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Sumeya Secondary and Preparatory School Exercise book after

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2016 2nd Semester Biology Mid Exam for Grade 11
Teacher -
Name ________________________________Section ________No ______ April Khedir
2024

I. Write “True” if the statement is correct otherwise, “False” if it is incorrect on the answer
sheet provided.
1. Cholera is a bacterial disease that affects the intestinal tract.
2. Antibiotics are chemicals that destroy fungi but do not harm human cells.
3. All viruses are parasites.
4. Dead or active strains of germs are put into your body during vaccination.
5. There is no cure or vaccine for all types STDs.
6. It is not important to care for and support people who are living with HIV/AIDS.
7. Tuberculosis is a bacterial disease usually affecting the lungs, transmitted through the air.
8. Malaria is a mosquito-borne disease caused by female Anopheles mosquito.
9. Changes that alter the sequence of one or a few DNA nucleotides are called point mutations.
10. Gram-positive bacteria have an outer membrane that stains purple.
11. Viruses are more closely related to chemical matter than to a living organism.
12. The HIV virus uses the host cell's reverse transcriptase to manufacture DNA.
13. HIV binds to the human white blood cell receptor protein CD4.
14. HIV is a DNA virus.
15. Viruses and bacteria are the only infectious agents found in plants and animals. Because the
peptidoglycans wall of gram-positive bacteria is covered by an outer (lipopolysaccharide)
membrane, they are more resistant to the action of most antibiotics than gram-negative
bacteria.
16. If an organism is capable of photosynthesis, it belongs to the plant kingdom.
17. Fungi generally carry out external digestion.
18. All yeasts are single-celled organisms derived from the phylum Zygomycota.
19. Hyphae are made up of a long string of cells, separated by septa, that prevents the mixing of
cytoplasm between cells.
20. Axons are much longer than dendrites.
21. The neuron enters the spinal cord through the dorsal root.
22. The spinal cord carries information from all over the body to and from the brain.
23. A nerve cell or neuron consists of a cell body, dendrites and an axon.
24. Cranial nerves come from the brain, while spinal nerves are from the spinal cord.
25. Alcohol, tobacco, khat and cannabis are the most widely used substances in Ethiopia.
26. The musculoskeletal system produces blood cells in the bone marrow.
27. Gene therapy can be used to treat a wide range of diseases.
28. The Rh factor inheritance is dependent of the ABO blood types.
 29.
II. Match the Terms under column “A” with the best descriptions under column “B” and
write your answers on the answer sheet provided.

Column A
1. spinal cord
2. neurons Column B
3. sensory receptors A. tree-like branches from nerve cell bodies
4. affector (afferent) B. fatty insulating sheath
5. effector (efferent) C. neural path of a reflex
6. myelin sheath D. neurons which are activated by other neurons
7. dendrites E. the large frontal area of the human brain
8. fore brain F. sends impulses from brain/ spinal cord to
9. relay neurons organs
10. reflex arc G. sends impulses from organs to spinal
cord/brain
H. nerve endings that can sense stimuli
I. nerve cells
J. column of neurons within the backbone
K. action potential

III. Choose the best answer from the given alternatives and write your answers on the answer
sheet only.
1. Diseases can be transmitted by:
A. Unprotected Sexual contact C. Vectors of pathogens
B. Contaminated water & food D. All are correct answers
2. The causative agent of the disease known as acquired immune deficiency syndrome belongs
to the group of:
A. Fungi B. Worms C. Virus D. Bacteria
3. The tapeworm lives in the intestine of man as:_______________
A. Saprophyte B. Parasite C. Symbiont D. Independent organism
4. All of the following are sexually transmitted disease except_______
A. Cholera B. Gonorrhoea C. Syphilis D. Chancroid
5. All Fungi are ______
A. Parasitic B. Photosynthetic C. Saprophytic D. Heterotrophic
6. Which of the following characteristics is common to both bacteria and viruses?
A. contain genetic material C. have a cell membrane
B. can be killed using antibiotics D. have a protein coat
7. The chemical approach applied to living tissue to controlling micro-organisms are:
A. Antiseptics B. Disinfectant C. Autoclaving D. Sterilization
8. The organisms formed as a result of a symbiotic association between the algae and fungi are
A. Lichens B. Ferns C. Mosses D. Mycorrhiza
9. Syphilis is a bacterial STD caused by _________
 A. Neisseria gonorrhoeae C. Haemophilus ducreyi
B. Treponema pallidum D. Vibirio cholerae
10. Another name of cyanobacteria
A. Blue-green algae C. Protists
B. Golden algae D. Slime molds
11. Choose the alternative that contains the disease caused by what is known as droplet
infection?
A. Typhoid fever B. Cholera C. Malaria D. Tuberculosis
12. What is the mode of transmission of diseases such as gastroenteritis & cholera?
A. Blood to blood contact C. Eating contaminated food
B. Bites of animal vectors D. Sexual contact
13. Paramecium is
A. Bacteria B. Protozoa C. Virus D. Annelid
14. Which is not a bacterial disease?
A. Cholera B. Gonorrhea C. Typhoid D. AIDS
15. Athlete’s foot is caused by a parasitic ________
A. Bacteria B. Virus C. Fungus D. Protozoa
16. The most effective ways to prevent the spread of gonnorrhoea involve
A. Be faithful to your sexual partner C. visit a local clinic for check up
B. Use a male or female condom D. all are preventive methods
17. Which of the following method is used prevent the disease caused by tapeworm?
A. Taking effective medicines
B. Avoid working in overcrowded conditions
C. Avoid eating improperly cooked or raw meat
D. Use insecticide-treated mosquito nets
18. One of the following STD is commonly seen in men than women
A. Chlamydia B. Chancroid C. HBV D. Typhoid
19. All of the following are parts of a nerve cells except which one
A. brain B. dendrites C. cell body D. axon
20. What is the function of ligaments in the musculoskeletal system?
A. Connect bones to muscles C. Connect bones to bones
B. Connect muscles to muscles D. Connect muscles to tendons
21. Which component of the musculoskeletal system prevents bones from rubbing against each
other?
A. Ligaments C. Cartilages
B. Tendons D. Joints
22. Which type of gene therapy is passed onto the patient's children and subsequent generations?
A. Somatic gene therapy C. Viral vector gene therapy
B. Germ line gene therapy D. Bacterial vector gene therapy
23. Selective breeding involves:
A. Choosing parents with particular characteristics to breed together
 B. Modifying an organism's DNA to improve desired traits
C. Applying natural selection to breed animals and plants
D. Introducing foreign genes into an organism's genome
24. Genetic testing is used to:
A. Determine the risk of passing on genetic disorders to children
B. Treat genetic disorders
C. Identify the type of genetic disorder
D. All of the above
25. Genetic counseling helps individuals:
A. Identify and interpret the risks of inherited disorders
B. Make informed decisions about genetic testing
C. Understand inheritance patterns
D. All of the above
26. Down syndrome is caused by:
A. A deletion of a part of chromosome
B. An extra copy of chromosome 21
C. A translocation of chromosomal segments
D. Changes in multiple genes and environmental factors
27. Which of the following is an example of an autosomal dominant disorder?
A. Cystic fibrosis C. Down syndrome
B. Hemophilia D. Huntington's disease
28. In an autosomal recessive disorder, the affected individual:
A. Inherits the defective gene from one parent
B. Inherits the defective gene from both parents
C. Carries the trait but is unaffected
D. Has a higher risk of passing on the disorder to their children
29. Pedigree analysis is used to:
A. Study the inheritance of traits in plants and animals
B. Determine the characteristics of an individual based on their genealogy
C. Identify the risk of disease inheritance in human families
D. Cross human beings to study genetic disorders
30. Which of the following genotypes represents a person with Rh negative blood?
A. Rh+/Rh+ B. Rh+/Rh- C. Rh-/Rh- D. Rh-/Rh+
31. Rh sensitization occurs in the mother when:
A. The mother has Rh negative blood C. The baby has Rh positive blood
B. The father has Rh negative blood D. The baby has Rh negative blood
32. Which of the following genetic diseases is an example of a sex-linked trait?
A. Hemophilia C. Asthma
B. Diabetes D. Hypertension
33. How can environmental conditions affect the phenotype of organisms?
A. By changing their genotype C. By inducing phenocopies
B. By altering their DNA structure D. By suppressing gene expression
34. Which of the following statement correctly describes mylein sheath
A. an electrically insulating material (made of lipid) that forms around the axon of a neuron.
B. increases the speed at which an action potential moves down the axon.
C. it is created by glial cells
D. All are correct
35. Most reflex actions can be summarized as :
A. stimulus → receptor → afferent neuron → co-ordinator → effector → response
B. stimulus → receptor → afferent neuron → co-ordinator → effector → response
C. stimulus → receptor → afferent neuron → co-ordinator → effector → response
D. stimulus → receptor → afferent neuron → co-ordinator → effector → response
36. consuming excessive amounts of alcohol in a short period of time is called
A. Binge drinking C. Hallucinogens
B. Alcoholics D. Cirrhosis
37. Which of the following are characteristics of bacterial cells?
A. Bacterial cells are prokaryotes.
B. Bacterial cells do not have an organized nucleus.
C. Bacterial cells have a cell wall.
D. Bacterial cells have a ring of double-stranded of DNA.
E. All of the above are true.
38. When exposed to harsh conditions, some bacteria form:
A. capsules C. pili E. a cell wall
B. endospores D. flagella
39. Bacteria are responsible for:
A. cycling minerals within the ecosystem
B. introducing oxygen into the atmosphere
C. deadly diseases
D. all of the above
40. Chromosomal rearrangement may result in
A. monoploidy B. aneuploidy C. diploidy D. statiploidy
41. Inversions in a chromosome
A. are a form of transposition D. have an effect on recombination
B. cause aneuploidy E. alter gene expression
C. are important in eukaryotes if in somatic
cells
42. Which of the following is not a viral disease?
A. mumps C. chicken pox
B. measles D. diphtheria
43. In AIDS patients, the virus homes in on the _______________ T cells.
A. CD1+ B. CD2+ C. CD3+ D. CD4+ E. CD5+
44. The basic structure of a virus contains:
A. a nucleic acid C. a protein coat E. both A and C
B. a cell wall D. both A and B
45. Rod shaped bacteria are called
A. bacilli B. streptococci C. cocci
D. staphylobacilli E. spirilla
46. Which of the following are characteristics of bacterial cells?
A. Bacterial cells are prokaryotes.
B. Bacterial cells do not have an organized nucleus.
C. Bacterial cells have a cell wall.
D. Bacterial cells have a ring of double-stranded of DNA.
E. All of the above are true.
47. All of the following diseases are caused by bacteria except:
A. typhus B. yellow fever C. cholera D. tuberculosis
48. Organisms that move by means of pseudopodia belong to the group:
A. algae B. sarcodina C. bacteria D. euglenoids
49. Basidiospores are borne on the ends of
A. primary mycelia C. trichogynes E. secondary mycelia
B. basidiocarps D. sterigmata
50. Most yeast reproduction occurs by
A. budding C. syngamy E. basidiospores
B. conidia D. ascospores
51. The fungal components of lichens are mostly
A. basidiomycetes C. ascomycetes E. mycorrhizae
B. Fungi Imperfecti D. zygomycetes
52. Cell walls of fungi are composed primarily of
A. lignin C. chitin E. glycoprotein
B. cellulose D. ectin
53. Which of the following is a reproductive structure of a fungus?
A. gametangia C. conidia E. none of the above
B. sporangia D. all of the above
54. Which one of the following groups of fungi has not been observed to reproduce sexually?
A. Ascomycota C. Basidiomycota E. both A and C
B. Imperfect fungi D. Zygomycota
55. Among the following which one is not describe bacteria?
A. Prokaryotic C. Multicellular
B. Unicellular D. Possess cell wall
56. Which of the following term refers to bacterial cell with comma shape?
A. Bacillus B. Coccus C. Spirillum D. Vibrio
57. Suppose unknown bacteria have a distinctive red or purple appearance when observed under
microscope following gram staining. This bacteria is
A. Gram-negative C. Acid-fast
B. Gram-positive D. All of the above
58. All of the following describing the characteristics of fungi except one
A. All are heterotrophic C. All are unicellular
B. All are eukaryotic D. All yeasts are unicellular fungi
 59. Which part of the following is considered as an internal structure of bacteria?
A. Chromosome C. Cell wall
B. Nucleus D. Flagella
60. _____________ is an active immunity that is artificially acquired
A. Antibiotic B. Vaccine C. Antiseptic D. Disinfectant
61. Which of the following marriage is not good for the offspring?
A. Rh- women and Rh + man C. B. Rh- woman Rh- man
B. Rh+ women Rh- man D. Rh+ women Rh+ man
62.
IV. Fill in the blank spaces: write the appropriate words or phrases that fill the blank spaces
on the answer sheet provided.
63. Infectious diseases are caused by ____________________.
64. _____________________ is a mosquito-borne disease caused by Plasmodium parasites
65. mental illness general term referring to psychological, emotional, or behavioural disorders
66. Reflex actions automatic, instinctive, unlearned reactions to stimuli
67. __________________ is when both alleles are expressed equally rather than a dominant
allele taking complete control over a recessive allele.
68. A trait influenced by genes located on the sex chromosomes is ______________
69. An environmentally induced phenotype of an individual is called ___________
70. ________________ is a disease that is caused by a change or mutation in the body cells of an
individual’s DNA that passes on from parents to their children.
71. _________________ examines the presence of disorders on genetic materials and tells an
individual about the likelihood and risk of passing genetic disorders on to their children.
72. _______________________ involves checking the medical history and records of a family to
order to conduct genetic tests
73. ____________________ is the technique of the introduction of genes into the existing cells
to modify a person’s genes to prevent or cure a wide range of diseases through somatic gene
therapy or Germ-line gene therapy
74. A scientific practice of sexual reproduction and the application of genetic principles that
involve male and female to produce offspring in animals or plants is __________
75. synapse the junction between two neurons (axon-to-dendrite) or between a neuron and a
muscle
76. neurotransmitters chemicals that transmit nerve impulses across synapses
77. A genetic disorder caused by a change in a single gene is known as a ________
78.
V. Give short answers for the following terms (Bonus: 1pt each)
79.
80.
81.
 ANSWER SHEET - GRADE 11 BIOLOGY

Name ________________________________Section ________No ______

I. True or false questions

1 2 3 4 5 6 7 8 9 10

II. Multiple-choice questions

1 6 11 16 21
2 7 12 17 22
3 8 13 18 23
4 9 14 19 24
5 10 15 20 25

III.Matching questions
1 2 3 4 5 6 7 8 9

IV. Fill in the blank spaces

1 4
2
3 5
6

V. Give short answers

1. ________________________________________
2. ________________________________________
3. __________________ and __________________