14) In animal cells, hydrolytic enzymes are packaged to prevent general destruct
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14) In animal cells, hydrolytic enzymes are packaged to prevent general destruction of cellular components. Which of the following organelles functions in this compartmentalization? 1 A) peroxisome B) chloroplast C) central vacuole D) lysosome E) glyoxysome 15) Which of these is the most common compound in the cell walls of gram-positive bacteria? 15) A) peptidoglycan B) protein C) lignin D) cellulose E) lipopolysaccharide 16) Which structure is the site of the synthesis of proteins that may be exported from the cell? 16) A) tight junctions B) rough ER D) lysosomes E) Golgi vesicles 17) When biologists wish to study the internal ultrastructure of cells, they most lskely would use 17) A) a scanning electron microscope B) a light microscope. C) a transmission electronic microscope D) A and B E) B and C 18) The host range of a virus is determined by A) the proteins in the host's cytoplasm B) whether its nucleic acid is DNA or RNA. C) the proteins on its surface and that of the host. D) the enzymes carried by the virus E) the enzymes produced by the virus before it infects the cell 19) Viral genomes vary greatly in size and may include from four genes to several hundred genes.19 Which of the following viral features is most apt to correlate with the size of the genome? A) glycoproteins of the envelope B) RNA versus DNA genome C) size of the viral capsomeres D) double versus single strand genomes E) size and shape of the capsid 20) 20) Which structure is not part of the endomembrane system? A) nuclear envelope B) plasma membrane C) Golgi apparatus D) chloroplast E) ERExplanation / Answer
14. The organelle in animals which helps in the packaging of hydrolytic enzymes are lysosomes.
Hence option (D) is correct.
15. The most common compound in the cell walls of gram positive bacteria are peptidoglycon.
Hence option (A) is correct.
16. Site of synthesis of proteins are ribosomes. They are present on the endoplasmic reticulum called rough endoplasmic reticulum.
Hence option (B) is correct.
20. Endomembrane system are a group of membrane networks in eukaryotic cells. They work together for packaging and transport of lipids and proteins. They include golgi apparatus, lysosomes, plasma membrane, vacuoles, nuclear envelope and endoplasmic reticulum. They don't include mitochondria and chloroplast.
Hence option (D) is correct
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