Protein Structure Quiz

Jaleah is studying genetics and she comes across a DNA sequence: G A T A T C C A. She wants to find the complementary DNA strand for this sequence. Which of the following could be the correct complementary DNA strand?

• G A T A T C C A

• T G G A T A T C

• C T A T A G G T

• C U A U A G G U

Jaleah and Da'Zaria are studying for their biology exam. They come across a question in their textbook that says, 'In a sample of double-stranded DNA from a strawberry, 30% of the nitrogenous bases are cytosine.' Jontelle, who is helping them study, asks, 'What percentage of the nitrogenous bases in the sample are guanine?'

• 20%

• 30%

• 60%

• 70%

In a sample of double-stranded DNA, 25% of the nitrogenous bases are Thymine. What percentage of the nitrogenous bases in the sample are Guanine?

• 20%

• 30%

• 25%

• 75%

Kelvin and Jontelle are studying biology and they come across a diagram of an RNA molecule. Which of the following statements best describes the RNA molecule they are looking at?

• It is a double helix

• It is single-stranded

• It is made up of amino acids

• It is made up three types of nitrogenous bases

Jaleah is studying a virus that targets the DNA of a certain species of rabbits. If the virus wants to reach the rabbit's DNA, where must it attack?

• Endoplasmic reticulum

• Cytoplasm

• Cell membrane

• Nucleus

Da'Zaria is studying the DNA strand of a particular organism in her biology class. The DNA strand has the following sequence: A A C G T A A C G. Kelvin, her lab partner, asks what would be the result if this sequence is transcribed from DNA to RNA. Can you help them?

• T T G C A T T G C

• C C A T G C C A T

• U U G C A U U G C

• U U G C U U U C G

Which amino acid will form from the DNA sequence "TGT"?

• Arginine (ARG)

• Serine (SER)

• Threonine (THR)

• Cysteine (CYS)

Which amino acid will form from the RNA sequence "AUG"?

• Start/Methylene (MET)

• Serine (SER)

• Threonine (THR)

• Cysteine (CYS)

Which of the following could cause a protein to have deformed shape?

• A different DNA sequence

• A different mRNA sequence

• A different amino acid sequence

• All of the above

Which of the following could be considered a mutation?

• A thymine (T) being substituted for an adenine (A)

• A guanine (G) being deleted from the sequence.

• An extra thymine (T) being added between two adenine (A) molecules

• All of the above are considered mutations