Question 1

Most veins carry deoxygenated blood from the different parts of the body to the heart. Which veins carry oxygenated blood?

Accepted Answer

pulmonary vein

Answer

inferior vena cava

Answer

superior vena cava

Answer

renal vein

Question 2

Which of the following parts of the respiratory system looks like a bunch of grapes where the exchange of gases occurs?

Accepted Answer

alveoli

Answer

bronchi

Answer

trachea

Answer

larynx

Question 3

How will you describe the movement of the diaphragm in the inhalation and exhalation process?

Accepted Answer

The diaphragm contracts during inhalation and relaxes during exhalation.

Answer

The diaphragm relaxes during inhalation and exhalation.

Answer

The diaphragm relaxes during inhalation and contracts during exhalation.

Answer

The diaphragm contracts during inhalation and exhalation.

Question 4

Which is the correct order of airflow during exhalation?

Accepted Answer

alveoli, bronchus, bronchi, trachea, larynx, pharynx, nasal cavity or nose

Answer

pharynx, trachea, bronchus, bronchi, larynx, alveoli, nasal activity or nose

Answer

nasal cavity or nose, bronchi, trachea, pharynx, larynx, alveoli, bronchus

Answer

nose or nasal cavity, pharynx, larynx, trachea, bronchi, bronchus, alveoli

Question 5

Why is the blood that flows from the lungs to the heart bright red and not dark red?

Accepted Answer

oxygen makes it bright red

Answer

carbon dioxide makes it bright red

Answer

lungs add pigment to the blood

Answer

blood is always bright red

Question 6

Which type of blood circulation is described when the heart pumps oxygenated blood to the different parts of the body?

Accepted Answer

systemic circulation

Answer

lymphatic system

Answer

blood pressure

Answer

pulmonary circulation

Question 7

Oxygen (O₂) and carbon dioxide (CO₂) are exchanged among the cells, in the blood, and air in the lungs. Which of the following refers to this process?

Accepted Answer

respiration

Answer

digestion

Answer

circulation

Answer

excretion

Question 8

How will you detect if you have Chronic Obstructive Pulmonary Disease?

Accepted Answer

on and off high fever with difficulty in breathing

Answer

colds and coughing in three days

Answer

sleep disturbances

Answer

a week of cough with phlegm

Question 9

Why should a person quit smoking?

Accepted Answer

It raises blood pressure and leads to constriction of blood vessels.

Answer

It keeps the person awake and alert for several hours.

Answer

It carries more oxygen by the blood throughout the body.

Answer

It leads to slower heart rate when rising from more consumption.

Question 10

Diseases in the respiratory and circulatory systems can be prevented with a healthy lifestyle. Which among the given practices best prevents man from these diseases?

I. Eating a balanced diet

II. Avoiding vices

III. Proper hygiene

IV. Regular exercise

Accepted Answer

I, II, III, and IV

Answer

I and III

Answer

I and II

Answer

I, III, and III

Question 11

How does smoking affect your lungs?

Accepted Answer

smoking inflames and irritates the lungs.

Answer

smoking kills the brain cells only.

Answer

smoking can cause increase the number spaces and blood vessels in the lungs

Answer

smoking increases the number of tiny hairs or cilia.

Question 12

Why do we need to check a person’s vital signs?

Accepted Answer

to check if a person is healthy.

Answer

to determine the presence of chronic diseases.

Answer

to check the amount of nicotine present in the blood

Answer

to check if the white blood cell increases in the blood.

Question 13

Bases in a DNA are complementary. Which is true of its complementary base if there are 35 Thymine in the DNA strand?

Accepted Answer

there will be 35 Adenine bases

Answer

only 25 Adenine, since a DNA is helical

Answer

cannot be determined

Answer

there will be 35 Guanine bases

Question 14

Which of the following BEST describes a gene?

Accepted Answer

It is a segment of DNA.

Answer

It is smaller than DNA.

Answer

It is DNA.

Answer

It is a tightly coiled DNA

Question 15

Which of the following is TRUE about a chromosome?

Accepted Answer

it is a protein packed DNA

Answer

it is a double helical molecule

Answer

it is a segment of DNA

Answer

it is smaller than a gene

Question 16

A heterozygous allele shows a phenotype that is intermediate of the two homozygous phenotypes being crossed. Neither allele is dominant over the other. Which Non-Mendelian pattern of inheritance is referred to?

Accepted Answer

incomplete dominance

Answer

co-dominance

Answer

multiple Alleles

Answer

sex-Linked trait

Question 17

Tan colored birds are the result of the cross between a white (W) and a brown (B) colored bird. If the offsprings are 50% tan and 50% white, what are the genotypes of their parents?

Accepted Answer

BW x WW

Answer

BW x BW

Answer

BB x BB

Answer

BB x WW

Question 18

Which of the following explains the non-Mendelian inheritance wherein traits are expressed independently like the coat color of cats.

Accepted Answer

co-dominance

Answer

sex – linked

Answer

multiple alleles

Answer

incomplete dominance

Question 19

Which of the following explains the non-Mendelian trait that results in blended colors of flowers of some plants.

Accepted Answer

incomplete dominance

Answer

sex – limited

Answer

co-dominance

Answer

multiple Allele

Question 20

For blood types, if one parent is heterozygous A and the other parent is heterozygous B, what could be the possible blood types of children?

Accepted Answer

A, AB, B, and O

Answer

A, B, and O

Answer

A, AB, and A

Answer

A and O

Question 21

How many phenotypes are there in a human blood group system?

Accepted Answer

4

Answer

8

Answer

3

Answer

6

Question 22

Which of the following happens to form gametes (sex cells) among male and female organism?

Accepted Answer

meiosis

Answer

fertilization

Answer

reproduction

Answer

mitosis

Question 23

What happens when sex chromosomes of males have a gene for colorblindness?

Accepted Answer

males will become colorblind

Answer

males sometimes become colorblind or carrier

Answer

males are normal vision

Answer

males will become carrier

Question 24

If Roberto’s father has hemophilia and his mother is a carrier, what is the chance that Roberto would inherit the disease?

Accepted Answer

25%

Answer

75%

Answer

100%

Answer

50 %

Question 25

How much percent would be the chance of the children to inherit hemophilia if a mother has hemophilia (X^hX^h) and the father is non-hemophilic (X^HY)?

Accepted Answer

50%

Answer

0%

Answer

75%

Answer

25%

Question 26

A grass plot with an area of 4 square inches is occupied by 100 termites. What is the population density?

Accepted Answer

25 Termites per sq. inch.

Answer

0.004 Termites per sq. inch

Answer

100 Termite per sq. inch.

Answer

0.04 Termites per sq. inch.

Question 27

Which of the following determines the number of individual species per unit area or volume at a given time?

Accepted Answer

density

Answer

demographics

Answer

dispersion

Answer

age structure

Question 28

Philippine monkey-eating eagle, Visayan warty pig and Tamaraw are species of animals classified as:

Accepted Answer

critically endangered

Answer

extinct

Answer

threatened

Answer

vulnerable

Question 29

Which human activities do not support the government program in the prevention of extinction among organisms?

Accepted Answer

draining a swamp for agricultural purposes

Answer

conserving natural resources

Answer

reforestation campaign

Answer

breeding endangered animals in captivity

Question 30

Which of the following species are considered to be facing a very high risk of extinction in the wild?

Accepted Answer

Endangered species

Answer

Extinct species

Answer

Critically endangered species

Answer

Vulnerable species

Question 31

A leaf exposed to the sun was submerged in denatured alcohol and was boiled in a water bath. After rinsing the leaf with water, drops of iodine solution were added. The leaf turns bluish black. Which of the following indicates the change in the leaf?

Accepted Answer

starch

Answer

protein

Answer

minerals

Answer

lipids

Question 32

What function does chlorophyll play in the process of photosynthesis?

Accepted Answer

it captures light energy from the sun

Answer

it forms ATP

Answer

it breaks down CO2

Answer

it breaks down water molecules

Question 33

In the food making process, plants absorb water (H₂O) and Carbon dioxide (CO₂) to release oxygen (O₂) and produce glucose (C₆H₁₂O₆). In which part of photosynthesis is oxygen released?

Accepted Answer

Light-dependent reaction

Answer

Dark reaction

Answer

Light independent reaction

Answer

Calvin cycle

Question 34

Which of the following functions is the role of mitochondria in the process of respiration?

Accepted Answer

It produces ATP from glucose

Answer

it breaks down water molecules

Answer

it captures light energy from the sun

Answer

It forms ATP from water

Question 35

Which are required to start the process of cellular respiration?

Accepted Answer

Oxygen and glucose

Answer

Oxygen and Water

Answer

ATP and NADPH₂

Answer

CO₂ and chlorophyll

Question 36

Which of the following does NOT happen during cellular respiration?

Accepted Answer

breakdown of glucose into ATP and NADPH

Answer

energy in a form of ATP is produced

Answer

Krebs cycle release carbon dioxide

Answer

breakdown of glucose into pyruvate

Question 37

Which is NOT needed by the cell to start the Calvin cycle?

Accepted Answer

oxygen

Answer

ATP

Answer

NADPH

Answer

Ribulose biphosphate

Question 38

How is the process of photosynthesis related to cellular respiration?

Accepted Answer

Photosynthesis and cellular respiration are processes that are interdependent to each other

Answer

Photosynthesis and cellular respiration are processes taking place in mitochondria

Answer

Photosynthesis and cellular respiration are processes taking place in chloroplast

Answer

Photosynthesis and cellular respiration are processes starting with glycolysis

Question 39

Why is water necessary in photosynthesis?

Accepted Answer

it is used in the production of H+, e and O₂

Answer

it transfers energy during NADP production

Answer

it aids in the transport of ATP

Answer

it reacts with CO2 to form sugar

Question 40

Which pathway correctly describes the flow of electrons in photosynthesis?

Accepted Answer

H₂O------------NADPH ------------Calvin cycle

Answer

NADPH --------Chlorophyll----------CO₂

Answer

H₂O-------------CO₂--------------O₂

Answer

NADPH--------H₂O------------O₂

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