Concept explainers
To determine:
The functions of capsids, nucleocapsids, envelops and spikes.
Introduction:
Viruses are much smaller and simpler than prokaryotic cells and are responsible for some of the most virulent as well as common diseases on Earth. They cannot be seen by ordinary microscopes and are not considered to be alive until they enter a host cell. They comprise of a core of
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Foundations in Microbiology
- Which of the following is not associated with eukaryotic cells? a) Nucleoli. b) Plastids. c) Plasmids. d) Plasmodesmata. e) Basal bodies. Which paired items are structurally identical to one another? a) Eukaryotic and prokaryotic ribosomes. b) Centrioles and basal bodies. c) Plastids and mitochondria. d) Eukaryotic and prokaryotic flagella. Which statement is not true? a) Plant cells are eukaryotic. b) Cholorplasts are typically found in the roots of plants. c) Plasmodesmata allow plant cells to share cytoplasm with one another facilitating movement of materials from one cell to another. d) Endoplasmic reticula and golgi complexes work together in the secretion of products from a cell. Which structure is not found in plant cells? a) Mitochondria. b) Plastids. c) Centrioles. d) Golgi bodies. e) Mark e if all are found in plant cells. Which of the following is not found in animal cells? a) Mitochondria. b)…arrow_forwardDescribe the structure and function of six different structures found on the exterior of a bacterial cell.arrow_forwardDraw a diagram of a bacterial cell. Label and explain the function of each of the following components: nucleoid, plasmid, cell wall, pili, and flagella.arrow_forward
- Indicate whether the following structures occur in Bacteria, Eukarya or both. Also indicate one function for the structure. 1 ) Ribosomes2) Nucleus3) Cell wall4) Flagella5) Fimbriaearrow_forwardDraw the structure of sycon?arrow_forwardCompare the structure of a trypanosome and a euglenid.arrow_forward
- For a bacterial genome the structure genes typically refers to genes that a)encodes protein product b) encodes cell wall structure c) encodes dna structure and d) encodes endosporearrow_forwardWhat is the function of the plasmalemma and pellicle in euglenid cells? How are these structures similar to the bacterial cell wall?arrow_forwardDescribe conjugation as it occurs in ciliates. What is the fate of the micronucleus and the macronucleus during this process?arrow_forward
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