Term
| 3 things that happen to pre-mRNA molecule inside the nucleus before it can leave as mRNA |
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Definition
1. introns are excised
2. 7Methyl-G cap is added
3. Poly-A tail is added |
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Term
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Definition
G1, S, and G2
("M" phase is simply mitosis, and is therefore not involved in Interphase) |
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Term
| phases of Mitosis and major event thereof |
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Definition
Prophase: condensation of DNA into chromosomes
Metaphase: chromosomes are lined up on metaphase plate by microtubules
Anaphase: chromosomes are pulled apart to either pole of the now-elongated cell
Telophase: nuclear membrane is reconstructed
(PMAT) |
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Term
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Definition
| division of cytoplasm and constituent organelles. Timing depends on cell type. |
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Term
| Direction NEW DNA strands are BUILT |
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Definition
| 5' --> 3'. Nucleotides can ONLY be added to the 3' side of pre-existing nucleotides. |
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Term
| Direction SENSE STRAND of DNA is READ by DNA polymerase |
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Definition
| 3' --> 5'. Polymerase runs along template in this direction only. Cause for the need of Okazaki fragments. |
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Term
| A woman has a recessive mutant gene on one X chromosome: (X')(X) and a man has the same mutation on his X: (X')(Y). Do either or both of them display the phenotype of the mutation? If so, which? |
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Definition
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Term
| 4 cell types of epidermis |
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Definition
Melanocytes, Langerhans cells, Keratinocytes, Merkel cells
(MeLKeM) |
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Term
Keratinocytes
(function and location) |
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Definition
produce keratin (protection)
stratum spinosum (dominant) |
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Term
Melanocytes
(function and location) |
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Definition
produce pigment melanin (absorbs UV)
stratum spinosum, adjacent to stratum basale |
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Term
Langerhans cells
(function and location) |
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Definition
participate in immune response (derived from bone marrow)
stratum spinosum (sparse) |
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Term
Merkel cells
(function and location) |
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Definition
contacts tactile disc (touch sensation)
stratum basale |
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Term
| layers of epidermis from most superficial to deepest |
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Definition
corneum
(lucidum)
granulosum
spinosum
basale |
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Term
| Three major functions of the skin |
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Definition
1.Vitamin D production
2.Excretion
3.Protection
(PED) |
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Term
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Definition
Asymmetry
Borders (irregular)
Color (off)
Diameter (large) |
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