Male gametophyte with least number of cells is present in:
1. Pteris
2. Funaria
3. Lilium
4. Pinus
An aggregate fruit is one which develops from:
1. Multicarpellary syncarpous gynoecium
2. Multicarpellary apocarpous gynoecium
3. Complete inflorescence
4. Multicarpellary superior ovary
Pollen tablets are available in the market for:
| 1. | In vitro fertilization | 2. | Breeding programmes |
| 3. | Supplementing food | 4. | Ex-situ conservation |
Function of filiform apparatus is to:
| 1. | Recognize the suitable pollen at the stigma |
| 2. | Stimulate division of generative cell |
| 3. | Producer nectar |
| 4. | Guide the entry of the pollen tube |
Which of the following shows coiled RNA strand and capsomeres?
| 1. | Poliovirus | 2. | Tobacco mosaic virus |
| 3. | Measles virus | 4. | Retrovirus |
Which one of the following is wrongly matched?
| 1. | Transcription- Writing information from DNA to t-RNA |
| 2. | Translation- Using the information in m-RNA to make protein |
| 3. | Repressor protein- Binds to an operator to stop enzyme synthesis |
| 4. | Operon- Structural genes, operator, and promoter |
Transformation was discovered by:
1. Meseson and Stahl
2. Hershey and Chase
3. Griffith
4. Waston and crick
Fruit colour in squash is an example of:
1. Recessive epistasis
2. Dominant epistasis
3. Complementary genes
4. Inhibitory genes
Viruses have:
1. DNA enclosed in a protein coat
2. Prokaryotic nucleus
3. Single chromosome
4. Both DNA and RNA
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