Which of the following statements is correct?
1. | The descending limb of loop of Henle is impermeable to water. |
2. | The ascending limb of loop of Henle is permeable to water. |
3. | The descending limb of loop of Henle is permeable to electrolytes. |
4. | The ascending limb of loop of Henle is impermeable to water. |
Alexander Von Humboldt described for the first time:
1. Laws of limiting factor
2. Species-Area relationships
3. Population Growth equations
4. Ecological Biodiversity
Zygotic meiosis is characteristic of?
1. Fucus
2. Funaria
3. Chlamydomonas
4. Marchantia
If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered?
1. 11
2. 33
3. 333
4. 1
Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by:
1. Bee
2. Wind
3. Bat
4. Water
Transplantation of tissues/organs fails often due to non-acceptance by the patient's body. Which type of immune-response is responsible for such rejections?
1. | Cell-mediated immune response |
2. | Hormonal immune response |
3. | Physiological immune response |
4. | Autoimmune response |
Life cycles of Ectocarpus and Fucus respectively are:
1. Diplontic, Haplodiplontic
2. Haplodiplontic, Diplontic
3. Haplodiplontic, Haplontic
4. Haplontic, Diplontic
A gene whose expression helps to identify transformed cell is known as:
1. | Vector | 2. | Plasmid |
3. | Structural gene | 4. | Selectable marker |
A dioecious flowering plant prevents both:
1. Autogamy and geitonogamy
2. Geitonogamy and xenogamy
3. Cleistogamy and xenogamy
4. Autogamy and xenogamy
Which statement is wrong for Krebs' cycle?
1. | There is one point in the cycle where FAD+ is reduced to FADH2 . |
2. | During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesized. |
3. | The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid. |
4. | There are three points in the cycle where NAD+ is reduced to NADH + H+. |