|Biology Past Papers MCQs|
2nd Year Objective Type Biology MCQs With Answers
Q.1: ---------regulates the kidney's retention of water ?
- Vasopressin (ADN)
Q.2: In humans ,MSH(melanocyte-stimulating hormone) -------------- ?
- Regulates primary skin color
- Causes the thyroid to produce thyroxin
- Governs the rate of tarming
- Concentration is very low.
Q.3: In the eighteenth century organisms were classified by ?
- Charles Darwin
- Alfred Wallace
- Carolus Linnaeus
- J.B Lamarck
Q.4: An animal that worms itself mainly by absorping from its surroundings is known as ?
- None of these
Q.5: The kinetochore fibres of spindle attach to the kinetochore region of chromosome and align them at the equator of the spindle forming ?
- Equatorial plate
- Metaphase plate
- Central plate
- Both a And b
Q.6: The wall of trachea(windpipe) and bronchi of man is fernished with a series of incomplete ?
- Cartilagenous plates
- Chitinous rings
- Cartilaginous rings
- Muscular rings
Q.7: In 1944 Oswald Avery along with Colin Macleod and Maclyn McCarty repeated experiments of ?
Q.8: Among the birds Drawin collected 13 types of ?
Q.9: The study of hman populations and things that affect them is called ?
Q.10: External genitalia of human male consist of a pair of testes which lie outside the body in the sac like ?
Q.11: Evolutionary relationships among species are reflected in their ?
- DNA and proteins
Q.12: Trial and error learning has no role in ?
- Operant learning
- Classical conditioning
Q.13: A clear picture of the genetic basis of sex determination emerged after the discovery of ?
- X chromosomes
- Sex chromosomes
- Y chromosomes
Q.14: Histones are positively charged due to an abundance of the basic amino acids ?
- Both a And c
Q.15: DNA changes are called mutations and the organisms that have undergone such changes are called ?
- Wild types
Q.16: Myoglobin has a special function in muscle tissue ?
- It breaks down glycogen
- It is a contractile protein
- It holds a reserve supply of oxygen in the muscle
- None of these
Q.17: In human only one ovum is usually discharged from the ovary at one time this phenomenon is ?
Q.18: Germ cells in the ovary produce many ?
Q.19: A natural process in which surface soil is removed by the action of water or wind is ?
Q.20: First essential phenomenon of meiosis i.e pairing of homologous Chromosomes called synapsis ?
Q.21: Some dominant trees of temperate deciduous forests are ?
- Taxus baccata
- Pinus wallichiana
- Berberis lyceum
- Both a,b and c
Q.22: Buoyancy in the water is maintained by a specialized structure in bony fish called ?
- Swim bladder
- Both a And c
Q.23: Armadillos the armoured mammals live only in the ?
Q.24: The addrenaline cortex produces ------ ?
Q.25: Why is there no glucose present in the filterate in the distal tubule of a nephron ?
- Its molecules are two large to pass across the base ment membrane
- It is removed by osmosis from the tubule
- It is positively absorp by the cells lining the descending loop of henie
- He is actively absorb by hte proximal tubule cells