Chemistry of Life 1 - MT1 - Part 1

Question 1

What are the 8 properties of life?

Answer 1

1. Cellular organization
2. Reproduction
3. Metabolism
4. Growth and development
5. Homeostasis
6. Heredity
7. Response to stimuli
8. Adaptation through evolution

Question 2

When searching for extraterrestrial life through chemical signatures what do you look at?

Answer 2

The environment to see what key things that we need in order to survive

Question 3

What wont last long in the environment?

Answer 3

O2 and N2

Question 4

What needs to happen in regards to O2 and N2 in order for survival?

Answer 4

There must be ongoing release of them

Question 5

What was Orson Welles apart of and what did he want to do?

Answer 5

• Broadcasting during the war –> “panic broadcast”

- wanted to make the sound like it was really happening

Question 6

What happened during the panic broadcast?

Answer 6

People missed the beginning of the broadcast warning people that he was going to make realistic noises from the war and then when the people turned on the radio to listen to it they thought it was really happening

Question 7

What does the panic broadcast demonstrate?

Answer 7

How people react to news

Question 8

What does Stephan Hawking believe in?

Answer 8

Thinks aliens are alive

Question 9

Copernican principle

Answer 9

States that humans are not privileged observers of the universe

Question 10

All life on earth that we know of comes from where?

Answer 10

A single origin

Question 11

What evidence do we have that all life on earth comes from a single origin?

Answer 11

The universality of the genetic code

Question 12

Genetic code

Answer 12

Relationship between DNA/RNA and proteins

Question 13

What 2 things are connected on earth?

Answer 13

1. Chemistry

2. Life

Question 14

What does life/chemistry have?

Answer 14

Electrons moving around

Question 15

What do we need?

Answer 15

A chemical bases

Question 16

What are 6 attributes of life?

Answer 16

1. Living things grow and reproduce
2. Selective barrier
3. Transform matter and energy
4. Living things produce large, complicated molecules
5. Living things sense and respond to stimuli
6. Living things evolve

Question 17

What do barriers maintain?

Answer 17

An environment inside the organism/cell that is distinct in composition from the external environment

Question 18

What are selective barriers?

Answer 18

Semi-permeable membranes that allow selected materials to flow through

Question 19

What are selective barriers normally and why?

Answer 19

• normally they are gated channels

- because they have the ability to open and close

Question 20

What kind of work do organisms use?

Answer 20

Free energy

Question 21

What is free energy?

Answer 21

Energy that has the capacity to do work, that is, energy that can undertake any change in the world other than increase the random motions of particles (thermal energy)

Question 22

What can some organisms withstand?

Answer 22

A steady state of metabolism but it is not reversible

Question 23

How is energy transformed in a plant?

Answer 23

Though photosynthesis in the leafs

Question 24

What do the molecules do in heat?

Answer 24

They bump into each other

Question 25

What do the molecules do in work?

Answer 25

They move in the same direction

Question 26

Disequilibrium

Answer 26

A loss or lack of equilibrium or stability

Question 27

What is an example of sense and response to stimuli?

Answer 27

Venus fly trap

- has a specific number of hairs that need to be stimulated before it can close

Question 28

What does reproduction lead to?

Answer 28

Variation

Question 29

What does inherited variation lead to?

Answer 29

Evolution