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Bio lab exam > Bio Lab Exam > Flashcards

Bio Lab Exam Flashcards

1
Q

What is a discrete random variable?

A

Whole number or integer

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2
Q

What is a continuous random variable?

A

Any possible number

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3
Q

What is a quantitive measurement?

A

Described by numbers

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4
Q

What is a qualititave measurment?

A

Described without using numbers

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5
Q

What is Accuracy?

A

How close a set of measurements is to a known or true value

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6
Q

What is Precision?

A

How close the measurements in a data set are to each other.

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7
Q

How to calculate Percent error?

A

|experimental value- True value|
True value x 100

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8
Q

What is a solution?

A

The mixture

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9
Q

What is a solute?

A

A substance dissolved

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10
Q

What is the solvent?

A

The liquid

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11
Q

What is an aqueous solution?

A

Any solution where water is the solvent

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12
Q

What is the Concentration of a solution?

A

The amount of solute per volume of solution

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13
Q

What does Molarity represent?

A

The number of moles of solute per liter of solution

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14
Q

What is the Formula Weight?

A

The number of grams are equivalent to one mole of the solute

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15
Q

How to calculate dry solute needed?

A

g= grams/moles x moles/liters x liters

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16
Q

If you have a formula weight of 158.04 g/mol, how many grams of KMnO4 would you need to make 1 L of a 2M solution?

A

316.08 grams

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17
Q

If you have a formula weight of 158.04g/mol, how many grams of KMnO4 would you need to make 350 mL of a 0.75M of a solution?

A

41.49 grams

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18
Q

What is a dilution?

A

Made of an existing solution to create one with a lower concentration of solute

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19
Q

What are the two kinds of dilution methods?

A

Parrallel and Serial

20
Q

How to calculate a parallel dilution?

A

starting concentration x volume of starting = concentration desired x volume desired (C1V1=C2V2)

21
Q

How do you know to use a serial dilution or a parallel dilution?

A

Use a serial dilution if you are making several dilutions that share a common dilution factor, or if a single desired dillution has a much smaller concentration than the starting solution

22
Q

What is an Independent variable?

A

Things that are altered in an expierement

23
Q

What is the Dependent variable?

A

What is measured in the expierement

24
Q

Is a low PH acidic or basic?

A

Acidic

25
Q

Is a high PH acidic or basic?

A

Basic

26
Q

[H+] = 1 x 10^-3 M is what pH?

A

3

27
Q

What are the 4 things all cells have?

A

DNA, Plasma membrane, Cytosol, Ribosomes

28
Q

What is a Heterotroph?

A

Cannot make their own food, must consume food from the outside world

29
Q

What is an Autotroph?

A

Can make their own food

30
Q

What are the 3 Domains?

A

Eukarya, Bacteria, Archaea

31
Q

What are the 4 types of Eukaryotic organisms in domain Eukarya?

A

Protists, Plants, Fungi, Animals

32
Q

What is Diffusion?

A

The net movement of atoms or molecules as the result of constant random motion

33
Q

What is the Concentration Gradient?

A

Moving from high concentration to a low concentration

34
Q

What are the 3 things that effect diffusion rate?

A

Size, Temperature, The medium through which the diffusion is occuring

35
Q

How does size effect diffusion?

A

Small atoms and molecules diffuse faster than larger ones

36
Q

How does temperature effect diffusion?

A

Heat increases diffusion rate

37
Q

How does the medium effect diffusion?

A

Gas moves the fastest, Liquid moves next fastest, Sold moves the slowest

38
Q

What is Osmosis?

A

The diffusion of water across the membrane

39
Q

What is simple diffusion?

A

Diffusion that doesn’t need assisstance

40
Q

What can go through simple diffusion?

A

Gases and small lipids (Small nonpolar molecules)

41
Q

What has a hard time passing through the membrane?

A

Ions, Small polar molecules, and Large molecules

42
Q

What does isotopic mean?

A

the same on both sides

43
Q

What does Hypertonic mean?

A

The outside of the cell has a higher concentration than the inside of the cell

44
Q

What does Hypotonic mean?

A

The outside of the cell has a lower concentration than the inside of the cell

45
Q

What is movement?

A

all directions all the time

Bio lab exam (3 decks)

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