MDCAT Online Entry Test Preparation - MIMS

MCQs 1. Acellular life forms are characterized by: A. Presence of nucleus B. Absence of cellular organization C. Ability to reproduce independently D. Presence of cytoplasm Answer: B 2. Viruses are considered non-living because they: A. Contain DNA or RNA B. Can mutate C. Lack metabolic machinery D. Have protein coat Answer: C 3. The protein coat of a virus is called: A. Envelope B. Capsid C. Nucleoid D. Plasma membrane Answer: B 4. Which of the following contains only RNA and no protein coat? A. Virus B. Bacteria C. Viroid D. Prion Answer: C 5. Prions are made up of: A. DNA only B. RNA only C. Protein only D. Lipids Answer: C 6. Which of the following diseases is caused by prions? A. AIDS B. Tuberculosis C. Mad cow disease D. Influenza Answer: C 7. Viruses replicate only inside: A. Soil B. Water C. Host cell D. Air Answer: C 8. The genetic material in viruses can be: A. Only DNA B. Only RNA C. Both DNA and RNA (but not together) D. Neither DNA nor RNA Answer: C 9. Which struct...

1. Enzymes are: A. Carbohydrates B. Lipids C. Proteins D. Vitamins Answer: C. Proteins 2. The region of enzyme where substrate binds is called: A. Active site B. Binding site C. Reaction site D. Catalytic center Answer: A. Active site 3. Enzymes speed up reactions by: A. Increasing activation energy B. Decreasing activation energy C. Increasing temperature D. Changing equilibrium Answer: B. Decreasing activation energy 4. Which model explains enzyme action? A. Fluid mosaic model B. Lock and key model C. Bohr model D. Sandwich model Answer: B. Lock and key model 5. Enzymes are specific due to: A. Shape of active site B. Temperature C. pH D. Concentration Answer: A. Shape of active site 6. A non-protein part of enzyme is called: A. Apoenzyme B. Cofactor C. Substrate D. Product Answer: B. Cofactor 7. Enzyme + Cofactor = A. Apoenzyme B. Holoenzyme C. Substrate D. Product Answer: B. Holoenzyme 8. Optimum temperature for most human enzymes is: A. 25°C B. 37°C C. 50°C D. 100°C Answer: ...

  1. Bioenergetics is the study of: A. Energy flow in living organisms B. Cell division C. DNA replication D. Protein synthesis Answer: A. Energy flow in living organisms 2. The main energy currency of the cell is: A. ADP B. ATP C. NADH D. FADH₂ Answer: B. ATP 3. The breakdown of glucose to release energy is called: A. Photosynthesis B. Respiration C. Fermentation D. Transpiration Answer: B. Respiration 4. The first step of cellular respiration is: A. Krebs cycle B. Electron transport chain C. Glycolysis D. Oxidative phosphorylation Answer: C. Glycolysis 5. Glycolysis occurs in the: A. Mitochondrial matrix B. Cytoplasm C. Nucleus D. Ribosome Answer: B. Cytoplasm 6. Total ATP produced from one glucose molecule in aerobic respiration is approximately: A. 2 ATP B. 4 ATP C. 36–38 ATP D. 100 ATP Answer: C. 36–38 ATP 7. The Krebs cycle occurs in the: A. Cytoplasm B. Mitochondrial matrix C. Inner mitochondrial membrane D. Nucleus Answer: B. Mitochondrial matrix...