The experimental proof for semiconservative replication of DNA was first shown in a:
1. Fungus
2. Bacterium
3. Plant
4. Virus
Offsets are produced by:
1. | Meiotic divisions |
2. | Mitotic divisions |
3. | Parthenocarpy |
4. | Parthenogenesis |
Select the correct match:
1. Alec Jeffreys – Streptococcus pneumoniae
2. Alfred Hershey and Martha Chase – TMV
3. Matthew Meselson and F. Stahl – Pisum sativum
4. Francois Jacob and Jacques Monod – Lac operon
Which of the following has proved helpful in preserving pollens as fossils?
1. | Pollen kit | 2. | Cellulosic intine |
3. | Oil content | 4. | Sporopollenin |
1. Temperature
2. Light
3. O2 concentration
4. CO2 concentration
1. | Pachytene | 2. | Diplotene |
3. | Diakinesis | 4. | Zygotene |
The two functional groups characteristic of sugars are:
1. | Hydroxyl and methyl | 2. | Carbonyl and methyl |
3. | Carbonyl and phosphate | 4. | Carbonyl and hydroxyl |