Semester 2 Exam Rev - Vet Labs

Question 1

The effect of ethylene on fruit

Answer 1

Gaseous plant hormone that plays an important role in inducing the ripening process for many fruits, together with other hormones and signals.

Question 2

What type of substance is ethylene

Answer 2

Gas

Question 3

Why is slowing down the fruit ripening process important?

Answer 3

To preserve the fruit as the ripening process can quickly lead to the fruit rotting

Question 4

The difference between independent, dependent and controlled variables

Answer 4

Independent variable - A variable that you can manipulate
Dependent variable - A variable that is changes due to the independent variable
Controlled variable - A variable that is set by you and does not change / can not be manipulated

Question 5

The different steps in designing an investigation

Answer 5

1. Determine your specific research question
2. Define the variables
3. Form a hypothesis
4. Choose a design type
5. Create a test group
6. Collect research
7. Repeat the experiment

Question 6

The difference between aim and hypothesis

Answer 6

An aim is what it is trying to achieve, while a hypothesis is a specific prediction of what it will find.

Question 7

What is the purpose of a titration?

Answer 7

The purpose of titration is to determine the concentration of a substance by reacting that substance with another substance of known concentration in a reaction.

Question 8

What is the importance of concordant titres?

Answer 8

A concordant titre is done to minimize the effect of random error and improve the precision result

Question 9

What are the equipments involved in performing a titration

Answer 9

beakers, Erienmeyer flasks, pipettes, and burettes.

Question 10

Define aliquot

Answer 10

A piece of a larger whole, particularly one extracted for chemical analysis or other treatment

Question 11

Define analyte

Answer 11

The “unknown” solution for which you would like to know the concentration of

Question 12

Define titrant

Answer 12

A solution of known concentration that is added to the unknown concentration solution

Question 13

What is the importance of body language?

Answer 13

Assists in understanding and decoding what the person is saying / meant to say before saying

Question 14

Identify examples of good body language

Answer 14

1. Body leaning into convo
2. Positively expressive hand movements
3. Smile
4. Eye contact

Question 15

Identify examples of bad body language

Answer 15

1. Angry face
2. Avoiding eye contact
3. Crossed arms
4. Looking down

Question 16

Difference between verbal and nonverbal communication

Answer 16

Verbal - Spoken or Written words to express yourself

Non-verbal - Body language, Facial expressions to express yourself

Question 17

The importance of summarising messages for others

Answer 17

To condense a senders message into a short and concise sentence which reduces reading time

Question 18

Autocratic

Answer 18

• One-way communication
• No employee feedback

Question 19

Democratic

Answer 19

• Welcome and value others’ input
• Rely heavily on team participation
• Allows decisions from employees

Question 20

Laissez faire

Answer 20

• Emphasizes delegation and minimal supervision
• Distributes workload to all employees

Question 21

Purpose of a purchase order

Answer 21

• To keep track of what you have bought just in case you need to show it to your supervisor/manager

Question 22

The purpose of an iodine stain

Answer 22

To determine if the substance/ fruit contains starch and how much starch is present

Question 23

What is the purpose of a purchase order

Answer 23

To control the purchasing of products and services from external suppliers

Question 23

How to identify the meniscus of a liquid

Answer 23

the middle of the fluid

Question 24

The difference between the aim of an experiment and its hypothesis

Answer 24

The aim is a summary of the goal or purpose of the research The hypothesis is a predictive, testable statement about what the researcher expects to find in the study.

Question 25

Define transcription error and give one example

Answer 25

Occurs when data are inaccurately entered e.g - mistake in numbers for experiment result

Question 26

2 ways to ensure data is entered correctly

Answer 26

1. Double-Check 2. Proof-read data

Question 27

2 advantages of storing data on computers compared to paper-based systems

Answer 27

1. More compact storage compared to having stacks of paper 2. Allows for easy access and editing

Question 28

How to Identify a ripe and unripe fruit using examples

Answer 28

Ripe - Has a stronger smell due to the ripening hormones being produced, the fruit is darker/brighter in colour as it undergoes the ripening process, the taste is also stronger then an unripe fruit - e.g browning of banana and softening Unripe - Has a faint smell and is usually green and firm, the fruit will have no taste or unpleasant taste - e.g green banana means it has not ripened yet