TKS DP BIO A1.2 - Nucleic Acids

What is the genetic material of all living organisms?

• RNA

• Carbohydrate

• Protein

• DNA

Tags

NGSS.HS-LS3-1

What are the components of a nucleotide?

• Pentose sugar, nitrogenous base, phosphate group

• Glucose, fatty acid, amino group

• Ribose sugar, adenine, hydroxyl group

• Deoxyribose sugar, thymine, phosphate group

Which nitrogenous base is present in RNA but not in DNA?

• Adenine

• Guanine

• Uracil

• Cytosine

How do nucleotide units link together to form a single strand of DNA and RNA?

• Through hydrogen bonds

• Through ionic bonds

• Through covalent bonds

• Through van der Waals forces

What is the role of complementary base pairing in DNA replication?

• Maintaining the base sequence during copying

• Switching on and off gene expression

• Translating mRNA into the amino acid sequence of a polypeptide

• Creating a new DNA strand as a template

What is the difference between DNA and RNA nucleotides?

• RNA nucleotides consist of A, C, G, and U but not T

• DNA nucleotides have ribose sugar while RNA nucleotides have deoxyribose sugar

• DNA nucleotides have uracil (U) instead of thymine (T)

• RNA is a double-stranded molecule while DNA is single-stranded

What is the significance of the conservation of the genetic code across all life forms?

• It maintains the characteristics of the cell and the organism

• The information stored in DNA will be translated into the same protein in all living organisms

• It allows for the storage of large amounts of data in DNA

• It ensures the accuracy of DNA replication during cell divisions

Tags

NGSS.HS-LS1-1

NGSS.HS-LS4-1

Who proposed the double helix structure of DNA?

• Erwin Chargaff

• Rosalind Franklin

• Alfred Hershey and Martha Chase

• James Watson and Francis Crick

What is the function of DNA polymerase in DNA replication?

• Unwinding the DNA double helix

• Adding new nucleotides to the growing DNA strand

• Proofreading the newly synthesized DNA strand

• Initiating the DNA replication process

How does RNA differ from DNA in terms of structure?

• RNA is single-stranded while DNA is double-stranded

• RNA contains thymine (T) while DNA contains uracil (U)

• RNA has a deoxyribose sugar while DNA has a ribose sugar

• RNA is longer and more complex than DNA