Genetic Code Common to All

In order to create pigs that glow in the dark, what would scientists need to do...

• snip the DNA from a jellyfish and add it to the DNA of the pig

• breed a jellyfish with a pig

• wait for a random mutation

• breed a light colored pig with a dark colored pig

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What is the genetic code and why is it considered universal?

• It is a set of rules by which information encoded in genetic material is translated into proteins, and it is universal because it is the same in almost all organisms.

• It is a code used by scientists to classify organisms, and it is universal because it applies to all living things.

• It is a language used by cells to communicate, and it is universal because it is understood by all cells.

• It is a system of genetic modification, and it is universal because it can be applied to any organism.

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Which of the following is a characteristic of the genetic code?

• It is ambiguous, meaning each codon can specify more than one amino acid.

• It is redundant, meaning multiple codons can specify the same amino acid.

• It is species-specific, meaning each species has its own unique code.

• It is reversible, meaning proteins can be converted back into DNA.

How many nucleotide bases form a codon in the genetic code?

• Two

• Three

• Four

• Five

Which of the following statements about the genetic code is true?

• The genetic code is different for each species.

• The genetic code is the same for all known life forms, with few exceptions.

• The genetic code is only applicable to animals.

• The genetic code changes with environmental conditions.

What is the role of mRNA in the genetic code?

• mRNA carries the genetic code from the DNA to the ribosome for protein synthesis.

• mRNA is responsible for replicating DNA during cell division.

• mRNA transports amino acids to the ribosome.

• mRNA is involved in the breakdown of proteins.

Which experiment demonstrated the universality of the genetic code?

• Meselson-Stahl experiment

• Avery-MacLeod-McCarty experiment

• Nirenberg and Matthaei experiment

• Hershey-Chase experiment

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What is a codon?

• A sequence of three nucleotides that together form a unit of genetic code in a DNA or RNA molecule.

• A protein that binds to DNA to initiate transcription.

• A type of RNA that carries amino acids to the ribosome.

• A segment of DNA that is transcribed into RNA.

Which amino acid is coded by the start codon AUG in the genetic code?

• Glycine

• Methionine

• Valine

• Leucine

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What is the significance of stop codons in the genetic code?

• They signal the start of protein synthesis.

• They signal the end of protein synthesis.

• They code for the amino acid tryptophan.

• They are involved in DNA replication.