7 IS 4.2

What is the first step in protein synthesis?

• tRNA attaches to mRNA

• Amino acids join in the ribosome

• mRNA enters the cytoplasm

• Protein chain forms

What is the role of mRNA in protein synthesis?

• It carries the genetic code from DNA to the ribosome

• It forms the structure of the ribosome

• It breaks down proteins into amino acids

• It transports amino acids to the ribosome

What is the final product of protein synthesis?

• DNA

• RNA

• Protein

• Lipid

What is the sequence of three nucleotides on mRNA called?

• Codon

• Anticodon

• Gene

• Chromosome

What is the main purpose of DNA in cells?

• To store genetic information

• To transport proteins

• To synthesize lipids

• To break down carbohydrates

What is the role of the anticodon in tRNA?

• It binds to the mRNA codon

• It synthesizes proteins

• It carries the genetic code

• It forms the ribosome structure

What happens to the protein chain after it is formed?

• It is immediately functional

• It undergoes folding and modification

• It is broken down into amino acids

• It is converted back to mRNA

Which protein was discovered in a Tyrannosaurus rex fossil?

• Hemoglobin

• Keratin

• Collagen

• Myosin

What year was the dinosaur protein discovered by Harvard scientists?

• 1997

• 2007

• 2017

• 2027

Which nitrogen base is found in RNA but not in DNA?

• Adenine

• Thymine

• Uracil

• Cytosine