MICROBIOLOGY STUDY QUESTIONS AND THEIR CORRECT AND EXPECTED ANSWERS

Which of the following is true regarding the bacterial plasma membrane only, and not the archaeal plasma membrane? The bacterial plasma membrane only occurs as a bilayer. Choose the true statement(s) about prokaryotic external appendages. To be marked correct, you'll need to select all true statements, as there may be more than one correct answer. Pili allow for adhesion, movement, and aid in gene transfer through conjugation. Flagella allow for motility. The glycocalyx promotes adhesion and interferes with phagocytosis. All of the following are examples of inclusion bodies in prokaryotic cells except __________. endospores these are carboxysomes magnetosomes glycogen granules Which of the following are bacteria that initially had a cell wall and lost it either through the course of their life cycle or due to mutation? L-form bacteria Choose the false statement about cellular transport mechanisms. Diffusion is the passive movement of substances from areas of low concentration to areas of high concentration. True Facilitated diffusion does not require energy and uses membrane proteins to move substances down their concentration gradient. Active transport requires energy and uses carrier proteins to move substances against their concentration gradient. Osmosis is the passive movement of water from a low-solute concentration to a high-solute concentration. Choose the true statement(s) about prokaryotic cells. All prokaryotes are unicellular organisms. Most of a prokaryote's nutrients are obtained through diffusion. All prokaryotes lack a membrane-bound nucleus and organelles. Choose the true statement about the Domain Bacteria. The Domain Bacteria is made up of prokaryotes and likely originated 3.8 billion years ago. Choose the false statement regarding prokaryotic plasma membranes. Ions and large polar substances can diffuse through the plasma membrane without assistance. True Gases, water, and small non-charged substances can diffuse through the selectively permeable plasma membrane. The plasma membrane's phospholipid bilayer contains hydrophilic phosphates and hydrophobic fatty acids. The plasma membrane is a phospholipid bilayer that serves as barrier for a cell. Choose the true statement(s) about acid-fast bacteria. Genera Nocardia and Mycobacterium are acid-fast and stain pink during the acid-fast staining procedure. Acid-fast bacteria have a waxy lipid called mycolic acid in their cell walls. Acid-fast staining is important in the diagnosis of leprosy and tuberculosis. Prokaryotic cells house a single circular chromosome in their __________. nucleoid region Which of the following is mismatched? Ascospores; asexual reproduction Correct Basidiospores: sexual spores found in mushroom Sporangiospores: asexual spores Zygospores: sexual reproduction Select the false statement about the differences between eukaryotes and prokaryotes. Prokaryotic cells can exhibit both asexual and sexual reproduction, whereas eukaryotes only carry out asexual reproduction. True Eukaryotes have a defined nucleus and other membrane bound organelles, while prokaryotes lack a nucleus. Prokaryotes only include unicellular archaea and bacteria. Most prokaryotes have a single circular chromosome, as compared to a eukaryote's larger genome spread across multiple linear chromosomes. Choose the true statement(s). The four kingdoms of eukaryotes include Animalia, Plantae, Fungi, and Protista. The four kingdoms of eukaryotes each include members that may conduct sexual and/or asexual reproduction. Kingdom Fungi includes unicellular and multicellular organisms. Choose the true