Laboratory 4 (Genetics)

Who discovered the DNA structure?

• Francis Crick

• Friedrich Miescher

• Gregor Mendel

• James Watson

What is the hereditary material in humans and almost all other organisms?

• Protein

• RNA

• DNA

• Carbohydrate

How many common nitrogen bases are there in DNA?

• Six (6)

• Five (5)

• Four (4)

• Three (3)

What does each nucleotide in DNA consist of?

• Phosphate molecule, 3-carbon sugar, nitrogen-containing base

• Phosphate molecule, 6-carbon sugar, nitrogen-containing base

• Phosphate molecule, 5-carbon sugar, nitrogen-containing base

• Phosphate molecule, 4-carbon sugar, nitrogen-containing base

What does a defective gene in DNA indicate?

• Wrong base pairing

• Extra nucleotides

• Missing phosphate molecule

• Incorrect sugar molecule

Who identified DNA nearly 90 years earlier than the discovery of its structure?

• Gregor Mendel

• Francis Crick

• Friedrich Miescher

• James Watson

What does the sequence and type of bases along a gene specify?

• Energy production

• Cell division

• Protein synthesis

• Amino acid sequence of a protein

What are nucleotides linked together by to form the polymer nucleic acids?

• Metallic bonds

• Hydrogen bonds

• Ionic bonds

• Covalent bonds

What is DNA often referred to as?

• The control center of the cell

• The building blocks of life

• The powerhouse of the cell

• The blueprint of life

What is the role of DNA in heredity?

• Protein synthesis

• Energy production

• Cell division

• Transmission of genetic information