DNA&RNA

What is the role of tRNA in protein synthesis?

• tRNA transports specific amino acids to the ribosome during protein synthesis, matching them to the corresponding codons on the mRNA.

• tRNA synthesizes mRNA from DNA during transcription.

• tRNA acts as a catalyst for the formation of peptide bonds between amino acids.

• tRNA is responsible for the replication of DNA during cell division.

What are the four nitrogenous bases in DNA?

• Adenine (A), Thymine (T), Cytosine (C), Guanine (G)

• Adenine (A), Uracil (U), Cytosine (C), Guanine (G)

• Adenine (A), Thymine (T), Cytosine (C), Uracil (U)

• Guanine (G), Thymine (T), Cytosine (C), Adenine (A)

What is DNA?

• A type of protein that provides energy to cells.

• A molecule that carries genetic instructions for life.

• A carbohydrate that stores energy in living organisms.

• A lipid that forms cell membranes.

What is the significance of the sequence of base pairs in DNA?

• It determines the color of an organism's skin.

• It encodes hereditary information and determines an organism's traits.

• It is responsible for the speed of an organism's metabolism.

• It has no significant role in genetics.

What is the role of mRNA in protein synthesis?

• mRNA carries the genetic code from DNA to the ribosome, where proteins are synthesized.

• mRNA helps in the replication of DNA.

• mRNA is responsible for the folding of proteins after synthesis.

• mRNA transports amino acids to the ribosome.

What is the primary function of DNA?

• To store and transmit genetic information that directs the synthesis of proteins.

• To provide energy for cellular processes.

• To act as a structural component of cell membranes.

• To facilitate the transport of nutrients across cell membranes.

How do nitrogenous bases pair in DNA?

• Adenine pairs with cytosine (A-C) and thymine pairs with guanine (T-G)

• Adenine pairs with thymine (A-T) and cytosine pairs with guanine (C-G)

• Adenine pairs with guanine (A-G) and thymine pairs with cytosine (T-C)

• Cytosine pairs with thymine (C-T) and guanine pairs with adenine (G-A)

What is the structure of DNA?

• DNA has a single-stranded structure.

• DNA has a double helix structure, resembling a twisted ladder.

• DNA is a linear molecule with no specific shape.

• DNA is a circular structure found in prokaryotes.

What is a gene?

• A gene is a segment of RNA that helps in protein synthesis.

• A gene is a segment of DNA that contains the instructions for making a specific protein or set of proteins.

• A gene is a type of cell that carries genetic information.

• A gene is a molecule that provides energy for cellular processes.

What are the building blocks of DNA?

• Amino acids

• Nucleotides

• Fatty acids

• Monosaccharides