Lecture 5 - What are Cells?

Question 1

How many cells does a unicellular organism have?

Answer 1

one cell <3

Question 2

Which organism has a few cells?

Answer 2

Bacteria

Question 3

What would a bacteria produce if given sunlight?

Answer 3

SUGAR

Question 4

What was a bacteria given if it produced amino acids?

Answer 4

Nitrogen

Question 5

How many cells does a multicellular organism have?

Answer 5

many cells. Examples are literally any plant or animal.

Question 6

How many bacterial cells you got?

Answer 6

50% of your cells are bacterial.

Question 7

Where are bacterial cells mainly present?

Answer 7

On skin, in your gut, but no where else

Question 8

Why are most cells small?

Answer 8

To allow for more surface area in order to absorb nutrients brought in for the growth of the cell. If the cell is small, it has a bigger surface area but a smaller volume to support therefore win win.
Essentially surface area > volume

Question 9

How many different types of cells are there?

Answer 9

200 different types.

Question 10

What surrounds cells? Why?

Answer 10

A layer of plasma. It contains the cell’s contents and acts as barrier, only allowing specific molecules to enter or leave. Also its very flexible