🦠 Microbiology Solved MCQs with Answers

Practice 1927 approved 🦠 Microbiology questions with verified answers from the 🧬 Medical Science subject for Pakistan exams.

1927 solved MCQs

DAHP synthetase catalyzes the condensation ofAnswer: both (a) and (b) Phosphate is considered to restrict the induction ofAnswer: secondary metabolites Free energy change (ΔG) of a reaction is referred as the amount of energyAnswer: liberated or taken up during reaction Which of the following does not produce oxygen as a product of photosynthesis?Answer: Purple sulfur bacteria When acetate is the sole source of carbon for some microorganisms, the cycle which is used, is calledAnswer: glyoxylate pathway Hexose monophosphate pathway is also known asAnswer: phosphogluconate pathway If radioactive bicarbonate was supplied to bacterial cells, which were actively synthesizing fatty acids, it is expected to find the bulk of the radioactivity inAnswer: cellular bicarbonate Standard free energy change (ΔG) can be expressed asAnswer: ΔG° = -RTlnkₑq The glyoxylate cycle is used by some microorganisms when___________ is the sole carbon source.Answer: acetate Incorporation of atmospheric N₂ to NH₄ + occurs via the process ofAnswer: nitrogen fixation The role of bacteriophyll in an oxygenic photosynthesis is toAnswer: use light energy to energize an electron TCA cycle functions inAnswer: amphibolic reactions Entner-Doudoroff pathway is found inAnswer: both (a) and (b) Anoxygenic photosynthetic bacteria oxidizeAnswer: sulfide Which of the following(s) is/are the products of the light reactions of photosynthesis?Answer: ATP, NADPH, and O₂ Which of the following catalyze liberation of orthophosphate from organic P compounds and inorganic pyrophosphate ?Answer: Alkaline phosphates For each glucose molecule broken down, there are______________number of reduced coenzymes to be oxidized.Answer: 12 As the electron flow through the chains, much of their free energy is conserved in the form of ATP. This process is calledAnswer: oxidative phosphorylation Digestive reactions where large molecules are broken down into smaller ones are referred asAnswer: catabolism Phosphate regulation has been observed in the production ofAnswer: all of these Most of the energy in aerobic respiration of glucose is captured byAnswer: electron transport of electrons from NADH During the reduction phase of the Calvin cycle, phosphoglyceric acid is reduced to______utilizing________as the reduction source.Answer: phosphoglyceraldehyde; NADPH⁺H⁺ In order to get inorganic phosphorous into organic compounds, the phosphate ion is incorporated viaAnswer: both (a) and (b) The phosphate inhibition in the clavine formation withClaviceps SD58, can be counteracted by the addition ofAnswer: tryptophan The major route for incorporation of ammonia (NH₄⁺) into organic compounds is viaAnswer: reduction of pyruvate or alpha-ketoglutarate by enzymes The specific enzyme/(s) of the glyoxylate cycle is/areAnswer: both (a) and (b) If ΔG of a chemical reaction has a negative value, the reactionAnswer: releases energy The catabolic reaction, pentose-phosphate exists inAnswer: prokaryotic and eukaryotic cells both Entner - Doudoroff pathway is not found inAnswer: eukaryotes Aerobic catabolism of glucose yields how much energy (ATP synthesized) relative to glucose fermentation?Answer: More than 10 times as much