Biology quiz part two

The mathematical expression for the change in free energy of system is ∆G=∆H-T∆S. Which of the following is correct

G is the change in free energy

which of the following is true for anabolic pathways

they consume energy to build up polymers from monomers

What was the substrate used in the enzyme catalysis lab?

PNPP

What is the name of the functional group that was cleaved?

Phosphate

Which of the following statements is true concerning catabolic pathways

They supply energy thats released during catabolic reactions, primarily in the form of ATP, for the cell work

Reactants capable of interacting to form products in a chemical reaction must first overcome a thermodynamic barrier know as the reactions

activation energy

Identify the enzymes that you used in the Enzyme catalysis lab

alkaline phosphatase

How does a noncompetitive inhibitor decrease the rate of an enzyme reaction

by changing the shape of the enzymes active site

How might an amino acid change at a site distant from the active site of the enzymes alter the enzymes substrate specificity

by changing the shape of the protein

A system at chemical equilibrium

can do no work

which term most precisely describes the cellular process of breaking down large molecules into smaller ones

catabolism

which of the following is a statement of the first of thermodynamics

energy cannot be created or destroyed

Which of the following statements regarding enzymes is true

enzymes increase the rate of a reaction by lowering the activation energy barrier

choose the pair of terms that correctly completes this sentence: Catabolism is to anabolism as _____ is to_____

exergonic; endergonic

The mechanism in which the end product of a metabolic pathways inhibits an earlier step in the pathway in most precisely described as

feedback inhibition

If metabolism is the sum of all chemical reactions in an organism then having a low metabolism might indicate what about someone's enzymes and enzymatic activity in their body

if someone has low metabolism they might also have a lack of enzymes to perform chemical reactions as well as low enzymatic activity

If this is an enzymes catalyzed reaction how can the rate of reaction be increased beyond the maximum velocity in this figure

increase the amount of enzyme

the active site of an enzyme is the region that

is involved in the catalytic reaction of the enzyme

What is true about allosteric site

it can function as an on/off switch

which of the following is true of metabolism in its entirety in all organism

metabolism consists of all the energy transformation reactions in an organism

If the enzyme is added to a solution where its substrate and product are in equilibrium what will occur

nothing; the reaction will stay at equilibrium

For living organisms, which of the following is an important consequence of the first law of thermodynamics

the organism ultimately must obtain all of the necessary energy for life from its environment

What was the purpose of the lab and why do we care about enzymes?

the purpose was to observe how enzymes sped up the reaction and how inhibitors affected it, as well as the amount of light absorbed . Enzymes are used in almost every reaction that occurs in our bodies, its important to know how they affect us

Which of the following statements is true about enzymes catalyzed reactions

the reaction is faster than the same reaction in the absence of the enzymes