The essential chemical components of many coenzymes are:
| 1. | Nucleic acid | 2. | Carbohydrates |
| 3. | Vitamins | 4. | Proteins |
Which of the following statements is not true of two genes that show 50% recombination frequency?
| 1. | The genes are tightly linked. |
| 2. | The genes show independent assortment. |
| 3. | If the genes are present on the same chromosome, they undergo more than one crossing-over in every meiosis. |
| 4. | The genes may be on different chromosomes. |
Read the following statements (A-E) and answer the question which follows them.
| A: | In liverworts, mosses, and ferns gametophytes are free-living |
| B: | Gymnosperms and some ferns are heterosporous |
| C: | Sexual reproduction in Fucus, Volvox and Albugo is oogamous |
| D: | The sporophyte in liverworts is more elaborate than that in mosses |
| E: | Both, Pinus and Marchantia are dioecious |
How many of the above statements are correct?
1. Two
2. Three
3. Four
4. One
The incorrect statement with regard to Haemophilia is:
| 1. | It is a recessive disease |
| 2. | It is a dominant disease |
| 3. | A single protein involved in the clotting of blood is affected |
| 4. | it is a sex-linked disease. |
Advantage of cleistogamy is:
1. More vigorous offspring
2. No dependence of pollinator
3. Vivipary
4. Higher genetic variability
Transition state structure of the substrate formed during an enzymatic reaction is:
| 1. | permanent but unstable |
| 2. | transient and unstable |
| 3. | permanent and stable |
| 4. | transient but stable |
In china rose the flowers are:
1. Actiniomorphic, epigynous with valvel aestivation
2. Zygomorphic, hypogynous with imbricate aestivation
3. Zygomorphic, epigynous with twisted aestivation
4. Actinomorphic, hypogynous with twisted aestivation
Age of a tree can be estimated by:
1. biomass
2. number of annual rings
3. diameter of its heartwood
4. its height and girth
Which of the following are likely to be present in deep sea water?
1. Eubacteria
2. Blue-green algae
3. Saprophytic fungi
4. Archaebacteria
Variation in gene frequencies within populations can occur by chance rather than by natural selection.
This is referred to as:
1. Genetic drift
2. Random mating
3. Genetic load
4. Genetic flow
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