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View History Bookmarks People Window Help and she x xO New Study review material × iformation Review nst%20eam%20 start%20(1). pdf Introduction to biology review: -Compare DNA vs RNA -Why does A pair with T and C pair with G? -Why does it not make sense to talk about a ‘chromosome and its copy' when referring to sister chromatids? virus can be in your neuron and be in the pes antibitoics don't help viruses reverse transcriptase is a form HIV virus because its reversed HART is highly effective because combination of drugs that target

Explanation / Answer

DNA is double stranded

Can produce RNA by transcription but not protein

RNA is single stranded

Can produce protein by translation

Adenine always pairs with Thymine with two hydrogen bonds. Hydrogen bonds can be formed between purine and pyramidine bases. Adenine is purine and thymine is pyramidine.

In case of Guanine and Cytosine three hydrogen bonds can be formed.

So based on the formation of number of hydrogen bonds, A always pairs with T and G always pairs with C

Sister chromatids are same structurally and functionally. Because they have the same kind of nucleotides, base pairing, and have the same gene on the same locus.

Sister chromatids are formed by DNA replication, one chromatid is the exact replica of other. These two sister chromatids joined together by centromere.

So chromosome and it's copy is the chromatid

DNA RNA Made up of Deoxyribonucleic acid Made up of Ribonucleic acid Contains Deoxyribose sugar contains Ribose sugar Less reactive due to the absence of oxygen at 2nd carbon of Pentose sugar highly reactive due to the presence of oxygen at 2nd carbon of pentose sugar Nitrogen bases are Adenine, Guanine , cytosine and thymine Nitrogen bases are Adenine, Guanine, Cytosine and Uracil

DNA is double stranded

Can produce RNA by transcription but not protein

RNA is single stranded

Can produce protein by translation

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