"Ramachandran plot" is used to confirm the structure of
| 1. | RNA | 2. | Proteins |
| 3. | Triacylglycerides | 4. | DNA |
After meiosis I, the resultant daughter cells have
| 1. | same amount of DNA as in the parent cell in S |
| 2. | twice the amount of DNA in comparison to haploid gamete |
| 3. | same amount of DNA in comparison to haploid gamete |
| 4. | four times the amount of DNA in comparison to haploid gamete |
Crossing over takes place between which chromatids and in which stage of the cell cycle?
| 1. | Non-sister chromatids of non-homologous chromosomes at Zygotene stage of prophase I. |
| 2. | Non-sister chromatids of homologous chromosomes at Pachytene stage of prophase I. |
| 3. | Non-sister chromatids of homologous chromosomes at Zygotene stage of prophase I. |
| 4. | Non-sister chromatids of non-homologous chromosomes at Pachytene stage of prophase I. |
The main difference between active and passive transport across cell membrane is:
| 1. | passive transport is non-selective whereas active transport is selective. |
| 2. | passive transport requires a concentration gradient across a biological membrane whereas active transport requires energy to move solutes. |
| 3. | passive transport is confined to anionic carrier proteins whereas active transport is confined to cationic channel. |
| 4. | active transport occurs more rapidly than passive. |
Which of the following is not a feature of active transport of solutes in plants ?
1. Occurs against concentration gradient
2. Non-selective
3. Occurs through membranes
4. Requires ATP
What will be the direction of flow of water when a plant cell is placed in a hypotonic solution?
1. Water will flow in both directions.
2. Water will flow out of the cell.
3. Water will flow into the cell.
4. No flow of water will happen in any direction.
Which of the following bacteria reduces nitrate in soil into nitrogen?
1. Nitrobacter
2. Thiobacillus
3. Nitrococcus
4. Nitrosomonas
In Hatch and Slack pathway, the primary CO2 acceptor is -
| 1. | Oxaloacetic acid | 2. | Phosphoglyceric acid |
| 3. | Phosphoenol pyruvate | 4. | RuBisCO |
One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of :
| 1. | Violet and green light | 2. | Indigo and green light |
| 3. | Orange and yellow light | 4. | Blue and red light |
Where is the respiratory electron transport system (ETS) located in plants?
| 1. | Mitochondrial matrix |
| 2. | Outer mitochondrial membrane |
| 3. | Inner mitochondrial membrane |
| 4. | Intermembrane space |
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