded to an amino group (–NH₂), a carboxylic group (–COOH), a hydrogen atom and a carbon chain or ring on its sides.

Correct Option: D

An amino acid molecule consists of a central carbon bonded to an amino group (–NH₂), a carboxylic group (–COOH), a hydrogen atom and a carbon chain or ring on its sides.