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Tutor profile: Belma A.

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Belma A.
Master of Science in Applied Biotechnology
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Questions

Subject: Natural Sciences

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Question:

What was the Cambrian explosion?

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Belma A.
Answer:

A period of time that included the movement of life from water to life on land as well as period of time that marked the beginning of the Phanerozoic eon and a period of time that saw a huge increase in the number and diversity of life.

Subject: Biochemistry

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Question:

Glycogen and cellulose are both polymers of glucose. List two major differences between their chemical structures and explain how each is important to their primary roles as structural or storage molecules in biology

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Belma A.
Answer:

Glycogen (amylose) has α(1-4) linkages between glucose monomers. Cellulose has β(1-4) linkages. Cellulose adopts long linear fibers due to the geometry of its linkages. Hydrogen bonding between these leads to very strong fibers for its structural role. Glycogen adopts a helical structure due to its linkage geometry that does not form this interstrand hydrogen bonding. Thus, it is more soluble. Glycogen is branched with α(1-6) linkages. Cellulose is linear. The branches in glycogen lead to many non-reducing ends for enzymes that add or remove glucose to work on, making it easier to mobilize energy from this storage molecule. It is much more difficult to break down cellulose.

Subject: Biology

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Question:

What is central dogma?

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Belma A.
Answer:

Central dogma is used to explain two/step process of information flow within the cell that starts with DNA -->RNA---> protein. The processes are called transcription (DNA -->RNA) and translation (RNA---> protein)

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