AP Biology Biotechnology

You briefly expose bacteria undergoing DNA replication to radioactively labeled nucleotides. When you centrifuge the DNA isolated from the bacteria, the DNA separates into two classes. One class of labeled DNA includes very large molecules (thousands or even millions of nucleotides long), and the other includes short stretches of DNA (several hundred to a few thousand nucleotides in length). These two classes of DNA probably represent

• leading strands and Okazaki fragments

• lagging strands and Okazaki fragments.

A new DNA strand elongates only in the 5ʹ to 3ʹ direction because

• DNA polymerase can only add nucleotides to the free 3ʹ end

• Okazaki fragments prevent elongation in the 3ʹ to 5ʹ direction.

Based your answer on the figure: A mutation results in a defective enzyme A. Which of the following would be a consequence of that mutation?

• an accumulation of A and no production of B and C

• an accumulation of A and B and no production of C

Tags

NGSS.HS-LS3-2

What is the enzymatic function of restriction enzymes?

• to cleave nucleic acids at specific sites

• to add new nucleotides to the growing strand of DNA

An example of selective breeding is

• a dog breeder mating 2 dogs to make more dogs

• a farmer grows bees to pollinate the plants on his farm

• a person pollinates 2 white rose plants to only create white roses

Tags

NGSS.MS-LS4-4

GMOs are leading to loss of original/ native plants because of cross breeding effecting genetic diversity

• true

• false

Tags

NGSS.MS-LS4-4

NGSS.MS-LS4-5

Genetic engineering has been used to develop bacteria strains to convert solid waste from humans and livestock into:

• Paper and tissue

• Sugar and fuel

• Salt and pepper

• Wood and fiber

Tags

NGSS.HS-LS3-2

Bioremediation using bacteria to clean oil spills primarily benefits the environment by (a)   .

• It introduces new species to the ec

• It reduces the ecosystem's biodiver

• It eliminates food sources for some

• It offers a less intrusive cleanup

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NGSS.HS-ESS3-4

NGSS.HS-LS2-7

What is the most useful change biotechnology has made in agriculture?

• Crops need more water

• Crops need more nutrients

• Crops need more time to grow

• Crops resist more diseases

What would increase the money made by farmers in North Carolina through biotechnology?

• Tomatoes that are different in color.

• Tomatoes that are smaller.

• Tomatoes that taste the same.

• Tomatoes that are resistant to disease.

Tags

NGSS.HS-ETS1-3