Second Periodical Test

Question 1

What should be done if a citizen has a cold before giving a DNA sample?

Answer 1

Any citizen with a cold should not give a sample.

This safeguard helps prevent the spread of illness and ensures the integrity of the sample.

Question 2

What is a proposed safeguard regarding the tools used for taking DNA samples?

Answer 2

A new scraper should be used for each citizen.

This practice minimizes the risk of contamination between samples.

Question 3

What is one of the proposed safeguards regarding health monitoring?

Answer 3

The blood pressure of each citizen should be measured.

Monitoring blood pressure can help ensure the safety of citizens during the sample collection process.

Question 4

What precaution should nurses take when collecting DNA samples?

Answer 4

Nurses taking the samples should wear safety gloves.

Wearing gloves is essential for maintaining hygiene and preventing contamination.

Question 5

What is the probability that two people (except identical twins) will have the same DNA profile?

Answer 5

1 in 100 million

Question 6

According to Gina, when is a person’s DNA made up?

Answer 6

At conception

Question 7

What did Anna say about how DNA can change?

Answer 7

DNA can be altered by mutations

Question 8

What did Tom explain about how a person receives their DNA?

Answer 8

Each person gets a new mix of DNA from each parent

Question 9

Which students provided correct explanations about DNA variety?

Answer 9

B. Anna and Tom, but not Gina

Question 10

What is a key characteristic of red blood cells?

Answer 10

Has no nucleus

Question 11

What is a key characteristic of white blood cells?

Answer 11

Has a nucleus

Question 12

What liquid do cells float in within the blood?

Answer 12

Plasma

Question 13

Fill in the blank: DNA is to be extracted from a blood sample and from _______.

Answer 13

cheek scrapings

Question 14

Why will DNA be found in both blood samples and cheek scrapings?

Answer 14

B. Both samples contain cells with nuclei

Question 15

True or False: Red blood cells contain nuclei.

Answer 15

False

Question 16

What is DNA?

Answer 16

A chemical substance that contains the instructions to build our bodies

DNA (deoxyribonucleic acid) carries genetic information essential for the growth, development, functioning, and reproduction of living organisms.

Question 17

According to the article, what is the chance that two people will have the same DNA profile, except for identical twins?

Answer 17

1 in 100 million

This statistic highlights the uniqueness of individual DNA profiles among the general population.

Question 18

Who correctly explained the variety of DNA?

Answer 18

B. Anna and Tom, but not Gina

Anna’s explanation about mutations and Tom’s explanation about inheritance are accurate, while Gina’s claim that DNA is not inherited is incorrect.

Question 19

Fill in the blank: DNA can be altered by _______.

Answer 19

[mutations]

Mutations are changes in the DNA sequence that can lead to variations in genetic traits.

Question 20

What did Gina claim about a person’s DNA?

Answer 20

That it is made up at conception and is not inherited

This statement is incorrect; DNA is indeed inherited from both parents.

Question 21

Which student said that each person gets a new mix of DNA from their parents?

Answer 21

Tom

This reflects the biological process of genetic recombination during reproduction.

Question 22

Which piece of laboratory equipment would you need to check that the fabric is conducting electricity?

Answer 22

A. Voltmeter

A voltmeter measures electrical potential difference, making it suitable for checking conductivity in fabrics.

Question 23

What does DNA profiling help police scientists accomplish in a criminal investigation?

Answer 23

It helps to identify suspects by comparing DNA samples from a crime scene to databases of convicted criminals.

DNA profiles are unique to individuals, making them a powerful tool in forensic science.

Question 24

What was the outcome when the police compared the DNA profile from the blood sample found at the crime scene?

Answer 24

No match was found in the database of convicted criminals.

This indicates that the blood may belong to a suspect not previously known to law enforcement.

Question 25

How do police scientists extract DNA from individuals for profiling?

Answer 25

By taking a harmless scraping from the inside of the cheek. ## Footnote This method is non-invasive and allows for the collection of sufficient DNA for profiling.

Question 26

What is the likelihood that two people have the same DNA profile, excluding identical twins?

Answer 26

1 in 100 million chance. ## Footnote This rarity underscores the uniqueness of individual DNA profiles in forensic investigations.

Question 27

Fill in the blank: Police are asking citizens to come forward to have their _______ analysed.

Answer 27

DNA ## Footnote This request aims to gather potential evidence that could lead to identifying the killer.

Question 28

True or False: A sound meter is used to check if fabric conducts electricity.

Answer 28

False ## Footnote A sound meter measures sound levels, not electrical conductivity.

Question 29

What is the primary purpose of the Programme for International Student Assessment (PISA)?

Answer 29

To assess educational systems worldwide by testing the skills and knowledge of 15-year-old students. ## Footnote PISA evaluates how well students can apply their knowledge to real-world problems.

Question 30

Which piece of laboratory equipment would NOT be used to check fabric conductivity?

Answer 30

B. Sound Meter ## Footnote A sound meter is irrelevant in the context of measuring electrical properties.

Question 31

What type of crime was reported in Smithville?

Answer 31

A man died from multiple stab wounds. ## Footnote This incident highlights the severity of violent crime in the area.

Question 32

What does the scientist claim about the material's ability to withstand washing?

Answer 32

The material can be washed without being damaged ## Footnote This claim can be tested through scientific investigation.

Question 33

Can the material be wrapped around objects without being damaged?

Answer 33

Yes ## Footnote This claim can be tested through scientific investigation.

Question 34

Can the material be scrunched up without being damaged?

Answer 34

Yes ## Footnote This claim can be tested through scientific investigation.

Question 35

Can the material be mass-produced cheaply?

Answer 35

Yes ## Footnote This claim can be tested through scientific investigation.

Question 36

True or False: The material can be mass-produced at a high cost.

Answer 36

False ## Footnote The scientist claims it can be mass-produced cheaply.

Question 37

Converts sound wave to audio-frequency signal

Answer 37

microphone

Question 38

magnify/increases energy of modulated carrier wave

Answer 38

amplifier

Question 39

produces radio frequency carrier wave

Answer 39

radio frequency oscillator

Question 40

transforms AF signal and RF carrier wave to a modulated carrier wave

Answer 40

modulator

Question 41

transmits and receives radio wave

Answer 41

antenna

Question 42

converts AF signal to sound energy

Answer 42

speaker

Question 43

selects the frequency of a station desired

Answer 43

tuner

Question 44

extracts AF signal from modulated carrier wave

Answer 44

demodulator

Question 45

process of radio communication

Answer 45

microphone - modulator - antenna - demodulator - amplifier - speaker

Question 46

Radio Broadcasting and Communication process

Answer 46

microphone - modulator - amplitude modulation/ frequency modulation - transmitting/ receiving antenna - demodulator - amplifier - speaker

Question 47

used in satelitte communication

Answer 47

microwaves

Question 48

used to locate, track, recognize, or detect object within a range

Answer 48

radar (microwaves)

Question 49

Identify the type of EM wave mobile phone communication

Answer 49

microwaves

Question 50

Identify the type of EM wave used to cook or heat food

Answer 50

microwaves

Question 51

Identify the type of EM wave photographs taken from satellite with special films

Answer 51

Infrared

Question 52

Identify the type of EM wave scanners that show temperature variation medical diagnosis remote controls night vision goggles auto focus cameras

Answer 52

Infrared

Question 53

Identify the type of EM wave phototherapy fiber optics (communication) red emergency light of cars

Answer 53

Visible light

Question 54

Identify the type of EM wave helps body produce vitamin D (for body calcium absorption) Too much may lead to skin cancer used in checking signature on passbook sterilizing water from drinking fountains disinfect toilets disrupts the reproductive abilities of bacteria and viruses

Answer 54

Ultraviolet Rays

Question 55

Identify the type of EM wave (long wavelength) - penetrate the flesh but not the bones - diagnosing bone fractures and tumors (short wavelength) - can penetrate even through metals - inspect welded joints for faults

Answer 55

X-rays

Question 56

WHAT IS THE EFFECT? Too much exposure to X-ray

Answer 56

damage body tissues and cancer

Question 57

Medical Use of X-rays

Answer 57

Radiographic imaging Computed tomography scan

Question 58

Identify the type of EM wave are so strong it can kill living cells used to treat cancer through radiotherapy sterilization of drinking water

Answer 58

Gamma rays

Question 59

Difference of Chemotherapy and Radiation

Answer 59

Chemotherapy - typically given intravenously - stops cell division - absorbed through entire system Radiation - localized treatment - uses high energy beams to target tumor itself

Question 60

True or False All life is dependent on small doses of EM radiation

Answer 60

True

Question 61

Identify the type of EM wave photosynthesis on plants

Answer 61

UV radiation

Question 62

process through which energy travels in the form of waves or particles through space of other medium

Answer 62

Radiation

Question 63

True or False Biological cell proliferation and differentiation cannot be affected by both AC and DC magnetic fields

Answer 63

False

Question 64

Common sources of electromagnetic fields

Answer 64

solar radiation electric current antennas

Question 65

Identify the type of EM wave camera autofocusing

Answer 65

Infrared

Question 66

Identify the type of EM wave Chatting in messenger

Answer 66

Microwave

Question 67

Identify the type of EM wave Checking bank book signature

Answer 67

Ultraviolet Ray

Question 68

Identify the type of EM wave Diagnosis of bone structure

Answer 68

X-ray

Question 69

Identify the type of EM wave Listening to your favorite radio station

Answer 69

Radio wave

Question 70

Identify the type of EM wave Sterilization of water in drinking fountains

Answer 70

UV ray

Question 71

Identify the type of EM wave Treating cancer

Answer 71

Gamma ray

Question 72

Identify the type of EM wave Watching NBA via satellite

Answer 72

Microwave

Question 73

Identify the type of EM wave Using red emergency light of cars

Answer 73

Visible light

Question 74

Identify the type of EM wave Using optic fibers in wirings

Answer 74

Visible light

Question 75

Application of Radio waves

Answer 75

Radio broadcasting

Question 76

band frequency suitable for communication over great distances

Answer 76

low frequency

Question 77

What vibrates inside the food to make friction

Answer 77

water

Question 78

Effect of Gamma rays on living things

Answer 78

High doses can kill living cells Lower doses can cause cancer in cells

Question 79

Identify the type of EM wave Treating tumors sterilizing medical tools

Answer 79

Gamma ray

Question 80

Identify the type of EM wave MRI, GPS

Answer 80

Radio waves

Question 81

Effect of Infrared on living things

Answer 81

causes burning of tissues

Question 82

Effects of Visible light on living things

Answer 82

Activates sensitive cells in the retina

Question 83

Effects of UV on living things

Answer 83

High doses can kill living cells

Question 84

Effect of Microwave on living things

Answer 84

heating of water in tissues can cause burning

Question 85

Identify the type of EM wave penetrate solids used in doctor's offices and airports

Answer 85

X-rays

Question 86

is the distance between one points of a wave to the same point in the next wave

Answer 86

Wavelength

Question 87

number of waves per unit of time

Answer 87

Frequency

Question 88

occur when the motion of the medium is parallel to the direction of the wave

Answer 88

Longitudinal waves

Question 89

have a color spectrum known as ROYGBIV

Answer 89

Visible waves

Question 90

These waves disturb matter and needs a medium to propagate

Answer 90

Mechanical waves

Question 91

top of a wave

Answer 91

Crest

Question 92

bottom of a wave

Answer 92

Trough

Question 93

maximum distance that matter is displaced from the resting position

Answer 93

Amplitude

Question 94

These waves are produced by stars and galaxies

Answer 94

EM waves

Question 95

occur when motion of the medium is at the right angles (perpendicular) to the direction of the wave

Answer 95

transverse waves

Question 96

highest energy in the visible light spectrum

Answer 96

violet

Question 97

Identify the type of EM wave utilized by insects to locate nectar

Answer 97

Ultraviolet waves

Question 98

lowest energy in the visible light spectrum

Answer 98

Red

Question 99

Identify the type of EM wave have the shortest wavelength and highest frequency

Answer 99

Gamma

Question 100

Pick the wave with higher frequency Visible light / Microwaves

Answer 100

Visible light

Question 101

Pick the wave with higher frequency Gamma ray / radio wave

Answer 101

Gamma ray

Question 102

Pick the wave with higher frequency Green light / Yellow light

Answer 102

Green light

Question 103

Pick the wave with higher frequency Infrared wave / Ultraviolet

Answer 103

Ultraviolet

Question 104

EM waves spectrum from longest wavelengths to shortest

Answer 104

Radio waves, Microwaves, Infrared, Visible light, Ultraviolet, X-rays, Gamma rays

Question 105

speed of light in a vacuum

Answer 105

3.0 x 10^8 m/s

Question 106

When looking at the image of an object placed in front of a plane mirror, where is the image?

Answer 106

behind the mirror surface

Question 107

contributed in developing equations that showed the relationship of electricity and magnetism

Answer 107

Maxwell

Question 108

Showed experimental evidence of electromagnetic waves and their link to light

Answer 108

Hertz

Question 109

Demonstrated the magnetic effect based on the direction of current

Answer 109

Ampere

Question 110

Formulated the principle behind electromagnetic induction

Answer 110

Faraday

Question 111

Showed how a current carrying wire behaves like a magnet

Answer 111

Oersted

Question 112

The ray of light approaching the mirror

Answer 112

Incident ray

Question 113

The ray of light which leaves the mirror

Answer 113

Reflected ray

Question 114

An imaginary line that can be drawn perpendicular to the surface of the mirror at the point of incidence where the ray strikes the mirror

Answer 114

Normal line

Question 115

True or False The normal line, incident ray, and reflected ray lie on the same plane

Answer 115

True