Lecture Exam 1B Biol102 Fall18 Multiple Choice: Each Question 2 marks 1. Resolut

Question

Lecture Exam 1B Biol102 Fall18 Multiple Choice: Each Question 2 marks 1. Resolution power of electron microscope is A) 0.2um B)0.2nm C)0.2mm D) 2.0cm 2. Deoxyribose lose O at A)C B)C C)G D)G 3. Cell membrane is fluid due to movement of A) cholesterol B) protein phospholipid D) eycolpid 4. Plant cells placed in 1.2% NaCl solution A) flaccid B) turgid C) plasmolyzed D) none of these 5. Number of covalent bonds formed by nitrogen is A)1 B)2 C)3 D4 E)S 6. Aquaporins are A) holes in phospholipid bilayer 8) channel 7. The control of solute concentrations and water balance in Paramecium is ) phospholipid D) slycolipid protein C) carrier protein D) none of the A) osmoregulation B) plasmolysis C) osmosis D) all of these 8. The diffusion of ions across a membrane is along A) electrical gradient B) concentration gradient C) electrochemical gradientD) none of these 9. Small channels between plant cells A) gap junction B) stomata C) desmosome D) plasmodesmata 10. Cell-cell recognition is due tomolecule in cell membrane A) cholesterol B) protein C) phospholipid D) branched sugar chain 11. Small part of enzyme comes in direct contact with substrate A) active site B) allosteric site C) inhibition site D) activation site 12. B-Pleated representsstructure in proteins A) primary B) secondary C) tertiary D) none of these 13. A RBC placed in 1.2% Naci solution A) same size B)Bet bigger q shrinks 14. No membrane bound organelle assembles ribosomal units b) all of these A)lysosome B)peroxisome C) nucleolus D) centrosome 15. DNA coiled around 8 histones forms unit A) chromatin B) chromatid C) nucleosome D) chromosome 16. Unique N-base present in RNA is A) uracil B)cytosine C) thymine D) adenine 17. Alcohols and acids are joined by-bond A) peptide 8) glycosidic C) ester D) diester 18. Cellulose is a polymer of A) -glucose B) -glucose amino acids D) acetylglucosamine 19. Motor proteins move vesicles on A) microtubule B) intermediate filament C) microfilament D) all of these 20. The arrangement of microtubules in eukaryotic flagella is A)9+2 B)9 3 C)9+0 D) no microtubules

Explanation / Answer

1 - The correct answer is option B that is 0.2nm.

2 - The correct answer is option B that is C2.

3 - The correct answer is option A that is cholesterol

4 - The correct answer is option B that is turgid.

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