Lab Practical Exam 1

Question 1

What type of microscope is parfocal?

Answer 1

Compound light microscope

Question 2

Types and parts of a microscope

Answer 2

1. Light Microscope
2. Electron Microscope
3. Fluorescence Microscope
4. Confocal Microscope

Question 3

Metric unit for weight?

Answer 3

gram (g)

Question 4

Metric unit for temperature

Answer 4

Celsius

Question 5

Passive transport/active transport

Answer 5

passive = no effort needed no ATP
active = requires effort and energy uses ATP

Question 6

Ocular magnification

Answer 6

ocular lens, also called the eyepiece

Question 7

Another name for a stereomicroscope

Answer 7

dissecting microscope

Question 8

What is a hypothesis?

Answer 8

a testable, educated guess or proposed explanation for an observation or scientific question

Question 9

Father of microscopy

Answer 9

Antonie Van Leeuwenhoek

Question 10

Reading of volume

Answer 10

Meniscus Rule
1. flat surface
2. get eye level
3. read the bottom of the meniscus

Question 11

Definition of bases and acids

Answer 11

acid increases the concentration of hydrogen ions in a solution
base reduces the concentration of hydrogen ions

Question 12

pH scale

Answer 12

0 to 14

Question 13

Where do new cells come from?

Answer 13

New cells come from pre-existing cells through a process of cell division

Question 14

Metric unit for volume

Answer 14

Liter (L)

Question 15

Basic unit of life

Answer 15

cell

Question 16

Definition of enzymes

Answer 16

Biological catalysts - specialized proteins that speed up chemical reactions in living organisms without being used up in the process

Question 17

Factors that affect enzymatic reactions

Answer 17

Temp, pH, Substrate Concentration, Enzyme Concentration, and Inhibitors

Question 18

Metric unit for length

Answer 18

Meter (m)

Question 19

Active site

Answer 19

The Specific region on an enzyme where the substrate binds and the chemical reaction occurs

Question 20

Where is the active site located?

Answer 20

found on the enzyme

Question 21

What binds on the active site?

Answer 21

only the correct substrate

Question 22

Definition of total magnification

Answer 22

combined magnifying power of the ocular lens and the objective lens on a microscope

Question 23

Metric conversions

Answer 23

yeah I’m not remembering all 9 of them shits I’ll just miss this question

Question 24

What is a known biological catalyst?

Answer 24

An enzyme is a protein that acts as a biological catalyst, meaning it speeds up chemical reactions in living organisms without being consumed or changed permanently.

Question 25

What is the difference between a dependent variable and an independent variable?

Answer 25

Dependent Variable - data I collect Independent Variable - I change

Question 26

Definition of metabolism

Answer 26

All the chemical reactions that build up or break down substances in the body

Question 27

What is denaturation, and two things that could denature enzymes?

Answer 27

what it is: enzyme loses shape -> loses function two things that can denature enzymes: High temp and Extreme pH

Question 28

What happens to cells placed in an Isotonic, hypotonic, hypertonic?

Answer 28

Iso = same - plant cells stay the same size and shape, animal cells stay the same Hypo = low - plant cells become turgid, animal cell swell and bust Hyper = high - plant cells pull away from the wall, animal cells shrink

Question 29

Reactant / Substrate and enzymes used

Answer 29

reactant / substrate = hydrogen peroxide. Enzyme = catalase

Question 30

Objective lenses you can use with the coarse adjustment knob

Answer 30

4x objective lens / also the called the scanning lens

Question 31

Iodine/benedicts used to test for what

Answer 31

Iodine test = starch Benedict's test = sugar

Question 32

Definition of metabolism and examples of metabolic reactions.

Answer 32

Metabolism is the sum of all chemical reactions. 2 types: anabolism - builds up molecules, catabolism - breaks down molecules

Question 33

Why do plants wilt on a hot summer day?

Answer 33

Hot day = more water loss = less pressure = wilting