Exploring DNA and Genetics Concepts

What is the basic structural unit of DNA?

• Nucleotide

• Amino acid

• Fatty acid

• Monosaccharide

Who were the scientists credited with proposing the double helix model of DNA?

• Watson and Crick

• Darwin and Wallace

• Mendel and Franklin

• Avery and Hershey

What is an allele?

• A version of a gene

• A type of protein

• A sugar molecule

• A cell organelle

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Which of the following is a potential ethical concern related to synthetic biology?

• Creating organisms with new traits

• Using microscopes in labs

• Growing plants in soil

• Observing animal behavior

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What type of evidence do scientists use to study evolutionary relationships among species?

• Fossil records and DNA analysis

• Weather patterns

• Plant height

• Soil composition

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Which nitrogenous base pairs with adenine in DNA?

• Thymine

• Guanine

• Cytosine

• Uracil

Which scientist’s X-ray diffraction images contributed to the discovery of DNA’s structure?

• Rosalind Franklin

• Charles Darwin

• Gregor Mendel

• Barbara McClintock

If an organism has two different alleles for a trait, what is this called?

• Heterozygous

• Homozygous

• Dominant

• Recessive

Which of the following is an example of synthetic biology?

• Engineering bacteria to produce insulin

• Observing plant growth

• Drawing a cell diagram

• Counting chromosomes

What can fossil records show about organisms?

• Changes in species over time

• The weather in a region

• The color of living animals

• The taste of plants

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