MMBIO 221 Exam 1 BYU Latest Questions With Solved Correctly Answers!!

Fungi - Answer-cell wall made of chitin; Eukaryote Algae - Answer-cell wall made of silicates, eukaryotic Protozoa - Answer-Eukaryote Bacteria - Answer-Prokaryotic Virus - Answer-Acellular; only reproduce if they are inside of a living cell What allows a substance to cross a membrane - Answer-Protiens Substances that will never pass through a membrane - Answer-Charged substances Passive movement processes - Answer-No ATP needed 1. Diffusion 2. Facilitaed Diffusion 3. Osmosis Active Transport processes - Answer-Uniport Aniport Symport Group translocation Glycocalyx - Answer-Sticky substance on outside of cell, composed of polysaccharides,Capsule - Answer-A sticky layer that prevents cell from drying out, prevents bacteria from being recognized Flagella Direction - Answer-Counter clock = forward clockwise = backwards Peritrichous vs monotrichus - Answer-One hair vs thousands of hairs Fimbriae - Answer-Helps in movement, not as long as flagella, used to adhere to other bacteria Pili - Answer-short, hairlike protein structures on the surface of some bacteria Bacteria with no cell walls - Answer-Mycoplasma What are most bacteria cell walls composed of? - Answer-Peptidoglycan = NAG-NAM chains, ONLY FOR PROKARYOTES Gram-Positive cell wall - Answer-Thick peptidoglycan Teichoic acids Gram-Negative cell walls - Answer-Thin peptidoglycan