GK-Biology Question and Answer
GK-Biology Question and Answer
62. Plants are killed in winter by frost
- because of desiccation and mechanical damage to the tissues
- because no photosynthesis takes place at such low temperature
- because respiration ceases at such low temperature
- because there is no transpiration
63. One of the following is most suitable for study of mutations
- Haploids
- Diploids
- Tetraploids
- Polyploid
65. Oxygen in our blood is transported by a protein named
- haemoglobin
- keratin
- collagen
- myoglobin
67. 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?
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?
- Having waited a day, it is too late to take an antibiotic
- You need an antiseptic, not an antibiotic
- You need to be vaccinated instead of taking an antibiotic
- You are infected by a virus
68. Plants that grow under average temperature and moisture are called
- halophytes
- hydrophytes
- mesophytes
- xerophytes
69. Oxyreductases, transferases, hydrolases, lyases, isomerases and ligases are all classes of
- hormones
- enzymes
- proteins
- vitamins
70. Mutation is
- a factor responsible for plant growth
- a change which affects the offspring of F2 generation only
- a change that is inherited
- a change which affects the parents