|12 Class Biology Chapter Wise Notes MCQs|
Medical Jobs Tests Preparations MCQs List
Q.1: The total aggregate of genes in a population at any one time is called the populations gene ?
Q.2: The main transmitter for synapses that lie outside the central nervous system is ?
Q.3: The union of meiotically produced specialized sex cells from each parents produce ?
- Fertilized egg
- Unfertilized egg
- Both a And c
Q.4: The tumours which are of small size and localized are ?
Q.5: The average rainfall is between 750 - 1500 mm in ?
- Temperate deciduous forests
- Coniferous alpine and boreal forests
- Tropical rain forests
- Grassland ecosystem
Q.6: Which of the following is common in all neurons ?
- A cell body which contains a nucleus
- A thick myelin sheath
- Presence of nodes of Ranvier
- Presence of Schwann cells
Q.7: Primary tissue is added by the ?
- Lateral meristem
- Underground meristem
- Apical meristem
- Vertical meristem
Q.8: The end products of haemoglobin breakdown and metabolites of various hormones is ?
Q.9: The number of nucleotides in the DNA of a typical human chromosome is about ?
- 10 Million
- 40 million
- 80 million
- 140 million
Q.10: Who was the first to propose an objective definition of instincts in terms of animal behaviour ?
Q.11: Kidney health is described in terms of ?
- The number of kidney stones
- Rate of filteration
- Water retension
- Blood clot
Q.12: Clear cytoplasm produces ?
- Larval epidermis
- Muscle cells
- Neural tube
Q.13: Excess MSH is secreted in ?
- Addison's disease
- Parkinson's disease
- Grave's disease
- Alzheimer's disease
Q.14: Annual rain fall in deserts is less than ?
- 25 to 50 cm
- 10 to 22 cm
- 15 - 25 cm
- 20 to 40 cm
Q.15: What will occur if a drug at the neuromuscular junction blocks the receptors sites on the post synaptic membrane ?
- Inhibition of Acetylchlorine release
- Muscle contraction
- Muscle paralysis
- Release of calcium ions
Q.16: The negative physiological changes in our body are said to be ?
Q.17: Bipedal locomotion freed the front appendages which become adapted for ?
- Prey capture
- Both a And b
- None of these
Q.18: Innate behavior is all but ?
Q.19: The best way to increase food production from ecosystem view point is ?
- To increase cultivable land by clearing forest
- Use of excessive fertilizers
- Use of high quality pesticides
- Use of genetically improved varieties of seeds
Q.20: A change in the community structure of an ecosystem over a period of time is ?
- Ecological niche
- Ecological mutation
- Genetic Drift
Q.21: Water is stored for use during the period of drought in fleshy stems of ?
- Both a And b
- None of these
Q.22: In hershey And chase experiment, 32p labeled bacteriophages allowed to infect the becteria. During analysis 32 p activity wa detected?
- In culture medium
- On the surface of becterial cell
- Inside the becteiral cell
- Both a and B
Q.23: Cortisol brings about an increase in blood glucose level mainly by its production from protein ?
Q.24: When the human blood leaves the capillary bed of the tissue, most of the carbon dioxide is inthe ?
- Carbonic acid
- Bicarbonate ions
- Carboxylic acids
- None of them
Q.25: Hereditary characteristics pass from parents to offspring through genes in their ?