Answer all circle the final anewer for that question with PEN questions on the S

Question

Answer all circle the final anewer for that question with PEN questions on the Scantron sheet. only if you erase. 1. Prokaryotic cells have: ll c) mitochondria a) a nuclear membrane b) a cell wa d) chloroplasts e) all of the above 2. Yeasts are: ungi b) protozoa c) helminths d) bacteria e) viruses 3. Which of the following is true about protozoa? a) They have a rigid cell wall. b) They are often motile c) They are prokaryotic. d) They are multicellular organisms. 4. Who first used phenol (carbolic acid) to reduce the incidence of post-surgical infections? a) Pasteur d) Ehrlich e) Lister b) van Leeuwenhoek c) Semmelweis 5. Who introduced handwashing to reduce the incidence of childbirth fever? a) Pasteur b) van Leeuwenhoek c) Semmelweis d) Ehrlich e) Lister 6. Fleming: a) disproved spontaneous generation b) isolated the causative agent of tuberculosis c) discovered penicillin d) developed the first anti-microbial drug which was against syphilis in diameter. 7. Bacterial cells are usually b) 0.5-2m c) 10-50m a) 1 -2 mm d) 0.1 - 0.5 nm e) 1 2 cm 8. Which of the following is true about ribosomes? a) They are the site of DNA synthesis. b) . c) Ribosomes are the same in prokaryotes and eukaryotes. d) Prokaryotic and eukaryotic ribosomes are different. Prokaryotes do NOT have ribosomes

Explanation / Answer

1- The correct answer is option B that is a cell wall that gives prokaryotes proper shape and rigidity.

They don't have nucleus so won't have nuclear membrane and do not even have membrane bound organelles like mitochondria and chloroplast. So option A,C and D are wrong answers.

2 -A) Fungi is the correct answer.

3 -B) They are often motile is the correct answer.

They are eukaryotic, unicellular orgnaism that doesn't have very thick wall because they lack chitin. So,options A, C and D are not the correct answers.

4 -D ) Lister is the correct answer.

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