MCQ’S ON MITOCHONDRIA
1. Cristae in mitochondria serves as sites for
(a) oxidation reduction reaction
(b) protein synthesis
(c) macromolecules breakdown
(d) flavoproteins are phosphorylated
Answer: (a)
2. Pick the incorrect statement
(a) mitochondrial DNA is known as mtDNA
(b) mitochondria is the powerhouse of the cell
(c) mitochondria is the site for calvin cycle
(d) mitochondria is the site for krebs cycle and oxidative phosphorylation
Answer: (c)
3. Inner membrane of mitochondria is rich in phospholipid _______
(a) phosphatidylserine
(b) phosphatidylinositol
(c) phosphatidylcholine
(d) cardiolipin
Answer: (d)
4. Mt DNA is
(a) simple single stranded circular DNA molecule
(b) simple double stranded circular DNA molecule
(c) simple double stranded linear DNA molecule
(d) simple single stranded linear DNA molecule
Answer: (b)
5. Inner mitochondrial membrane has
(a) cytochrome oxidase complex
(b) b-c 1 complex
(c) NADH dehydrogenase complex
(d) all of the above
Answer: (d)
6. This is not a function of mitochondria
(a) fatty acid breakdown
(b) non-shivering thermogenesis
(c) electron transport chain and associated ATP production
(d) glycolysis and associated ATP production
Answer: (d)
7. This statement is incorrect about mitochondrial membrane
(a) outer membrane is permeable to all molecule types
(b) outer membrane is resembles a sieve
(c) outer membrane embeds enzymes of electron transfer chain
(d) none of these
Answer: (c)
8. Oxysomes of F0-F1 particles take place on
(a) Chloroplast surface
(b) Thylakoid
(c) Inner mitochondrial membrane
(d) Mitochondrial surface
Answer: (c)
9. Pick the incorrect statement
(a) generally, chloroplasts are larger than mitochondria
(b) mitochondria and chloroplasts both have DNA
(c) mitochondria and chloroplasts both contain an outer and inner membrane
(d) mitochondria and chloroplasts both have an internal compartment, the thylakoid space bound by thylakoid membrane
Answer: (d)
10. Typically, the inner membrane of mitochondria is highly convoluted to form a series of infolding known as
(a) grana
(b) thylakoids
(c) cristae
(d) lamellae
Answer: (c)
MCQ’S ON GREENHOUSE EFFECT
1. These are features of higher energy level and shorter wavelengths
(a) infrared radiation
(b) alpha radiation
(c) beta radiation
(d) ultraviolet radiation
Answer: (d)
2. The normal greenhouse effect is essential for sustenance of life on Earth as it helps in maintaining the average temperature of the earth to
(a) 15 ℃
(b) 33 ℃
(c) – 18 ℃
(d) 50 ℃
Answer: (a)
3. The wavelength of infrared radiations is
(a) shorter
(b) longer
(c) infinite
(d) zero
Answer: (b)
4. Greenhouse gases present in a very high quantity is
(a) ethane
(b) carbon dioxide
(c) propane
(d) methane
Answer: (b)
5. Gas molecules absorbing thermal infrared radiation and present in large quantity to change the climate system is known as
(a) ozone gases
(b) beta radiations
(c) alpha radiations
(d) greenhouse gases
Answer: (d)
6. Burning of fossil fuels
(a) increased oxygen level
(b) increases greenhouse gases
(c) decreases greenhouse gases
(d) increased ethane level
Answer: (b)
7. This is the most potent greenhouse gas in terms of efficiency
(a) N2O
(b) CFC
(c) C2O
(d) CH4
Answer: (b)
8. This statement is false about the greenhouse effect
(a) life on the earth is possible due to the greenhouse effect
(b) the greenhouse effect is a natural process that maintains the earth’s temperature
(c) increased emission of greenhouse gases is a natural process
(d) increased emission of greenhouse gases in the atmosphere increases earth’s temperature
Answer: (c)
9. The one which is not considered as naturally occurring greenhouse gas is
(a) CFCs
(b) methane
(c) carbon dioxide
(d) nitrous oxide
Answer: (a)
10. The relative contribution of various greenhouse gases to total global warming will not be
(a) CFCs – 14%
(b) N2O – 12%
(c) Carbon dioxide – 60%
(d) Methane – 20%
Answer: (b)
