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English 20 Public

Microbiology for Non-Science Majors. Chapter 8.1 and 8.2

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#Science #Biology #Microbiology #DNA replication

These contain genetic information that isn't necessary for life, but may contain beneficial information, like drug resistance.

Plasmids

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These are the nitrogenous bases found within DNA.

Adenine, Guanine, Cytosine and Thymine

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This nitrogenous base is found only in RNA

Uracil

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This kind of bond forms the backbone of both DNA and RNA

Phosphodiester bonds.

25

If B. cereus is 30% cytosine, what percentage of it is thymine?

20%

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If B. cereus has 27% Adenine in its DNA, what percent is composed of uracil?

There's no uracil in DNA ;)

25

What is a Gene?

A specific sequence of nucleotides that code for RNA molecules or proteins.

25

What is a genome?

The complete genetic content of an organism

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What is a gene locus?

The specific location of a gene on a chromosome.

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I have genes for both green eyes and blue eyes. Is this my genotype or my phenotype?

Genotype

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What is a promoter?

The site where RNA Polymerase binds, signaling the beginning of transcription.

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What are the components of a nucleotide?

A phosphate, a pentose and a nitrogenous base

25

What are some characteristics of RNA?

Single stranded. Ribose as the pentose. Uracil is unique to RNA.

25

What are some characteristics of DNA?

Double stranded. Deoxyribose as the pentose. Thymine is unique to DNA.

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What is meant by "semiconservative" DNA replication?

Half of the new DNA strand is "conserved" from the parent strand, and the other half is newly replicated.

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This enzyme divides double stranded DNA during replication

Helicase

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