Higher Biology - Unit 1.1

What does the backbone of DNA consist of?

• Sugar and phosphate

• Adenine and thymine

• amino acids

• hydrogen bonds

The basic units of DNA are called...

Select the 3 components of nucleotides

• Bases

• Phosphates

• Deoxyribose sugar

• Mitochondria

• Linear chromosomes

What does anti-parallel mean?

• Strands of DNA run in opposite directions

• DNA strands that persistantly intersect with each other

• Base pairing is inverted. (A pairs with G and T pairs with C)

• The DNA is stored in circular chromosomes and in the plasmids

The only part of the nucleotide that varies is...

• Base

• Deoxyribose sugar

• Phosphate

• Sugar and phosphate backbone

Which base pairs with Guanine?

Which base pairs with Adenine?

What holds the bases together?

What is the name of the DNA strand's backbone?

• Adenine tri-phosphate backbone

• Deoxyribose sugar backbone

• Guanine and cytosine backbone

• Sugar phosphate backbone

What is determined by the order of bases?