Between which individuals would an organ transplant have the least chance of rejection?

1.siblings
2.fraternal twins
3.identical twins
4.mother and child


3

Biology & Microbiology

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Which of the following statements is NOT true of Gram-positive bacteria?

A. They have a thicker peptidoglycan layer than do Gram-negative bacteria. B. They turn purple when subjected to the Gram-staining process whereas Gram-negative bacteria stain pink. C. They lack the lipopolysaccharides that Gram-negative bacteria have. D. They are less resistant to antibiotics than Gram-negative bacteria. E. They have a gram molecular weight of more than 1.0 whereas Gram-negative bacteria have a gram molecular weight of less than 1.0.

Biology & Microbiology

The ozone layer is valuable because it blocks

a. heat. b. UV radiation. c. radio waves. d. asteroids. e. X-rays.

Biology & Microbiology

A magnesium ion contains twelve protons and ten electrons. A chloride ion contains seventeen protons and eighteen electrons. Given this information, the chemical formula for magnesium chloride is 

A. MgCl. B. Mg2Cl. C. MgCl2. D. Mg2Cl2.

Biology & Microbiology

Activity of CDKs is mediated by:

a. cyclins b. checkpoints c. growth factors d. nuclear lamins e. receptors

Biology & Microbiology