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- 27) Which of the following is an enzyme which results in Staphylococcus aureus being able to spread more easily by breaking down the extracellular matrix of connective tissues. A) pyrogens B) lipase C) hyaluronidase D) neuraminidase E) M protein 28) Which of the following is a +SSRNA virus that can cause birth defects? A) chickenpox B) smallpox C) rubella D) roseola E) measles 29) The Gram-negative diplococcus. A) Haemophilus influenza B) Listeria monocytogenes C) Clostridium botulinum is resistant to phagocytosis and releases Lipid A to cause inflamnation. D) Streptococcus agalactiae E) Neisseria meningitidis 30) Listeria monocytogenes pathogenesis is directly related to its ability to A) produce a powerful toxin. C) produce a polysaccharide capsule. B) live and reproduce inside its host's cells. D) resist most antimicrobial agents. 4. 31) Disseminated intravascular coagulation (DIC) is a complication resulting from the A) release of cytotoxins. B) attachment of bacterial cells to the…Which statement among A-D is false regarding bacterial toxins? A) O Hemolysıns are cell membrane disrupters that can rupture red blood cells. B) O Second mesengar pathway disrupters like cholera toxin produces a debilitating respiratory condition of the lungs. C) O Shiga toxin, tetanus toxin, and hemolysins are all types of exotoxins. D) O Superantigens elicit a hyperactive response by the immune system and can lead to shock. E) O None are false, A-D are all true statements.Tay-Sachs disease is result from a)malfunction of cerebroside metabolism b)the accumulation of GM2 c) a defiency of GM2 d) defective lysosomes
- "Pellagra" is caused due to the deficiency of: A) Niacin B) Riboflavin C) Thiamine D) Pyridoxinewhich of the following antibiotics are batericidal? a) polymyxin b b) rifamycins c) tetracyclines d) sulfonamides e) erythromycinLysozyme does which of the following?a) Disrupts cell membranesb) Hydrolyzes peptidoglycanc) Waterproofs skind) Propels gastrointestinal contentse) Propels the cilia of the respiratory tract
- Refer to the figures above: 41) Which figure displays the rate of bacterial growth in a living animal? a) Figure A b) Figure C C) Both d) Neither e) Cannot be determined 42) Which figure tests the effects of one or more lymphocytes? a) Figure A b) Figure C c) Both d) Neither e) Cannot be determined 43) Which figure demonstrates that addition of effector PCs leads to bacterial death? a) Figure A b) Figure C C) Both d) Neither e) Cannot be determined 44) Based on these figures, Listeria infection control is most directly due to which effector cell: a) CTL b) T helper c) Macrophage d) Basophil d) None of the aboveWhich of the following sentences is NOT correct: a)CMV causes heterophil-negative mononucleosis b)Poliovirus can cause paralytic disease c)Astrovirus causes gastroenteritis only in adults d)EBV can cause nasopharyngeal carcinoma e)Mumps virus can cause meningitisA child is brought to the clinic due to repeated episodes of ear and lung infections. Investigations and history have revealed a deficiency of enzyme responsible for respiratory burst in the neutrophils .which of the following enzyme is deficient ? a) catalase b)NADPH oxidase c) superoxide dismutase d) myeloperoxidase.
- During gap junction formation, connexons in neighboring cells become tightly connected through extensive noncovalent interactions of __________. a) connexin subunit intracellular domainsb) connexin subunit extracellular domainsc) connexin carbohydratesd) connexin lipidse) polynucleotidesThe SGLT transporter may be best described as a: a) symporter b) antiporter c) pump protein d) voltage-gated channel The two emulsifying agents which aid the transport of lipids in the intestine are: a) secretin and cholecystokinin b) lipases and proteases c) bile salts and momoacylglycerols d) peptide balls and fat globules Triacylglycerols are transported from the intestinal cells to the lymph system by: a) symporters b) antiporters c) active transport pumps d) chylomicreons Triacylglycerols are re-assembled from monoacylglycerols and fatty acids at which site in the intestinal cell? A) nucleus b) mitochondria c) ribosome d) smooth endoplasmic reticulum Glycocholate is a: a) transport protein b) lipase coenzyme c) emulsifying agent d) hormoneWhich of the following are involved in strong interactions with sialyl-Lewis (CHO) groupings? a) Selectins b) Mucins c) Integrins d) a & b e) All of the Above