MCQOPTIONS
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MCQOPTIONS
This section includes 23 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is present in both prokaryotes and eukaryotes? |
| A. | Lysosome |
| B. | Chloroplast |
| C. | Plasma membrane |
| D. | Vacuole |
| Answer» D. Vacuole | |
| 2. |
Which of the following statements about prokaryotes is false? |
| A. | Prokaryotic cells concentrate important materials for the cells survival |
| B. | The substance known as cytosol is found within the bacterial nucleus |
| C. | Prokaryotic cells are much smaller than most eukaryotic cells |
| D. | Ancient prokaryotes may have given rise to some eukaryotic organelles |
| Answer» C. Prokaryotic cells are much smaller than most eukaryotic cells | |
| 3. |
What do dystrophin, utrophin, actin, and tubulin have to do with eukaryotic cell structure and function? |
| A. | They are components in the reactions of photosynthesis |
| B. | They all participate in the degradation of large amounts of ATP |
| C. | They all participate in the production of large amounts of ATP |
| D. | They are all embedded proteins in plasma membranes |
| Answer» D. They are all embedded proteins in plasma membranes | |
| 4. |
In which of the following cell organelles, it is expected to find the biochemical reactions that harness energy from the breakdown of sugar molecules to synthesize large amounts of ATP? |
| A. | Lysosome |
| B. | Vesicles |
| C. | Mitochondria |
| D. | Plasma membrane |
| Answer» D. Plasma membrane | |
| 5. |
Which of the following macromolecules are found in the plasma membrane? |
| A. | Lipids and proteins only |
| B. | Lipids, proteins, and carbohydrates |
| C. | Proteins and carbohydrates only |
| D. | Proteins only |
| Answer» C. Proteins and carbohydrates only | |
| 6. |
Clearly defined nucleus, mitochondria in a large central vacuole and chloroplasts, indicate the group of organisms from |
| A. | bacteria |
| B. | fungi |
| C. | plants |
| D. | animals |
| Answer» D. animals | |
| 7. |
Lysosomes are specialized vesicles in __________ that contain digestive enzymes for the breakdown of food. A related organalle known as a vacuole, which is found in __________ , also contains enzymes but in addition may act as a storage organelle for nutrients or water. |
| A. | animals; plants and fungi |
| B. | plants; animals and fungi |
| C. | plants and fungi; animals |
| D. | animals and plants; fungi |
| Answer» B. plants; animals and fungi | |
| 8. |
The highly folded membranes found in such eukaryotic organelles as mitochondria and chloroplasts |
| A. | increase the surface area where key chemical processes can occur |
| B. | help the cell against physical damage |
| C. | make it possible to package large amounts of DNA within the cell |
| D. | assist with cell movement |
| Answer» B. help the cell against physical damage | |
| 9. |
Which of the following cell organelles are expected to be associated with motor proteins? |
| A. | Smooth ER |
| B. | Vesicles |
| C. | Plasma membrane |
| D. | Chloroplasts |
| Answer» C. Plasma membrane | |
| 10. |
Eukaryotic cells are more efficient than prokaryotes because their internal compartmentalization |
| A. | makes each compartment nutritionally independent of all others |
| B. | allows for specialization through the subdivision of particular tasks |
| C. | allows for specialization through merging of different tasks |
| D. | reduces overall cell size |
| Answer» C. allows for specialization through merging of different tasks | |
| 11. |
An organism's first line of defense against attack by an invader such as a virus or bacterium is usually |
| A. | to flee or hide |
| B. | its body wall |
| C. | a specific immune response |
| D. | a nonspecific immune response |
| Answer» C. a specific immune response | |
| 12. |
In which of the following cell types more cellular detail can be observed using an electron microscope compared to a light microscope? |
| A. | Animal |
| B. | Bacterial |
| C. | Protist |
| D. | All of these |
| Answer» E. | |
| 13. |
According to the fluid mosaic model of cell membranes, |
| A. | the most common type of molecules in the membrane are proteins |
| B. | basic membrane structure results from how the proteins interact with water |
| C. | the membrane is a highly mobile mixture of phospholipids and proteins |
| D. | the unique properties of cell types are determined by their phospholipids |
| Answer» D. the unique properties of cell types are determined by their phospholipids | |
| 14. |
The simplest way to differentiate a prokaryotic cell from a eukaryotic one is to |
| A. | look for a plasma membrane |
| B. | see if a nucleus is present |
| C. | check for the presence of DNA |
| D. | determine if the cell is an entire organism or not |
| Answer» C. check for the presence of DNA | |
| 15. |
Which of the following is the best criterion for deciding whether a cell is prokaryotic or eukaryotic? |
| A. | The cell came from a single-celled or multicelled organism |
| B. | The cell has a nucleus or not |
| C. | The cell has cytosol or not |
| D. | DNA is present in the cell or not |
| Answer» C. The cell has cytosol or not | |
| 16. |
Microtubules, motor proteins, and actin filaments are all part of |
| A. | the mechanism of photosynthesis that occurs in chloroplasts |
| B. | the rough ER (endoplasmic reticulum) in prokaryotic cells |
| C. | the cytoskeleton of eukaryotic cells |
| D. | the process that moves small molecules across cell membranes |
| Answer» D. the process that moves small molecules across cell membranes | |
| 17. |
In terms of basic cell structure, what do an elephant and an oak tree have in common? |
| A. | They both are eukaryotes |
| B. | They both have a cell nucleus |
| C. | They both have mitochondria |
| D. | All of the above |
| Answer» E. | |
| 18. |
Which of the following organelles is directly connected to the outer membrane of the nucleus in a eukaryotic cell? |
| A. | Mitochondrion |
| B. | Lysosome |
| C. | Golgi apparatus |
| D. | Endoplasmic reticulum |
| Answer» E. | |
| 19. |
Which of the following two organelles look most alike structurally? |
| A. | Nucleus and vesicle |
| B. | Golgi apparatus and smooth endoplasmic reticulum ER |
| C. | Vacuole and cytoskeleton |
| D. | Lysosome and chloroplast |
| Answer» C. Vacuole and cytoskeleton | |
| 20. |
Where in a eukaryotic cell, DNA can be found? |
| A. | Nucleus |
| B. | Mitochondrion |
| C. | Vacuole |
| D. | Both (a) and (b) |
| Answer» E. | |
| 21. |
Which of the following are responsible causing the diseases? |
| A. | Pathogens |
| B. | T cells |
| C. | Lymphocytes |
| D. | Macrophages |
| Answer» B. T cells | |
| 22. |
A certain cell organelle which is made of a double phospholipid bilayer that has many large pores in it, is most likely |
| A. | the nuclear envelope |
| B. | the plasma membrane |
| C. | the mitochondrion |
| D. | the cytoskeleton |
| Answer» B. the plasma membrane | |
| 23. |
Which of the following structures is expected in a bacterium? |
| A. | Nucleus |
| B. | Plasma membrane |
| C. | Golgi apparatus |
| D. | Endoplasmic reticulum |
| Answer» C. Golgi apparatus | |