Genetics Lesson 6.2 BYK and How Does DNA Work? DR

Who first observed DNA?

• James Watson

• Francis Crick

• Rosalind Franklin

• Frederich Miescher

Which scientists discovered the unique structure of DNA? Choose all that apply.

• James Watson

• Francis Crick

• Rosalind Franklin

• Frederich Miescher

• Maurice Wilkins

Which would be the first step in the process that turns a DNA message into a protein?

• A section of DNA is  transcribed, or copied into mRNA, messenger  Ribonucleic Acid. mRNA is small enough to leave the nucleus.

• The mRNA carries the message  outside the nucleus to a ribosome, the organelle  where proteins are made.

• tRNA (transfer RNA) brings the correct amino acids to the ribosome where they join  together to form an amino acid chain and then a  protein.

• The two strands of DNA separate at certain  points along the strand and a section of one strand  of DNA is read.

• At the ribosome the  message is read three bases at a time. Each set  of three bases corresponds to one amino  acid.

What is the 2nd step in the process that turns a DNA message into a protein?

• A section of DNA is  transcribed, or copied into mRNA, messenger  Ribonucleic Acid. mRNA is small enough to leave the nucleus.

• The two strands of DNA separate at certain  points along the strand and a section of one strand  of DNA is read.

• The mRNA carries the message  outside the nucleus to a ribosome, the organelle  where proteins are made.

• At the ribosome the  message is read three bases at a time. Each set  of three bases corresponds to one amino  acid.

• tRNA (transfer RNA) brings the correct amino acids to the ribosome where they join  together to form an amino acid chain and then a  protein.

What is the 3rd step in the process that turns a DNA message into a protein?

• The two strands of DNA separate at certain  points along the strand and a section of one strand  of DNA is read.

• A section of DNA is  transcribed, or copied into mRNA, messenger  Ribonucleic Acid. mRNA is small enough to leave the nucleus.

• The mRNA carries the message  outside the nucleus to a ribosome, the organelle  where proteins are made.

• tRNA (transfer RNA) brings the correct amino acids to the ribosome where they join  together to form an amino acid chain and then a  protein.

• At the ribosome the  message is read three bases at a time. Each set  of three bases corresponds to one amino  acid.

What is the fourth step in the process that turns a DNA message into a protein?

• The mRNA carries the message  outside the nucleus to a ribosome, the organelle  where proteins are made.

• A section of DNA is  transcribed, or copied into mRNA, messenger  Ribonucleic Acid. mRNA is small enough to leave the nucleus.

• The two strands of DNA separate at certain  points along the strand and a section of one strand  of DNA is read.

• At the ribosome the  message is read three bases at a time. Each set  of three bases corresponds to one amino  acid.

•  tRNA (transfer RNA) brings the correct amino acids to the ribosome where they join  together to form an amino acid chain and then a  protein.

What is the final step in the process that turns a DNA message into a protein?

• The two strands of DNA separate at certain  points along the strand and a section of one strand  of DNA is read.

•  A section of DNA is  transcribed, or copied into mRNA, messenger  Ribonucleic Acid. mRNA is small enough to leave the nucleus.

• The mRNA carries the message  outside the nucleus to a ribosome, the organelle  where proteins are made.

• At the ribosome the  message is read three bases at a time. Each set  of three bases corresponds to one amino  acid.

• tRNA (transfer RNA) brings the correct amino acids to the ribosome where they join  together to form an amino acid chain and then a  protein.

What are the proteins made during protein synthesis used for?

• Proteins are used to build other cells.

• Proteins are used to determine our traits.

• Proteins are used to carry out vital functions in an organism.

• All of these choices

Molecules containing a large number of atoms.

• Micromolecules

• Macromolecules

• Polypeptide

• Monomer

Proteins that speed up chemical reactions.

• Enzymes

• Hormones

• Hemoglobin

• Keratin