DNA Molecule

What are the basic structural units of a DNA molecule?

• glucose molecules

• amino acids

• lipids

• nucleotides

Which scientists developed the double helix model of the DNA molecule?

• Watson and Crick

• Hardy and Weinberg

• Darwin and Lamarck

• Weismann and Miller

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NGSS.HS-LS1-1

NGSS.HS-LS4-1

Watson and Crick described the DNA molecule as a

• straight chain

• single strand

• double helix

• branching chain

Match the letter to the part.

a

b

c

d

e

Phosphate

Covalent Bond

Nitrogen Base

Hydrogen Bonds

Deoxyribose Sugar

Tags

112.42.c.7.A

A polymer commonly found in the nucleus of cells is

• ATP

• hemoglobin

• cellulose

• DNA

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NGSS.HS-LS1-1

Which molecule has the shape of a double-stranded helix?

• NANA

• DNA

• ADP

• ATP

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NGSS.HS-LS1-1

The individuality of an organism is determined by the

• sequence of nitrogenous bases in deoxyribonucleic acid

• number of amino acids in a cell

• position of the ribosomes on the endoplasmic reticulum

• number of nitrogenous bases in a codon

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NGSS.HS-LS3-1

Which of the following nucleic acids contains thymine?

• DNA, only

• Messenger RNA, only

• Transfer RNA, only

• DNA, messenger RNA, and transfer RNA

DNA is a polymer consisting of repeating units known as

• dipeptides

• nucleotides

• amino acids

• organic salts

The diagram below represents a portion of a DNA molecule.

• The letter X represents two nitrogenous bases that are identical and joined by hydrogen bonds

• The letter X represents two nitrogenous bases that are complementary and joined by hydrogen bonds

• The letter X represents two nitrogenous bases that are identical and joined by ionic bonds

• The letter X represents two nitrogenous bases that are complementary and joined by ionic bonds

Tags

NGSS.HS-LS1-1