مدارس الرياض للبنين و البنات
Riyadh Schools for Boys & Girls
متوسط و ثانوي دولي بنات
High School International Girls ١٤٣٩ـ١٤٣٨
2017/ 2018 الفصل الدراسي األول
First Semester
Science Department
Biology Tahsili
W. Sheet 2
1. Cleaning the environment from the pollutants that affect the ecosystem, using living
organisms is called:
A. bacterial treatment
B. biological
C. climate
D. physiology
2. Bacteria in nature are able to fix
A. nitrogen
B. oxygen
C. CO2
D. H2
note: nitrogen lives on the roots of legumes, so it fixes or takes the nitrogen that is not usable, so
it’s a mutualistic relationship, benefitting both the bacteria and the plant as nitrogen in its
atmospheric form is not usable by the plants, and only by fixing it using the bacteria, converting
it into nitrate/nitrite will benefit the plant.
3. Which viral life cycle produces a lot of copies of DNA, and RNA of the virus
A. lytic
B. lysogenic
C. translation
D. none of the above
4. A protein that can cause an infection or disease in living organisms
A. Prion (protist)
B. virus (Genetic strip that PROTEIN encapsulates)
C. bacteria (Unicellular Prokaryotic organism)
D. bacteriophage (the virus that affects bacteria ONLY)
5. Penicillin is extracted from
A. mushrooms
B. Penicillium
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6. Which of the following is not a function of the Capsule
A. Prevents dehydration
B. sticks to surfaces
C. movement
D. protection from the external environment
7. Latent (not growing atm, hibernation because of inconvenient conditions.) bacterial cell that
is able to survive in harsh circumstances for a long time
A. Basidiospore
B. External spore
C. Internal spore
D. Zoospores
8. A viral disease that affects the nervous system
A. Botulism
B. Tetanus
C. Cholera
D. viral meningitis
note: All of them are produced by bacteria except for d
9. Temporary convergence between two organisms to exchange chromosomes
A. separation
B. fusion
C. regeneration
D. pairing
10. When the environmental conditions become harder, certain types of bacteria will produce
A. endospore
B. exospore
C. internal skeleton
D. exoskeleton
11. A bacterium that causes disease for humans
A. acidophiles
B. thermophiles
C. E.coli
D. hydrophiles
12. One of the following is found in retroviruses (viruses that contain RNA as their genetic
material)
A. using RNA to produce DNA
B. using DNA to produce RNA
C. producing protein directly from DNA
D. producing proteins directly from RNA
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13. HIV is a:
A. adenoviruses
B. retroviruses
C. lytic viruses
D. direct viruses
14. Archaebacterial cells lack
A. plasmid
B. chromosome
C. ribosomes
D. nuclear envelope
15. According to locomotion, bacteria:
A. all can move
B. all can’t move
C. all can swim
D. some can move and some can’t
16. Which of the following causes cholera for humans:
A. prions
B. viruses
C. bacteria
D. parasites
17. Microscopic prokaryotic organisms:
A. plants
B. bacteria
C. fungi
D. animals
18. A nonliving strand of genetic material within a protein coat is:
A. bacteria
B. virus
C. fungi
D. protists
19. Bacterial cell walls contain
A. peptidoglycan
B. cellulose
C. chitin
D. lignin
20. Which of the following protects bacterial cells from dehydration?
A. Flagella
B. cilia
C. chromosomes
D. capsule
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21. Which of the following is used in yogurt and pickles manufacturing?
A. viruses
B. bacteria
C. algae
D. fungi
22. The cycle in which the viral DNA integrates into a chromosome in a host cell:
A. lytic cycle
B. cell cycle
C. lysogenic cycle
D. model cycle
23. An example of a virus that enters the lysogenic cycle
A. Genital herpes
B. common cold
C. flu
D. Tuberculosis
24. An example of a retrovirus is
A. Adenovirus
B. Influenzas
C. AIDS
D. Tobacco
25. The bacteria that don’t use oxygen for growth or metabolism is called
A. Aerobic
B. Anaerobic
C. Lytic
D. Autotrophic
26. Nutrients are recycled and nitrogen is fixated by
A. Viruses
B. Bacteria
C. Prions
D. Fungi
27. Vitamin K is produced in the human intestines with the help of
A. E.coli
B. Bacteriophage(eater)
C. Streptococcus
D. Cyanobacteria
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28. Bacteria exchange their genetic material through a process called
A. Conjugation
B. Sporulation
C. Budding
D. Capsulation
29. A virus adheres to a host cell through
A. Cilia
B. Receptors
C. Cytoplasm
D. Flagella
30. Viruses are classified according to
A. Genetic material
B. Protein capsule
C. cell wall
D. cell/ plasma membrane
31. The relationship between nitrogen-fixating bacteria and the roots of legumes
A. Mutualistic
B. Predation
C. Parasitism
D. Decomposing
32. AIDS is a sexually transmitted disease that affects humans and is caused by
A. Viruses
B. Bacteria
C. Prions
D. Fungi
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Answer Sheet:
1. a
2. a
3. b
4. a
5. b
6. c
7. c
8. d
9. d
10. a
11. c
12. a
13. c
14. d
15. d
16. c
17. b
18. b
19. a
20. d
21. b
22. c
23. a
24. c
25. b
26. b
27. a
28. a
29. b
30. a
31. a
32. a
