Answer the following statements true (T) or false (F)
1. The first and second laws of thermodynamics apply to nonliving systems like gasoline engines but do not apply to reactions in living cells.
2. Exergonic reactions do not require activation energy to get started.
3. Reduction is the gain of electrons by an atom or molecule.
4. An enzyme is a lipid that catalyzes chemical reactions.
5. When an end product of a reaction pathway is in excess and inhibits the first enzyme of the pathway, this is an example of positive feedback.
1.FALSE
The laws of thermodynamics apply to all physical and chemical reactions.
2.FALSE
All chemical and physical reactions require input to start the work of changing the system condition.
3.TRUE
The term itself refers to the reduction in charge (negative) as electrons are transferred.
4.FALSE
Most enzymes are polymers built of amino acid monomers, while some are built of nucleotides.
5.FALSE
Positive feedback would increase the speed or action in an enzyme-catalyzed reaction.
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The organ where you would most likely expect to find actin microfilaments continuous with adherens junctions is the
A) liver. B) stomach. C) kidney. D) brain. E) heart.
Humans have more DNA and more genes than any other organism
Indicate whether the statement is true or false
Serum is plasma without the proteins involved in clotting
____________________ Indicate whether the statement is true or false.