Biology questions
20584 published questions with worked solutions.
- In a chloroplast the highest number of protons are found in:
- Spindle fibres attach on to:
- Which of the following is required as inducer(s) for the expression of Lac operon?
- Which of the following pairs of hormones are not antagonistic (having opposite effects) to each other?
- Microtubules are the constituents of:
- A complex of ribosomes attached to single strand of RNA is known as:
- Fertilization in humans is practically feasible only if:
- Asthma may be attributed to:
- The avena curvature is used for bioassay of:
- The standard petal of papilionaceous corolla is also called:
- Tricarpellary, syncarpous gynoecium is found in flowers of:
- One of the major components of cell wall of most fungi is:
- In meiosis crossing over is initiated at:
- A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the F_1 plants were selfed the...
- Which of the following is the most important cause of animals and plants being driven to extinction ?
- Which one of the following is a characteristic feature of cropland ecosystem?
- Changes in GnRH pulse frequency in females is controlled by circulating levels of:
- Which of the following is not a feature of the plasmids?
- Which of the following features is not present in Periplaneta americana?
- In higher vertebrates, the immune system can distinguish self - cells and non - self. If this property is lost due to genetic...