NATURAL SCIENCE: BIOLOGY 35 Items
1. How do hormones work?
a. by releasing adrenaline
b. by controlling cell chemistry
c. by regulating water loss
d. by controlling blood pressure
Ans: b
2. Name the male and female sex hormones
a. sperm cell and ovum
b. testosterone
c. chromosomes
d. red and white blood cells
Ans: a
3. The unit of measurement of energy in a given amount food.
a. pound
b. kilo
c. olfactory system
d. calorie
Ans: b
4. Nitrogen compounds known as the building blocks of proteins
a. enzymes
b. glucose
c. nutrients
d. amino acids
Ans: d
5. The growth of root towards water is an example of?
a. chemotropism
b. geotropism
c. hydrotropism
d. photoprism
Ans: c
6. DNA means?
a. data nurturing analysis
b. deoxytribonucleic acid
c. deoxyribonucleic acid
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d. d. deotrixyl nucleic acid
Ans: c
7. What are the 3 products of oxygen when it has been burned?
a. water, carbon dioxide and air
b. energy, water and carbon
c. energy, carbon and oxide
d. energy, air and
water Ans: b
8. In flowering plants, fertilization takes place in the?
a. pollen tube
b. stamen
c. ovules
d. pollen grains
Ans: c
9. The development or egg without fertilization.
a. mitosis
b. parthenogenesis
c. spermatogenesis
d. mitochondria
Ans: b
10. Which of the following is a source of energy needed for photosynthesis?
a. water
b. soil
c. light
d. fertilizer
Ans: c
11. They connect roots and leaves and serve as passageway and storage for food minerals and
water from the soil.
a. branches
b. stem
c. trunk
d. tap
roots
Ans: b
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12. The process by which plants produce food using carbon dioxide and water, sunlight
and chlorophyll.
a. reproduction
b. photosynthesis
c. fruit bearing
d. chemosynthesi
s Ans: b
13. Process by w/c plants reproduce asexually by using their parts such as roots, stems and
leaves
a. mitosis
b. artificial propagation
c. vegetation reproduction
d. graftin
g Ans: c
14. The smallest part of living thing which performs all the processes a living organism does
a. organ
b. cell
c. tissue
d. syste
m Ans:
15. A group of tissues working together to perform a complex task.
a. system
b. organ
c. network
d. skin
Ans: b
16. Male and female reproductive parts of a flower.
a. pollen grains and ovules
b. stamen and pistil
c. pollen grain and pistil
d. stamen and
ovules Ans: b
17. In the human body, the cell that most nearly resembles a one – celled animal.
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a. red blood cell
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b. white blood cell
c. nerve cell
d. antibodies
Ans: b
18. The main energy source of plant – eating animal.
a. glucose
b. starch
c. celluse
d. glycoge
n Ans: c
19. These are cellular secretions which help regulate the breakdown and buildup of
various substances in the body.
a. enzymes
b. amino acids
c. plasma
d. hormone
s Ans: b
20. It is energy source of the cell which it uses for growing , reproducing and other activities.
a. adenosine triphosphate (ATP)
b. amino acids
c. Chloroplast
d. sunlight
Ans: a
21. It is a segment of DNA molecule which controls the appearance of a given trait.
a. chromosomes
b. genes
c. gametes
d. zygotes
Ans: b
22. Group of similar cell performing similar functions together.
a. organs
b. system
c. nucleus
d. tissue
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Ans: d
23. The diffusion of water through a semi – permeable membrane.
a. osmosis
b. permeability
c. transfusion
d. capillar
y Ans: a
24. It shows the complex food relationships of organism in a given area and the cyclic flow of
food through organisms.
a. food chain
b. food web
c. food pyramid
d. biological cycle
Ans: b
25. Which of the following does NOT occur to both respiration and fermentation?
a. energy is released
b. sugar is broken down
c. carbon dioxide is produced
d. alcoho
l Ans:
26. The genetic information in a DNA is coded in the _______________________?
a. sequence of ribonucleotides
b. proportion of the base results
c. base pairings
d. sequence of
nucleotides Ans: d
27. What will be the cause the process of respiration to stop?
a. absence of oxygen
b. absence of sunlight
c. decrease in water supply
d. presence of
sunlight Ans: a
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28. What relationship exist between and a bangus and tilapia in the fishpond?
a. commensalisms
b. mutualism
c. competition
d. predatio
n Ans: c
29. Taxonomy is the study of the classification of organism based on their?
a. genetics
b. evolutionary history
c. development pattern
d. habita
t Ans:
30. A specie is said to be ________ when its number is so few that it will most likely disappear
altogether unless given proper protection.
a. disappearing
b. extinct
c. depleted
d. endangere
d Ans: d
31. Some bacteria are classified as saprophytes because because they organism which?
a. feed on dead organic matter
b. feed on other living things
c. undergo photosynthesis
d. have hydrolytic
enzymes Ans: a
32. In humans, food is moved down the esophagus into the stomach by means of?
a. cyclosis
b. peptic acids
c. peristalsis
d. active transport
Ans: c
33. The structure outside the nucleus in animal cells that is involved in mitosis.
a. ribosome
b. chromosome
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c. centriole
d. microtubule
Ans: c
34. Coordination and integration of the body activities of man are under the direct control of the
_______________?
a. reproduction and transport system
b. nervous and endocrine system
c. nervous and excretory system
d. respiratory and endocrine
system Ans: b
35. Genetic engineering has been utilized for the production of _______________?
a. genes
b. salivary amylase
c. uric acid crystals
d. human growth
hormones Ans: d
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