Biology, 16.07.2019 16:00 jessicajamah3289
Which of the following describes a cell structure that a gram-negative bacterium has that a gram-positive bacteria does not have? a. a membrane-enclosed nucleus in which dna is stored and protected b. a membrane-bound mitochondrion in which energy for the cell is made c. an electrically charged sugar molecule that is attracted to sodium ions d. an extra layer that is outside the peptidoglycan layer of the cell wall
Answers: 2
Biology, 21.06.2019 15:30
Order the steps of protein synthesis. amino acids are lined up in a sequence. rna is modified into mrna. dna is transcribed. a ribosome binds to mrna. chemical bonds are formed and a protein is produced.
Answers: 3
Biology, 21.06.2019 17:10
Salmonella typhimurium is a food-borne bacterial pathogen that can cause severe gastrointestinal disease. salmonella is often phagocytosed by macrophages that normally destroy bacterial pathogens, but this bacterium is somehow able to prevent the complete maturation of phagolysosomes. salmonella is able to tolerate the low ph of phagolysosomes, and in fact responds to the drop in ph by secreting toxins that interfere with other cellular responses. which of the following differences would you expect to contribute to the survival of a bacterium within an salmonella-containing phagosome, compared to a healthy phagolysosome? decreased activity of acid hydrolases increased activity of acid hydrolases decreased import of h+ ions increased import of h+ ions my guess is decreased activity of acid hydrolases but i'm not sure.
Answers: 1
Biology, 22.06.2019 03:00
Discuss the functions of epithelial connective nerviud and muscular tissues
Answers: 3
Which of the following describes a cell structure that a gram-negative bacterium has that a gram-pos...
Chemistry, 10.10.2019 11:50
Mathematics, 10.10.2019 11:50
Mathematics, 10.10.2019 11:50
Mathematics, 10.10.2019 11:50
Advanced Placement (AP), 10.10.2019 11:50
Chemistry, 10.10.2019 11:50
English, 10.10.2019 11:50
History, 10.10.2019 11:50