Seminar 1: Intro to Biology

Question 1

What are the common features shared by all forms of life?

Answer 1

-Made of a common set of chemical compounds​
-Made up of cells​
-Use molecules from the environment to synthesize new molecules.​
-Extract energy from the environment and use it to do work​
-Regulate their internal environments
-Contain genetic information that enables them to develop, function, and reproduce​
-Use a universal genetic code to build proteins​
-Exist in populations that evolve over time

Question 2

What is cell theory?

Answer 2

1. Cells are the fundamental unit of life
2. All living things comprised of cells
3. All cells come from pre existing cells
   Modern cells evolved from a common ancestor (same genetic code, chemical composition, cellular structure)

Question 3

Define cohesion

Answer 3

The tendency of molecules (or any substances) to stick together

Question 4

Define adhesion?

Answer 4

The binding of once cell or substance to another

Question 5

What is a buffer solution & its function?

Answer 5

A substance that can transiently accept or release hydrogen ions and thereby resist changes in pH.

Question 6

Draw an aldehyde (functional grp)

Answer 6

C=OH (end)

Question 7

Draw a phosphate functional group

Answer 7

O-P=O-O2

Question 8

What type of interactions are dispersion forces & why

Answer 8

Hydrophobic
Main force b/w NP molecules, causing them to CLUMP together, preventing them from interacting w/ polar molecules like H2O

Question 9

What type of interactions are dipole dipole?

Answer 9

Hydrophilic
They allow molecules w/ permanent dipoles (partially + & -) to interact w/ H2O