don\'t understand Cell Structure/Organelle Homework DUE DATE:-Tuesday ?-2S-R(beg
ID: 261320 • Letter: D
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Cell Structure/Organelle Homework DUE DATE:-Tuesday ?-2S-R(beginning of lab) You have been assigned two cell structures/organelles to lean more about in order to participate in a lal activity. During this activity, you will share the following information with other students in the class, essentially teaching them what you have learned, so it's really important that you prepare the answers to the following questions! Use chapters 6 and 27 in your text as your information source. Other resources may be acceptable, but you are responsible for verifying the accuracy of the information. endospofetracellwler matrix 1. Assigned cell structures/organelles 2. Are these considered TRUE organelles or "just" cell structures? 3. Your structures/organelles are made of which of the following biological macromolecules (answer all Just cl structur that apply: protein, nucleic acid, lipid, polysaccharide)? 4. What is/are the function(s) of your structures/organelles? 5. Your structures/organelles is/are associated with which cell types? Use these answer choices eukaryotic (plant), eukaryotic (animal), prokaryotic.Explanation / Answer
Ans;
1. Assigned cell structures/ organells endospore and extra cellular matrix.
2. They are just cell structures.
3. A.Endospore: Proteins and peptidoglycons
Having Exosporium: Enclose spore coat consists of proteins rice in Cys and hydrophobic amino acids.
Spore coat: Made up of proteins
Spore wall: made up of with complex peptido glycans which enclose the core.
Core: Consists of DNA,RNA, SSAP (Small soluble acidic proteins) and Ca2+ dipicolinate.
B. Extra cellular matrix (ECM): composed with glycosaminoglycans and observed an interlocking mesh which made with fibrous proteins. Also contains Nonproteo glycan polysaccharides.
Glycosaminoglycans: Polymers of carbohydrates and attached to the matrix proteins like Hyaluronic acid.
Also rich in collagen, which is most abundant protein in human body.
4. a) Endospore: Discovered by Cohn. It is produced by gram +ve bacteria. eg: bacillus, Clostridium. protect the cell from unfavourable conditions by increasing resistance.
When the cell exposed to an unfavorable condition, inside the cell spore is formed. Spore size is larger than cell and gives drumstick appearance. It protects the cell by showing the resistance to 100o C because of the presence of Ca2+. Also resistance for UV radiation because spore contains A form of DNA. Resistant to dry condition also.
B) ECM: It performed the different functions, like providing the support, regulating intracellular communications and segregation of tissues from one another. It stores the growth factors and determines the cellular dynamics. Also triggers the protease activity under physiological variations. Differentiation and gene expression also occurred in ECM due to its elastic nature.
5. Endospore: Is associated with prokaryotes. Especially with Gram+ve bacteria.
ECM: Associated with eukaryotic cells of both animal and plant cells.
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