DNA structure & replication

Multiple Choice

Why was the discovery of DNA structure significant for the field of biology?

• It helped understand genetic inheritance and molecular biology.

• It led to the invention of X-ray crystallography.

• It proved that proteins are the genetic material.

• It explained the structure of all molecules.

Multiple Choice

According to Chargaff's rules, which bases in DNA are present in equal amounts?

• Adenine and guanine

• Adenine and thymine

• Cytosine and thymine

• Guanine and thymine

Multiple Choice

Which of the following are purines and which are pyrimidines?

• Adenine and guanine are purines; cytosine, uracil, and thymine are pyrimidines.

• Adenine and cytosine are purines; guanine, uracil, and thymine are pyrimidines.

• Adenine and thymine are purines; guanine, cytosine, and uracil are pyrimidines.

• Adenine and uracil are purines; guanine, cytosine, and thymine are pyrimidines.

Multiple Choice

Watson and Crick combined the findings of which scientists to create the first 3D, double helix model of DNA?

• Franklin and Chargaff

• Franklin and Mendel

• Chargaff and Pauling

• Mendel and Watson

Multiple Select

Which of the following statements about the structure of DNA are correct?

• DNA is a double stranded helix.

• The backbone of DNA is made of sugar-phosphate.

• The center of DNA consists of nucleotide pairing.

• Both strands of DNA run in the same direction.

Multiple Choice

What is the primary source of heritable information in most organisms?

• DNA

• RNA

• Proteins

• Lipids

Multiple Select

Which of the following statements correctly describe differences between prokaryotic and eukaryotic DNA?

• Eukaryotic DNA is found in the nucleus

• Prokaryotic chromosomes are circular

• Eukaryotic chromosomes are linear

• Prokaryotic DNA is found in mitochondria

Open Ended

Explain how plasmids can be manipulated in laboratories and the significance of recombinant plasmid DNA.

Open Ended

Describe the role of plasmids in prokaryotic cells and how they contribute to genetic diversity.

Multiple Choice

What is one benefit for bacteria to exchange genes found on plasmids with neighboring bacteria?

• It helps with survival of prokaryotes

• It increases the size of the bacteria

• It makes bacteria more visible

• It destroys chromosomal DNA

Multiple Choice

Which nucleobase is found in RNA but not in DNA?

• Uracil

• Thymine

• Cytosine

• Adenine

Multiple Choice

Which of the following are correct base pairing rules for DNA and RNA?

• A=T and C=G in DNA; A=U and C=G in RNA

• A=U and C=T in DNA; A=T and C=G in RNA

• A=G and C=U in DNA; A=T and C=G in RNA

• A=U and C=G in DNA; A=T and C=G in RNA

Open Ended

Describe two structural differences between DNA and RNA based on the diagrams.

Open Ended

Where are the antibiotic resistant genes located in MRSA, and how are they transmitted to non-resistant bacteria?

Not acceptable for the start of the Semester 2. Those that are not

Kids that did try on this side

Multiple Choice

Which of the following statements correctly describes the conservative model of DNA replication?

• The parental strands direct synthesis of an entirely new double stranded molecule.

• Each parental strand makes a copy of itself.

• The material in the parental strands is randomly dispersed between daughter molecules.

• Both strands are partially conserved.

Multiple Select

Select all statements that correctly describe the semi-conservative model of DNA replication.

• Each daughter molecule contains one parental and one new strand.

• Both parental strands remain together after replication.

• The two parental strands each make a copy of itself.

• Daughter molecules contain a random mix of parental and new DNA.

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