DNA structure

Cytosine always pairs with which base?

• Adenine

• Thymine

• Guanine

• Uracil

Name this structure: double helix, nucleotide, twisted ladder, hydrogen bond.

• nucleotide

• double helix

• twisted ladder

• hydrogen bond

What is the function of DNA?

• To store and transmit genetic information.

• To provide energy for cellular processes.

• To act as a catalyst in biochemical reactions.

• To transport oxygen in the blood.

What is a mutation?

• A change in the DNA sequence that can lead to changes in traits.

• A process that repairs damaged DNA.

• A type of genetic engineering technique.

• A method of cloning organisms.

What determines the specific traits in an organism?

• The sequence of nucleotide bases in the DNA molecule.

• The organism's environment and habitat.

• The diet and nutrition of the organism.

• The age and size of the organism.

What are the four nitrogenous bases in DNA?

• Adenine, Thymine, Cytosine, Guanine

• Adenine, Uracil, Cytosine, Guanine

• Adenine, Thymine, Cytosine, Uracil

• Guanine, Thymine, Cytosine, Adenine

What type of bond connects the sugar and phosphate in a DNA strand?

• Ionic bond

• Hydrogen bond

• Covalent bond

• Peptide bond

What is the difference between DNA and RNA?

• DNA is single-stranded and contains thymine; RNA is double-stranded and contains uracil.

• DNA is double-stranded and contains thymine; RNA is single-stranded and contains uracil.

• DNA contains ribose sugar; RNA contains deoxyribose sugar.

• DNA is found in the nucleus; RNA is found in the cytoplasm.

What are the building blocks of DNA?

• Amino Acids

• Nucleotides

• Fatty Acids

• Monosaccharides

Nitrogenous bases are joined by which type of bond?

• ionic bonds

• covalent bonds

• hydrogen bonds

• disulfide bonds