|Second Year Biology MCQs|
12th Class Biology MCQs With Answers
Q.1: Inheritance of skin colour in man is controlled by eight pairs of genes , which are ?
- Multiple alleles
- Assorting independently
Q.2: The causes of green house effect are ?
- Over urbanization
- All of them
Q.3: According to one of the speculations life may have begun deep in the oceans in underwater hot springs called hydrothermal ?
Q.4: Each muscle fibre contains a large number of myofibrils having a diameter of ?
- 1 - 2 mm
- 1 - 5 mm
- 2 - 4 mm
- 3 - 7 mm
Q.5: Similarity in characteristics resulting from common ancestry is known as ?
- Evolutionary relationship
Q.6: A monochromat can perceive ?
- Three colours
- Yellow colours
- Only ane colour
- Two colours
Q.7: DNA threads are chemically cut into pieces of different sizes in ?
- Maxam-Gilbert method
- Sanger's method
- Smith's method
- Sanford's method
Q.8: ABO blood group system was discovered by ?
- Karn Ladsteiner
Q.9: Cocklebur (Xanthium),chrysanthemum,soyabean,tobacco,strawberry are examples of ?
- Short day plants
- Long day plants
- Day-neutral plants
- None of these
Q.10: Which will occur as a result of nondescent of the testes ?
- Mal esex hormones will not be circulated in the body
- Sperm will have no means of exit from the body
- Inadequate blood supply will retard the development of the testes
- Variable sperm willnot be produced
Q.11: In 1970 Hamilton D.Smith at Johns Hopkins University isolated the first ?
- DNA polymerase
- DNA ligase
- Restriction enzyme
Q.12: A network of very fine threads called chromatin can be visualized in call during ?
Q.13: The simplest form of learning is ?
- Latent learning
- Insight learning
Q.14: In the double helix of DNA adenine forms two hydrogen bonds with ?
Q.15: The groups of ribosomes present in the cell body of the neuron, which are associated with nough endoplasmic reticulum are called?
- Meissner's corpusles
- Pacinian corpucles
- Nissl's gronules
- Lysosome granules
Q.16: Genetic code is a combination of 3 nucleotides in DNA which specify a particular ?
- Amino acid
- Fatty acid
Q.17: A pair of kidneys consists of millons of functional units called ?
Q.18: Bowman capsule continues as extensively convoluted proximal tubule loop of henie and the distal tubule which empties into ?
- Collecting tubules
- Malpighian tubules
- Renal tubules
- Neural tubules
Q.19: The gene for blue opsin is present on autosome ?
Q.20: The mammalism forebrain is differetiated into the thalamus, imbic system and the ?
Q.21: In grassland ecosystem annual rainfall is about 250 to ?
- 350 mm
- 450 mm
- 650 mm
- 750 mm
Q.22: Jean Baptiste Lamarck published his theory of evolution in ?
Q.23: Dialysis cleans the blood either by ?
- Passing it through an artificial kidney
- Filtering it within abdomen
- Removing the whole blood from body
- Both aAndb
Q.24: If fertilization does not occur the corpus luteum starts ?
- Menstrual cycle
Q.25: Which plants have the adaptation to remove the flooding of its cells in fresh water ?