Nucleic Acids and Their Structure

What is the role of nucleic acids?

• To carry the unique code to make proteins

• To provide energy to the cell

• To form the backbone of DNA

• To regulate cell division

What is the difference between DNA and RNA?

• DNA has two polynucleotide chains, while RNA has one

• DNA contains uracil, while RNA contains thymine

• DNA always binds with guanine, while RNA always binds with cytosine

• DNA is a more stable molecule than RNA

What are the three components of a nucleotide?

• Sugar, phosphate group, and nitrogen base

• Sugar, amino acid, and lipid

• Phosphate group, amino acid, and nitrogen base

• Sugar, lipid, and nitrogen base

What is the shape of the DNA molecule?

• Double helix

• Single strand

• Triple helix

• Spiral

Which bases always bind together in DNA?

• Adenine and thymine

• Guanine and cytosine

• Adenine and guanine

• Thymine and cytosine

What is the function of RNA?

• To assemble amino acids and make proteins

• To carry the genetic instructions for proteins

• To provide energy to the cell

• To form the backbone of DNA

What is the role of DNA in inheritance?

• To pass genetic information from parents to offspring

• To regulate cell division

• To provide energy to the cell

• To assemble amino acids and make proteins

What is the role of ATP in the cell?

• To serve as the energy currency

• To form the backbone of DNA

• To carry the genetic instructions for proteins

• To assemble amino acids and make proteins

How many known species of living organisms are there on Earth?

• 8.7 million

• 4 billion

• 100 thousand

• 1 trillion

What is the sugar-phosphate backbone of a nucleotide chain made of?

• Alternating sugar and phosphate molecules

• Alternating sugar and nitrogen base molecules

• Alternating phosphate and nitrogen base molecules

• Alternating sugar, phosphate, and nitrogen base molecules