GK Biology Questions and Answers

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Q41
Poison glands of snakes are homologous to
  • A electric organs of fishes
  • B stings of rays
  • C sebaceous glands of mammals
  • D salivary glands of vertebrates
Answer: Option D
Q42
Radical vascular bundles are those in which
  • A xylem is surrounded by phloem
  • B phloem is surrounded by xylem
  • C xylem and phloem occur on the same radius
  • D xylem and phloem occur on the different radii
Answer: Option D
Q43
Plant bends towards the source of light on account of the movement of curvature known as
  • A geotropism
  • B thigmotropism
  • C chemotropism
  • D phototropism
Answer: Option D
Q44
Plant have ____ while animals lack it.
  • A starch
  • B cellulose
  • C protein
  • D fat
Answer: Option B
Q45
Osmosis is the flow of solution from higher concentration to a solution of lower concentration through a semi permeable membrane. What is incorrect in this statement?
  • A Exact concentration of solution is not given
  • B Character of semi permeable membrane is not given
  • C The flow of solution is not possible through semi permeable membrane
  • D All are incorrect
Answer: Option C
Q46
Photosynthesis is a process
  • A reductive and exergonic
  • B reductive and catabolic
  • C reductive, endergonic and catabolic
  • D reductive, endergonic and anabolic
Answer: Option D
Q47
On which of the following plants did Gregor Mendal perform his classical experiment?
  • A Gram
  • B Maize
  • C Pea
  • D Wheat
Answer: Option C
Q48
Pigmentation of skin is due to
  • A lymphocytes
  • B monocytes
  • C leucocytes
  • D melanocytes
Answer: Option D
Q49
Norepinephrine increases
  • A respiration
  • B urine production
  • C saliva production
  • D blood pressure
Answer: Option D
Q50
Night blindness is cause by lack of which vitamin?
  • A Vitamin A
  • B Vitamin B
  • C Vitamin C
  • D Vitamin D
Answer: Option A

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