Universal Features of Life

Question 1

Nature’s most abundant organic substance

Answer 1

Carbohydrates

Question 2

Fuel storage and building material in cells; which macromolecule

Answer 2

lipids

Question 3

Biochemistry of Nucleic Acid
Building Blocks: Nucleotide =

Answer 3

N base + Pentose Sugar + Phosphate

Question 4

The double helix has a diameter of

Answer 4

20 Å

Question 5

Each complete turn of the helix is 34 Å (10 bases)

Question 6

alternating major groove with a smaller minor groove

Question 7

Characteristics of the Genetic Code

Answer 7

1. Triplet Code
2. Start/Stop Signal
3. Universal Code
4. Non-ambiguous Codons
5. Commaless
6. Polarity
7. Non-overlapping Code
8. Degeneracy of Code
9. Collinearity
10. Cistron-Polypeptide Parity

Question 8

Exceptions to the Genetic Code

Answer 8

1. Start/Stop Signal
2. Universal Code
3. Non-overlapping Code (фx174 )

Question 9

is a visual representation of the relationship between different organisms

Answer 9

Phylogenetic Tree