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+. |
Phosphoenol pyruvate (PEP) is the primary CO2 acceptor in:
1. C4 plants
2. C2 plants
3. C3 and C4 plants
4. C3 plants
During DNA replication, Okazaki fragments are used to elongate:
1. | The lagging strand towards the replication fork. |
2. | The leading strand away from the replication fork. |
3. | The lagging strand away from the replication fork. |
4. | The leading strand towards the replication fork. |
Which of the following RNA should be most abundant in an animal cell?
1. | t-RNA |
2. | m-RNA |
3. | mi-RNA |
4. | r-RNA |
GnRH, a hypothalamic hormone, needed in reproduction, acts on:
1. | Anterior pituitary gland and stimulates secretion of LH and FSH. |
2. | Posterior pituitary gland and stimulates secretion of oxytocin and FSH. |
3. | Posterior pituitary gland and stimulates secretion of LH and relaxin. |
4. | Anterior pituitary gland and stimulates secretion of LH and oxytocin. |
What is the criterion for the movement of DNA fragments on agarose gel during gel electrophoresis?
1. | The smaller the fragment size, the farther it moves |
2. | Positively charged fragments move to farther end |
3. | Negatively charged fragments do not move |
4. | The larger the fragment size, the farther it moves |
Hypersecretion of Growth Hormone in adults does not cause further increase in height, because?
1. | Epiphyseal plates close after adolescence. |
2. | Bones lose their sensitivity to Growth Hormone in adults. |
3. | Muscle fibres do not grow in size after birth. |
4. | Growth Hormones become inactive in adults. |
DNA replication in bacteria occurs:
1. Within nucleolus
2. Prior to fission
3. Just before transcription
4. During S phase