Which of the following is the most correct interpretation of the figure?
A) Inorganic phosphate is created from organic phosphate.
B) Energy from catabolism can be used directly for performing cellular work.
C) ADP + i are a set of molecules that store energy for catabolism.
D) ATP is a molecule that acts as an intermediary to store energy for cellular work.
E) i acts as a shuttle molecule to move energy from ATP to ADP.
Answer: D
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Match the following items with the correct phrases.
_______1. Immune complex reactions; antigen-antibody complexes become deposited in tissue (e.g., the glomeruli of the kidneys), resulting in inflammatory damage. _______2. Anaphylactic reactions; examples include hayfever symptoms, hives, asthma, and the anaphylactic shock that could follow a bee sting or administration of penicillin. _______3. Cell-mediated reactions; antibodies don't play a major role. _______4. Cytotoxic reactions; involve the lysis of cells; the adverse reactions that follow incompatible blood transfusions are an example. a. type I hypersensitivity reactions b. type II hypersensitivity reactions c. type III hypersensitivity reactions d. type IV hypersensitivity reactions
In eukaryotes, gene amplification is tolerated well when the amplified gene encodes for RNA products. However, it is rare or detrimental when the product is a protein. Why would it be advantageous for the cell to amplify the RNA-producing genes and not the protein-producing ones?
A) It allows for the manufacture of many RNA molecules when needed in the cell. B) Proteins are amplified from a single mRNA molecule. C) More RNA than protein is needed by the cell. D) RNAs are amplified from a single protein molecule. E) both choices A and B
Chitinases are examples of ____
a. systemins b. phytoalexins c. PR proteins d. R genes e. heat-shock proteins
The repeating units of muscle contraction are called myofibrils
____________________ Indicate whether the statement is true or false.