Biophysics - Questions and Answers for Competitive Exams | GkSeries

13. Out of the following, which is not emitted by radioactive substance

• [A] Electrons
• [B] Electromagnetic radiations
• [C] Alpha particles
• [D] Neutrons

Answer: Option [D]

14. Sound waves in air are

• [A] transverse
• [B] longitudinal
• [C] electromagnetic
• [D] polarised

Answer: Option [B]

15. Materials for rain-proof coats and tents owe their water-proof properties to

• [A] Surface tension
• [B] viscosity
• [C] Lux
• [D] pascal

Answer: Option [A]

16. Sound of frequency below 20 Hz is called

• [A] audio sounds
• [B] infrasonic
• [C] ultrasonic
• [D] supersonics

Answer: Option [B]

17. Moment of inertia is

• [A] vector
• [B] scalar
• [C] phasor
• [D] tensor

Answer: Option [D]

18. Mercury is commonly used as a thermometric fluid rather than water because

• [A] specific heat of mercury is less than water
• [B] specific heat of mercury is more than water
• [C] mercury has greater visibility than water
• [D] density of mercury is more than the water

Answer: Option [C]

19. Radiocarbon dating technique is used to estimate the age of

• [A] Rocks
• [B] Fossils
• [C] Tree
• [D] Leaf

Answer: Option [B]

20. Light from the Sun reaches us in nearly

• [A] 2 minutes
• [B] 4 minutes
• [C] 8 minutes
• [D] 10 minutes

Answer: Option [C]

21. The types of inhibition pattern based on Michaelis Menten equation are

• [A] competitive
• [B] non-competitive
• [C] uncompetitive
• [D] all the above

Answer: Option [D]

22. Microbiosensors are based on

• [A] ions effect
• [B] ionsensitive field effect transistor
• [C] piezoelectric effect
• [D] magnetic effect

Answer: Option [B]

23. An allosteric inhibitor of an enzyme usually

• [A] participates in feedback regulation
• [B] denatures the enzyme
• [C] is a hydrophobic compound
• [D] causes the enzyme to work faster

Answer: Option [A]

24. Which of the following technology is used for micro array manufacturing

• [A] Photolithography
• [B] Ink jetting
• [C] Contact printing
• [D] All the above

Answer: Option [D]