MCQOPTIONS
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MCQOPTIONS
This section includes 36 Mcqs, each offering curated multiple-choice questions to sharpen your Biotechnology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In plant cells, which of the following is not a function of the large central vacuoles of plant cells? |
| A. | Storage of food |
| B. | Support |
| C. | Contractile regulation of |
| D. | Waste storage water content |
| Answer» D. Waste storage water content | |
| 2. |
Why do some redox reactions in cells result in the transfer of electrons from a reductant with a higher standard redox potential to an oxidant with a lower standard redox potential? |
| A. | Redox potentials are defined under standard conditions, and cellular conditions are typically not standard conditions |
| B. | The rules governing oxidation and reduction apply only in vitro, and not in vivo |
| C. | Electrons always go from reductants with high redox potentials to oxidants with low redox potentials |
| D. | None of the above |
| Answer» B. The rules governing oxidation and reduction apply only in vitro, and not in vivo | |
| 3. |
Lysosomes are associated with |
| A. | photosynthesis |
| B. | respiration |
| C. | storage |
| D. | digestion |
| Answer» E. | |
| 4. |
Mitochondria can be expected most numerous in |
| A. | green cells |
| B. | red blood cells |
| C. | muscle cells |
| D. | none of these |
| Answer» D. none of these | |
| 5. |
Which of the following statements about the outer mitochondrial membrane is not true? |
| A. | The outer membrane is impermeable to hydrogen ions |
| B. | The outer membrane is highly permeable to substances of small molecular weight |
| C. | The outer membrane is about 50% lipid and 50% protein by weight |
| D. | The outer membrane contains porins |
| Answer» B. The outer membrane is highly permeable to substances of small molecular weight | |
| 6. |
Specialized type of peroxisome and the site of glyoxylate pathway in certain plants is known as |
| A. | gly-peroxisome |
| B. | lysosome |
| C. | glyoxysome |
| D. | none of these |
| Answer» D. none of these | |
| 7. |
Which of the following observations is not used as evidence to support the concept of endosymbiotic origin of chloroplasts and mitochondria? |
| A. | Both have their own DNA |
| B. | Both have their own ribosomes |
| C. | Both strongly resemble prokaryotes, especially in size |
| D. | Both can live and function independently of the cell |
| Answer» E. | |
| 8. |
Cellular organelles are embedded in the |
| A. | endoplasmic reticulum |
| B. | cristae |
| C. | cytosol |
| D. | microtubules |
| Answer» D. microtubules | |
| 9. |
Which molecule serves as a carrier of fatty acids in mitochondria? |
| A. | Acetyl-CoA |
| B. | Carnitine |
| C. | Dolichol |
| D. | Malonyl-CoA |
| Answer» C. Dolichol | |
| 10. |
If the ester bonds of a triacylglycerol molecule's are broken then the kind of molecule, which would be soluble in water, is |
| A. | fatty acid |
| B. | steroid |
| C. | glycogen |
| D. | glycerol |
| Answer» E. | |
| 11. |
The cell membrane is made up of |
| A. | lipoproteins |
| B. | cellulose |
| C. | phospholipids |
| D. | phosphoproteins |
| Answer» B. cellulose | |
| 12. |
Both plant and animal cell possess |
| A. | cell walls |
| B. | mitochondria |
| C. | central vacuoles |
| D. | chloroplast |
| Answer» C. central vacuoles | |
| 13. |
A cell without cell wall is called |
| A. | apoplast |
| B. | protoplast |
| C. | symplast |
| D. | none of these |
| Answer» C. symplast | |
| 14. |
Tonoplast is a membrane around |
| A. | cytoplasm |
| B. | vacuole |
| C. | nucleus |
| D. | mitochondria |
| Answer» C. nucleus | |
| 15. |
The cellular organelle associated with secretion is the |
| A. | golgi complex |
| B. | mitochondrion |
| C. | ribosome |
| D. | lysosome |
| Answer» B. mitochondrion | |
| 16. |
"The universe tends towards maximum disorder" is stated by |
| A. | first law of thermodynamics |
| B. | second law of thermodynamics |
| C. | third law of thermodynamics |
| D. | none of the above |
| Answer» C. third law of thermodynamics | |
| 17. |
Water content of active protoplasm is |
| A. | 10% |
| B. | 40% |
| C. | 70% |
| D. | 90% |
| Answer» E. | |
| 18. |
What is the source of free energy ( G) for moving protons out of mitochondria against their concentration and electrical gradients? |
| A. | Glycolysis |
| B. | Creatine phosphate |
| C. | The redox reactions of electron transport |
| D. | ATP |
| Answer» D. ATP | |
| 19. |
The cellular organelle associated with photosynthesis is the |
| A. | golgi complex |
| B. | mitochondrion |
| C. | lysosome |
| D. | chloroplast |
| Answer» E. | |
| 20. |
Which part of a plant contains the male sex cell? |
| A. | Ova |
| B. | Style |
| C. | Stamen |
| D. | Pollen |
| Answer» E. | |
| 21. |
Any system that is not at equilibrium |
| A. | is thermodynamically unstable, although it may be kinetically stable |
| B. | is kinetically unstable, although it may be thermodynamically stable |
| C. | is rushing toward equilibrium at a very rapid rate |
| D. | requires an enzyme to reach equilibrium |
| Answer» B. is kinetically unstable, although it may be thermodynamically stable | |
| 22. |
Which of the following functional groups would make a carbon-based compound the least polar? |
| A. | Phosphate |
| B. | Methyl |
| C. | Carboxyl |
| D. | Amino |
| Answer» C. Carboxyl | |
| 23. |
Which is not true about a photon? |
| A. | It is a packet of light energy |
| B. | The shorter the wavelength, the greater the energy of the photons |
| C. | It is trapped by photosynthetic unit |
| D. | It donates electron to reduce carbon dioxide to glucose |
| Answer» E. | |
| 24. |
If the ends of the following polysaccharide are pulled, which one would stretch the most? |
| A. | Glycogen |
| B. | Starch |
| C. | Cellulose |
| D. | None of these |
| Answer» C. Cellulose | |
| 25. |
Which of the following is not an electron carrier class in the electron transport chain? |
| A. | Flavoproteins |
| B. | Cytochromes |
| C. | Iron - sulfur proteins |
| D. | Cytochrome c oxidase |
| Answer» E. | |
| 26. |
The composition of the inner mitochondrial membrane is most like that of |
| A. | the outer mitochondrial membrane |
| B. | the cell's plasma membrane |
| C. | some bacterial plasma membranes |
| D. | the nuclear membrane |
| Answer» D. the nuclear membrane | |
| 27. |
Which cell type is likely to have the most mitochondria? |
| A. | Fast-twitch muscle |
| B. | Slow-twitch muscle |
| C. | Liver cells |
| D. | Adipose cells |
| Answer» C. Liver cells | |
| 28. |
Which of the following statements about mitochondrial proteins is true? |
| A. | All mitochondrial proteins are coded for and synthesized in the mitochondria |
| B. | Some mitochondrial proteins are coded for and synthesized in the mitochondria and others |
| C. | All mitochondrial proteins are imported from the cytoplasm |
| D. | Mitochondrial proteins arise from other mitochondrial proteins |
| Answer» C. All mitochondrial proteins are imported from the cytoplasm | |
| 29. |
Which of the following elements is likely to form the least polar covalent bond with hydrogen? |
| A. | Nitrogen |
| B. | Oxygen |
| C. | Carbon |
| D. | Phosphorus |
| Answer» D. Phosphorus | |
| 30. |
The fluid matrix of a cell is called the |
| A. | nucleus |
| B. | cytosol |
| C. | cytoskeleton |
| D. | endoplasmic reticulum |
| Answer» C. cytoskeleton | |
| 31. |
Chemical energy is supplied to eukaryotic cells by |
| A. | chloroplasts and golgi complexes |
| B. | mitochondria and ribosomes |
| C. | mitochondria only |
| D. | mitochondria and chloroplasts |
| Answer» E. | |
| 32. |
Which of the following can be found as a part of the mitochondrial matrix? |
| A. | Ribosomes |
| B. | DNA |
| C. | Enzymes |
| D. | All of these |
| Answer» E. | |
| 33. |
Cellular metabolism is an example of |
| A. | equilibrium metabolism |
| B. | steady-state metabolism |
| C. | a series of reactions occurring under standard conditions |
| D. | a series of reactions that defy the second law of thermodynamics |
| Answer» C. a series of reactions occurring under standard conditions | |
| 34. |
The element neon (Ne) has eight electrons in its outermost electron shell. How many covalent bonds will Ne readily form? |
| A. | None |
| B. | One |
| C. | Two |
| D. | Four |
| Answer» B. One | |
| 35. |
The mitochondria were known in the nineteenth century to be osmotically active on the basis of evidence that |
| A. | the mitochondrial matrix is hypotonic to the cellular cytoplasm |
| B. | the mitochondrial matrix is hypertonic to the cellular cytoplasm |
| C. | mitochondria were derived from a symbiotic bacterium |
| D. | mitochondria are surrounded by a semi permeable membrane |
| Answer» E. | |
| 36. |
If complex III were incorporated into an artificial lipid vesicle in order to demonstrate it's proton translocating ability in isolation, which of the following would be an appropriate electron donor? |
| A. | Cytochrome c red |
| B. | Cytochrome c peroxidase |
| C. | Ubiquinol (UQH2) |
| D. | Cytochrome c oxidase |
| Answer» D. Cytochrome c oxidase | |