GK Biology Questions and Answers

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Q61
Number of chromosomes in Down's syndrome is
  • A 46
  • B 47
  • C 48
  • D 49
Answer: Option B
Q62
Plants are killed in winter by frost
  • A because of desiccation and mechanical damage to the tissues
  • B because no photosynthesis takes place at such low temperature
  • C because respiration ceases at such low temperature
  • D because there is no transpiration
Answer: Option A
Q63
One of the following is most suitable for study of mutations
  • A Haploids
  • B Diploids
  • C Tetraploids
  • D Polyploid
Answer: Option A
Q64
Pulses are a good source of
  • A carbohydrates
  • B fats
  • C proteins
  • D vitamins
Answer: Option C
Q65
Oxygen in our blood is transported by a protein named
  • A haemoglobin
  • B keratin
  • C collagen
  • D myoglobin
Answer: Option A
Q66
Nymph is the name of young one of
  • A butterfly
  • B beetle
  • C housefly
  • D cockroach
Answer: Option D
Q67
One day you wake with a sore throat and a runny nose. Your doctor takes a swab from your throat, sends it to a lab, and telephones you the next day to say that antibiotic will not help you get better. Which of the following is the most likely reason for the doctor's statement?
  • A Having waited a day, it is too late to take an antibiotic
  • B You need an antiseptic, not an antibiotic
  • C You need to be vaccinated instead of taking an antibiotic
  • D You are infected by a virus
Answer: Option D
Q68
Plants that grow under average temperature and moisture are called
  • A halophytes
  • B hydrophytes
  • C mesophytes
  • D xerophytes
Answer: Option C
Q69
Oxyreductases, transferases, hydrolases, lyases, isomerases and ligases are all classes of
  • A hormones
  • B enzymes
  • C proteins
  • D vitamins
Answer: Option B
Q70
Mutation is
  • A a factor responsible for plant growth
  • B a change which affects the offspring of F2 generation only
  • C a change that is inherited
  • D a change which affects the parents
Answer: Option C
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