Cell Biology Questions and Answers – Techniques – Use of Radioisotopes

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This set of Cell Biology Multiple Choice Questions & Answers (MCQs) focuses on “Techniques – Use of Radioisotopes”.

1. The identity and chemical properties of an atom are determined by ____________
a) critical temperature
b) critical freezing point
c) melting temperature
d) number of protons
View Answer

Answer: d
Explanation: The identity and chemical properties of a compound can be determined by the number of positively charged protons it contains. For example, hydrogen has a single proton and helium has two.
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2. Isotopes have the same number of protons.
a) True
b) False
View Answer

Answer: a
Explanation: The isotopes have same number of protons but different number of neutrons in their nucleus. Hydrogen has three isotopes depending on the number of neutrons – 0, 1 or 2.

3. Which of the following is radioactive?
a) hydrogen sulfide
b) vimentin
c) tritium
d) deuterium
View Answer

Answer: c
Explanation: Depending on the number of neutrons present, the hydrogen has three isotopes. Deuterium and tritium are its isotopes, out of which tritium contains two neutrons and is radioactive.

4. The half life of a radioisotope is an _____________
a) Toll
b) NEF1
c) Transposons
d) Linker DNA
View Answer

Answer: a
Explanation: The protein Toll, present in the fruit fly, plays a dual role of promoting dorsoventral development of the embryo and providing the fly with immunity against pathogens.
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5. Which of the following emitted particles consists of two protons?
a) alpha
b) beta
c) gamma
d) zeta
View Answer

Answer: a
Explanation: Three different types of emissions are possible for an atom that is disintegrating. One type of particles that may be released is the alpha particle that consists of two protons and two neutrons (equivalent to the nucleus of a helium atom).

6. A beta particle is equivalent to an electron.
a) True
b) False
View Answer

Answer: a
Explanation: By disintegration of an atom, an alpha particle, beta particle or a gamma radiation may be emitted. Beta-particle is equivalent to an electron while the gamma radiation is the emission of photons.

7. Liquid scintillation spectrometry is a method of detecting ________________________
a) X-rays
b) α-emitters
c) β-emitters
d) Gamma-rays
View Answer

Answer: c
Explanation: Liquid scintillation spectrometry is a method of detecting the beta-emitters during disintegration of an atom. The technique is based on certain compounds termed phosphors that some of the energy of emitted particles and release it in the form of light.
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Sanfoundry Global Education & Learning Series – Cell Biology.

To practice all areas of Cell Biology, here is complete set of 1000+ Multiple Choice Questions and Answers.

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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He is Linux Kernel Developer & SAN Architect and is passionate about competency developments in these areas. He lives in Bangalore and delivers focused training sessions to IT professionals in Linux Kernel, Linux Debugging, Linux Device Drivers, Linux Networking, Linux Storage, Advanced C Programming, SAN Storage Technologies, SCSI Internals & Storage Protocols such as iSCSI & Fiber Channel. Stay connected with him @ LinkedIn