Biology Chapter 1: Biomolecules: A High-Level Overview

Question 1

Nucleotides are linked together by

Answer 1

Phosphodiester bonds between the sugar base of one nucleotide and the phosphate group of the adjacent nucleotide

Question 2

The backbone of DNA

Answer 2

The phosphate sugar backbone

Question 3

The alpha helix of DNA is

Answer 3

Nitrogenous bases, forming complementary pairing

Question 4

The five prime end of DNA bears a

Answer 4

Phosphate

Question 5

The three prime end of DNA bears a

Answer 5

Hydroxyl group

Question 6

Result of second replication in Medellin and Stahl

Answer 6

50% of the DNA molecules are hybrid (one heavy strand, one light strand).
50% of the DNA molecules are fully light (two light strands).

Question 7

Where are phosopholipids made

Answer 7

Smooth endoplasmic reticulum

Question 8

Difference between micelles and liposomes

Answer 8

Liposomes = Bilayer + Hydrophilic Core (great for hydrophilic drugs)
Micelles = Single Layer + Hydrophobic Core (great for hydrophobic drugs)

Question 9

Ribosome subunits eukaryotes vs prokaryotes

Answer 9

Eukaryotes = 80 total (60 + 40 subunits)
Prokaryotes = 70 total (50+30 total)