Lecture 1 Homework

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Each strand of DNA contains all the information needed to create what?

a new double-stranded DNA molecule with the same sequence information

Do disulfide bonds stabilize the structure of double stranded nucleic acids?

no

Is a phosphate bond an example of a non-covalent interaction?

no

What type of interaction occurs between stacked bases in the DNA double helix and helps to stabilize the helix?

van der Waals forces

The difference between RNA and DNA is the presence of a

2' hydroxyl group on the ribose sugar in RNA

A complete turn of the helix is __ angstroms and includes __ basepairs.

34, 10.5

Which basepair is more stable?

G-C with 3 hydrogen bonds

Which conformation does double-stranded DNA generally take in cells?

B-DNA

True/False--Does A basepair with T during transcription and U during replication?

False T during replication U during transcription

What does the polarity of a DNA strand result from?

The polarity of the nucleotide subunits

The nucleus, an organelle found in eukaryotic cells, confines the ____, keeping them separated from other components of the cell?

chromosomes

What is the primary force holding the two halves of the DNA strand together?

hydrogen bonds


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