DNA fragments are:
1. Negatively charged
2. Neutral
3. Either positively charged depending on their size
4. Positively charged
Which of the following components provides sticky character to the bacterial cell?
1. Nuclear membrane
2. Plasma membrane
3. Glycocalyx
4. Cell Wall
Which of the following options best represents the enzyme composition of pancreatic juice?
1. Amylase, pepsin, trypsinogen, maltase
2. Peptidase, amylase, pepsin, rennin
3. Lipase, amylase, trypsinogen, pro carboxypeptidase
4. Amylase, peptidase, trypsinogen, rennin
Which among these is the correct combination of aquatic mammals?
1. Dolphin, Seals, Trygon
2. Whales, Dolphin, Seals
3. Trygon, Whales, Seals
4. Seals, Dolphin, Sharks
Fruit and leaf drop at early stages can be prevented by the application of:
1. Ethylene
2. Auxins
3. Gibberellic acid
4. Cytokinins
Select the correct route for the passage of sperms in male frogs:
1. | Testes → Vasa efferentia → Kidney → Seminal Vesicle → Urinogenital duct → Cloaca |
2. | Testes → Vasa efferentia → Bidder's canal → Uretar → Cloaca |
3. | Testes → Vasa efferentia → Kidney → Bidder's canal → Urinogenital duct → Cloaca |
4. | Testes → Bidder's canal→ Kidney→ Vasa efferentia → Urinogenital duct→ Cloaca |
In case of a couple where the male is having a very low sperm count, which technique will be suitable for fertilization?
1. | Gamete intracytoplasmic fallopian transfer |
2. | Artificial insemination |
3. | Intracytoplasmic sperm injection |
4. | Intrauterine transfer |
Which ecosystem has the maximum biomass?
1. Grassland ecosystem
2. Pond ecosystem
3. Lake ecosystem
4. Forest ecosystem
Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of:
1. Inspiratory Reserve Volume
2. Tidal Volume
3. Expiratory Reserve Volume
4. Residual Volume
Presence of plants arranged into well-defined vertical layers depending on their height can be seen best in:
1. Tropical Rain Forest
2. Grassland
3. Temperate Forest
4. Tropical Savannah