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Question-1
AIDS is due to:
(A)
Reduction in number of helper T - cells
(B)
Reduction in number of killer T - cells
(C)
Auto - immunity
(D)
Non - production of interferon's
Question-2
A good second line of defence is:
(A)
Hospital acquired infections
(B)
Washing of hands
(C)
Immunization
(D)
Infectious agents
Question-3
Which macro molecule is currently NOT being used as a vaccine in humans?
(A)
Capsular polysaccharides
(B)
Recombinant surface antigens
(C)
Inactivated exotoxins
(D)
DNA - based
Question-4
Which statement about gonorrhea is true?
(A)
The infection is not obvious or painful for men
(B)
The infection is usually obvious and painful for women
(C)
The earliest symptom is a flat, painless sore or blister.
(D)
In women, the infection can invade the cervix.
Question-5
The presence of high coliform counts in water indicate:
(A)
Contamination by human wastes
(B)
Phosphorous contamination
(C)
Decreased biological oxygen demand
(D)
Hydrocarbon contamination
Question-6
Nitrite prevents the growth of:
(A)
C. botulinum
(B)
C. perfringens
(C)
S. sureus
(D)
Yeasts
Question-7
A biological method of food preservation is:
(A)
Freezing
(B)
Drying
(C)
Fermentation
(D)
Adding salt
Question-8
With regard to the stages of syphilis:
(A)
The characteristic chancre of primary - stage syphilis will go away by itself even if left untreated .
(B)
Secondary - stage syphilis is characterized by a painful rash and severe itching.
(C)
Neurosyphilis may develop during latent syphilis.
(D)
Primary - stage syphilis often involves mental changes categorized as insanity.
Question-9
Each of the following statements concerning Candida albicans is correct except:
(A)
C. albicans is budding yeast that forms psuedohypae when it invades tissue
(B)
C. Albicans cause thrush
(C)
C. Albicans is transmitted primarily by respiratory aerosol
(D)
Impaired cell mediated immunity is an important predisposing factor to disease
Question-10
Salmonella bacteria are usually spread via :
(A)
Raw meats, poultry, and eggs
(B)
Pickled vegetables
(C)
Home - canned vegetables
(D)
Raw vegetables
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Cambridge Secondary Grade 9
IGCSE
Practice in Related Chapters
The Interdependence of Living Organisms
Feeding
Keeping Healthy
Transport in Plants
Classification
Cells and Tissues
Movement in and out of Cells
Personal Health
Animal Nutrition
Reproduction
Sensitivity
Cells the Building Blocks
Genetics
The Skeleton, Muscles and Movement
A Sexual Reproduction and Cloning Plants
The Senses
Survival
Co-ordination
Energy for Respiration
The Chemicals of Living Cells
How Substances Get In and Out of Cells
Plants for Food
Photosynthesis and Nutrition in Plants
Plant Structure and Function
Food and Diet
The Human Impact on the Environment
Digestion, Absorption and Use of Food
The Blood Circulatory System
Breathing
Excretion and the Kidneys
Human Reproduction
Classification
Conservation
Micro Organisms
Reproduction in Flowering Plants
Movement and Locomotion
Growth and Development
Disease: causes, transmission and control
Ecosystems
Population
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