lesson 9 unit 2 a

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DNA

(or deoxyribonucleic acid) A complex molecule containing the genetic code.

RNA

(or ribonucleic acid) A nucleic acid which participates in the synthesis of proteins.

nucleic acid

A sequence of sugars, phosphates and nitrogenous organic bases: DNA and RNA.

Carrying the genetic code and determining an organism's structure and function are the functions of:

DNA

Which statement correctly relates to DNA and RNA:

RNA reads and translates the DNA code

Two bases connect the double chain of DNA like a step on a ladder.

True

Many scientists have concluded that coded information:

cannot arise by random undirected processes

Genetic codes contain:

complex information detailed instructions

The DNA molecule has a structure similar to a .

double helix

Nucleic acids carry the codes of life.

hereditary

The largest and most sophisticated molecules in a cell are _____.

nucleic acids

The connecting bases of DNA are always made of sets.

paired

What determines the coded information contained within DNA?

the sequence of bases making up the "rungs" of the ladder

Adenine pairs with , and guanine pairs with in DNA.

thymine cytosine

The sugar-phosphate backbones of DNA are connected to one another by sequences of different bases.

4


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