Genetic Code Common to All

How does molecular biology support evolution?

• molecular biology supports the claim that all forms of life use the same genetic language of DNA and RNA, and the genetic code is essentially universal. thus it is likely that many species descended from one or a few common ancestors that used this code

• comparative embryology expresses that we all start the same, but as we grow and develop in the womb different body parts grow to have different functions than other animals might have

• comparative anatomy illustrates that evolution is a remodeling process in which ancestral structures that originally functioned in one capacity become modified as they take on new functions

• By arranging fossils in chronological order, gradual changes in organisms can be observed. This provides evidence because it shows how species have changed and developed over billions of years.

• the study of genetics at the molecular level; illustrates the differences or similarities in DNA

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Which process describes when scientists use technology to change the genetic code of an organism?

• selective breeding (artificial selection)

• natural selection

• genetic mutations

• genetic engineering

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What is the genetic code common to all living organisms?

• DNA and RNA

• Proteins

• Lipids

• Carbohydrates

Which of the following best describes the universality of the genetic code?

• It is unique to each species

• It varies between plants and animals

• It is shared by all known life forms

• It is only found in mammals

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How does the universality of the genetic code support the theory of evolution?

• It suggests a common ancestor for all life

• It shows that all organisms have the same number of genes

• It indicates that all life forms have identical DNA sequences

• It proves that all species evolve at the same rate

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Which molecule is primarily responsible for carrying the genetic code in cells?

• RNA

• DNA

• Protein

• Lipid

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What is the significance of the genetic code being universal?

• It allows for genetic engineering across species

• It limits the diversity of life

• It prevents mutations

• It restricts evolution

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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 the role of mRNA in the genetic code?

• To replicate DNA

• To transport amino acids

• To carry genetic information from DNA to ribosomes

• To form the structure of ribosomes

Which of the following is a real-world application of the universal genetic code?

• Creating synthetic organisms

• Developing new antibiotics

• Designing new ecosystems

• Predicting weather patterns