Diatomaceous earth is used as a heat insulator in boilers and steam pipes because the cell wall of diatom is
1. Composed of iron
2. Composed of silicon dioxide
3. a good conductor of heat
4. a bad conductor of electricity
Enzymes are not found in:
1. Fungi
2. Algae
3. Virus
4. Cyanobacteria
Virus are living, because:
1. They multiply in host cells
2. Carry anaerobic respiration
3. Carry metabolic activity
4. Cause infection
Which disease of man is similar to cattle's, bovine spongiform encephalopathy:
1. | Encephalitis | 2. | Jacob-Creutzfeldt disease |
3. | Spongiocitis of cerebrum | 4. | Spondylitis |
Organisms that obtain energy by the oxidation of reduced inorganic compounds are called:
1. Photo autotrophs
2. Chemo autotrophs
3. Saprozoic
4. Coproheterotrophs
In five kingdom system, the main basis of classification:
1. Structure of the nucleus
2. Nutrition
3. Structure of cell wall
4. Asexual reproduction
Black rust of wheat is caused by:
1. Puccinia
2. Ustilago
3. Albugo
4. Phytophthora
Stored food in fungi:
1. Starch
2. Proteins
3. Glycogen
4. Chitin
Viruses are no more "alive" than isolated chromosomes because:
1. | They require both RNA and DNA |
2. | They both need food molecules |
3. | They both require oxygen for respiration |
4. | Both require the environment of a cell to replicate |
In which kingdom would you classify the archaea and nitrogen-fixing organism, if the five-kingdom system of classification is used?
1. | Plantae | 2. | Fungi |
3. | Protista | 4. | Monera |