Your quiz

Term 2 / Quiz 01


In the space provided Write the letter of the description that best matches the term or phrase:


1. Substrate a. all chemical reactions in an organism.

2. Electron microscope b. making an image look larger than its actual size.

3. metabolism c. uses beam of electrons to form an image of a specimen.

4. TEM d. ability to move or change matter.

5. activation energy e. light passes through one or more lenses to prduce a
magnified image of a specimen

6. magnification f. a measure of an image's clarity.

7. energy g. substance that an enzyme acts on.

8. resolution h. micrograph revealing cell's internal structure in fine details.

9. products i. pushing a boulder.

10. Light microscope j. newly formed substances.




In the space provided, write the letter of the term or phrase that best completes each statement or best answers the question:

1- Which scientist used a microscope to view the cells ?
a. Van Leeuwenhoek c. Schleiden
b. Hooke d. Virchow.

2- enzymes in your body probably work best at ………. Degrees celcius
a. 25. c. 30.
b. 37 d. 98

3- A millimeter is equivalent to
a. Half the diameter of a penny. c. more than a yard.
b. The width of a pencil tip. d. the length of a water molecule
.
4- The enzyme that breaks down hydrogen peroxide
a. amylase. c. catalase.
b. Carbonic anhydrase. d. hydrogenase.


5- Which of the following produces a highly magnkified 3D image of a cell?
a. Hand lens . c. light microscope.
b. Scanning tunneling microscope. d. electron microscope.

6- Enzyme activity is affected by
a. temperature. c. factors affecting the shape of the enzyme.
b. pH. d. all of the above

7. living specimens can be viewed using
a. Light microscope c. scanning tunneling microscope.
b. Electron microscope. d. Both (a) and (b).

8. A catalyst
A. Provides extra energy for a reaction.
B. lowers the activation energy.
C. Eliminates the activation energy of a reaction.
D. only allows irreversible reactions.

9. Without enzymes, the chemical reactions in your body would
a. Happens too fast. c. occur at much the same rate as they do now .
b. Read scientific reports. d. occur too slow .

10. The reversible reaction is the reaction that …….
a. Has no reactants
b. Has no products
c. Can proceed in both directions
d. None of the above

Thank you