In transmission electron microscopy, the specimen is placed on a

a) copper mesh grid.
b) glass slide.
c) plastic slide.
d) magnesium mesh grid.


Ans: a) copper mesh grid.

Biology & Microbiology

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The genetic code is expressed differently in bacterial and archaeal cells than in eukaryotic cells.

Answer the following statement true (T) or false (F)

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The ciliary muscle of the eye changes the shape of the _______

Fill in the blank(s) with correct word

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Mesoderm gives rise to

A. epidermis. B. digestive tract. C. respiratory tube. D. peripheral nervous system. E. skeletal muscle.

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In a simplified version of hair color determination for humans, there is one gene locus that can have two alleles, dominant brown (B) and recessive blond (b). There is another recessively epistatic gene locus (E/e) on a different chromosome that will create red hair regardless of the first gene's genotype. If a red-haired child is born to 2 brown haired parents, what are the genotype(s) of the parents?

a) Both must be B_Ee b) One must be B_Ee and the other could be B_EE c) One must be B_Ee and the other could be B_ee d) Both must be B_ee

Biology & Microbiology