Q1.Cyanobacteria are a) phototrophs b) organotrophs c) heterotrophs d) mixotroph

Question

Q1.Cyanobacteria are

a) phototrophs

b) organotrophs

c) heterotrophs

d) mixotrophs

Q2. Marine snow is

a) snow that falls over cold ocean surfaces along mid?ocean ridges

b) sinking aggregates of organic matter in the water column

c) a particular type of toxin produced by marine phytoplankton

d) dead viruses littering the ocean floor

Q3.The Microbial Loop describes

a) the lysis of Emiliania huxleyi with the release of DMS to the atmosphere

b) the lysis of bacteria by marine microorganisms

c) how Dissolved Organic Carbon is returned to higher trophic levels in the oceans

d) how bacterial cultures are streaked on agar plates

Q4.The group of microbes involved in the production of methane from acetic acid during anaerobic digestion are the

a) acidogens

b) acetogens

c) hydrolytic bacteria

d) acetoclastic archaea

Q5.The term “umami” refers to

a) a maternal dependency

b) a flavour produced by glutamine

c) a characteristic of soy beans

d) a flavour produced by glutamate

Q6.The main endogenous electron carrier used by yeast cells during fermentation is

a) NAD+
b) NAP+
c) ATP+

d) ADP+

Q7.Yeast cells produce ethanol from acetaldehyde because

a) they can derive energy directly from the ethanol
b) ethanol production allows the electron acceptor pool to be replenished

c) it improves the quality of their environment
d) acetaldehyde is toxic to yeast cells

Q8. Immunosensors are composed of

a) a target-specific antibody and a signal-transducing method
b) a signal-transducing antibody and a target-specific ligand
c) a target-specific enzyme and a signal-transducing method
d) a target-specific DNA molecule and a signal-transducing antibody

Q9.In relation to respiration, which of the following statements is true?

a) Only humans can respire

b) It is less efficient than fermentation at generating energy
c) It requires an electron acceptor

d) It doesn’t produce any waste products

Q10. The percentage of microorganisms that are cultivable is estimated to be

a) 85-100%
b) 50-85%
c) 10-20%

d) <5%

Q11.??lactam antibiotics target which of the following to effect their antibacterial activity?

a) Protein synthesis machinery

b) DNAsynthesismachinery

c) The cytoplasmic membrane

d) The cell wall

Q12.During a ‘redox’ reaction, the electron acceptor is said to become

a) oxidised

b) hydrolysed
c) phosphorylated

d) reduced

Explanation / Answer

Q1. Cyanobacteria are- a) phototrophs

Q2. Marine snow is- b) sinking aggregates of organic matter in the water column

Q3. The Microbial Loop describes- c) how Dissolved Organic Carbon is returned to higher trophic levels in the oceans

Q4. The group of microbes involved in the production of methane from acetic acid during anaerobic digestion are the- d) acetoclastic archaea

Q5. The term “umami” refers to- d) a flavour produced by glutamate

Q6.The main endogenous electron carrier used by yeast cells during fermentation is - a) NAD+

Q7. .Yeast cells produce ethanol from acetaldehyde because- d) acetaldehyde is toxic to yeast cells

Q8. Immunosensors are composed of- a) a target-specific antibody and a signal-transducing method

Q9. In relation to respiration, which of the following statements is true? - c) It requires an electron acceptor

Q10. The percentage of microorganisms that are cultivable is estimated to be - c) 10-20%

Q11. ??lactam antibiotics target which of the following to effect their antibacterial activity? - d) The cell wall

Q12. During a ‘redox’ reaction, the electron acceptor is said to become- d) reduced

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