This is the Multiples Choice Questions Part 4 of Science. In preparation for the LET Exam, practice, and familiarize every question we have, it might be included in the actual examination. Good luck.
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SCIENCE Part 4
1. This is the lower plant portion, usually a healthy root system and some portion of the stem used in grafting.
a. stamen
b. pistil
c. roostock
d. trunk
answer: c
2. In grafting, this is the portion above the graft, a young shoot or bud from a plant with beneficial characteristics like great flavor, color or disease resistance.
a. scion
b. rootstock
c. stamen
d. twig
answer: a
3. The relation which states that at the same temperature and pressure, equal volumes of all gases contain the same number of molecules.
a. Avogadro’s Law
b. Kepler’s Third Law
c. Sir Isaac Newton’s Law of Universal Gravitation
d. The Law of Harmonies
answer: a
4. The process by which green plants and some other organisms use sunlight to synthesize food from carbon dioxide and water.
a. Osmosis
b. Photosynthesis
c. Transpiration
d. Photolysis
answer: b
5. Why are plant call autotrophs?
a. Because they can use energy form light to synthesize or make their own food source.
b. Because they can be eaten as food by other organisms to carry out functions necessary for their life.
c. Because carnivorous organism rely on them for their nutrients.
d. Because most ecosystem are supported by the autotrophic primary production of plants that capture photons initially released by the sun.
answer: a
6. To perform photosynthesis, plants need the following, except:
a. water
b. carbon dioxide
c. sunlight
d. soil
answer: d
7. ___________ is the green coloration in leaves of plants.
a. carotenoid
b. chlorophyll
c. choline
d. chondroitin
answer: b
8. It is a bright red carotene and carotenoid and phytochemical found in tomatoes and other red fruits and vegetables, such as red carrots, watermelons and papayas.
a. hemoglobin
b. collagen
c. lycopene
d. chlorine
answer: c
9. Foods that are not red may also contains lycopene.
a. true
b. false
c. possibly
d. definitely not
answer: a
10. The atomic number of gold is 79. What is its chemical symbol?
a. G
b. Au
c. Fe
d. Ag
answer: b
11. A meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky.
a. prism
b. kaleidoscope
c. rainbow
d. aura
answer: c
12. The following are the colors found in the rainbow, except:
a. red
b. pink
c. indigo
d. yellow
answer: b
13. These are swollen underground stems that store food for the plant during dormancy, except:
a. legumes
b. bulbs
c. rhizomes
d. corms
answer: a
14. These are another type of swollen stem having no basil plate and the outside tends to be leathery. They have eyes or growth nodes from which the new plants grow.
a. corms
b. bulb
c. rhizomes
d. tubers
answer: d
15. When a liquid is heated, it eventually reaches a temperature at which the vapor pressure is large enough that bubbles from inside the body of the liquid. What do you call this temperature?
a. freezing point
b. melting point
c. boiling point
d. maximum temperature
answer: c
16. The normal boiling point of water is 100°C, but at an elevation of 10,000 feet, at what temperature does water start to boil?
a. 85°C
b. 110°C
c. 95°C
d. 90°C
answer: d
17. Is is an excellent solvent that can dissolve compounds, such as NaCI, that are insoluble or only slightly soluble in other liquids.
a. water
b. alcohol
c. wine
d. beer
answer: a
18. Mots solid expand when they melt, what happens to the water when it freezes?
a. expands
b. melts
c. boils
d. crystallizes
answer: a
19. It is a special type of mixture made by combining two liquids that normally do not mix.
a. solution
b. suspension
c. emulsion
d. mixture
answer: c
20. The following are examples of emulsions, except:
a. butter
b. mayonnaise
c. egg yolk
d. coffee
answer: d
