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What does DNA stand for?
A. Double nitrogen acid
D. Deoxygenated ribose acid
C. Dynamic nuclear acid
B. Deoxyribonucleic acid
Where is DNA found in a human cell?
Ribosomes
Nucleus
Cell membrane
Cytoplasm only
Which of the following best describes the shape of DNA?
Straight ladder
Circular loop
Double helix
Single helix
What is the main role of DNA?
To protect the cell
To carry genetic information
To provide energy for the cell
To digest nutrients
Which structure is DNA wrapped around to form chromosomes?
Lipids
Proteins (histones)
Sugars
Enzymes
Which nitrogenous base pairs with adenine in DNA?
Guanine
Cytosine
Thymine
Uracil
Adenine and thymine are held together by which type of bond?
Peptide bonds
Hydrogen bonds
Ionic bonds
Covalent bonds
Adenine and thymine are examples of which type of molecule?
Enzymes
Nitrogenous bases
Fatty acids
Sugars
Which nitrogenous base pairs with cytosine in DNA?
Uracil
Thymine
Guanine
Adenine
Cytosine and guanine are held together by which type of bond?
Covalent bonds
Hydrogen bonds
Ionic bonds
Peptide bonds
