Worksheetstest
Total questions: 59
Worksheet time: 50mins
1. Which is not true about enzymes?
Without enzymes, all chemical reactions would not take place.
Enzymes is a biological process
Enzymes act as catalyst
1. The following is a deficiency of enzymes?
c.
albinism
phenylketonuria
cancer
both a and b
1. Which of the following is not true about Phenylketonuria ?
also called PKU
Inherited disease
Caused by mutation
1. What are enzymes mainly composed of?
Carbohydrates
fats
proteins
nucleic acid
1. What are examples of enzymes?
pepsin
amylase
both a and b
none of these
1. What factors affect enzyme activity except?
Temperature
pH
concentration
all of the above
1. Which statement is not true about active site?
an enzyme where a substrate binds and catalysis takes place or where chemical reaction occurs.
is a structural element of protein that determines whether the protein is functional when undergoing a reaction from an enzyme.
is a region on a protein, DNA or RNA, to which a ligand can bind.
The active site is a three-dimensional cleft produced by groups from various amino acid sequences.
1. Which of the statements regarding enzymes is false?
a. c.
b. d.
Enzymes are proteins
Enzymes provide activation energy for reaction
Enzymes are specific
Enzyme activity can be regulated
1. The part of the enzyme where the substrate binds is called the:
Active site
catalyst
inhibitors
large subunit
1. Some people cannot digest milk products because they lack a specific enzyme. Which enzyme would be used to break down the lactose in milk?
Hydroxylase
maltase
amylase
lactase
1. With what 3 letters do enzymes typically end?
-ose
-ase
-ses
-tic
1. Any substance that is acted upon by an enzymes is called a
Coenzyme
substrate
vitamin
polypeptide
1. What is the function of an Enzymes
Break themselves into small pieces
Speed up chemical reaction
slow down chemical reaction
. combine products to form reactants
1. Any substance that is acted upon by an enzymes is called a
Coenzyme
substrate
vitamin
polypeptide
1. Which is not true?
Enzymes speed up chemical reaction
enzymes react best at specific temperature
Enzymes only control one type of reaction
enzymes are made of fatty
1. After the enzyme and substrate bind together and perform the reaction, what does the substrate become?
Asubstrate
enzymes
products
inhibitors
1. What is inhibitor?
The region of an enzymes that attaches to a substrate
A change in the shape of proteins
Substance that can bind to an enzyme, prevent the substrate from binding
macromolecules that contain carbon, hydrogen, oxygen and nitrogen
1. What part do the competitive inhibitors attached to?
Substrate
What part do the competitive inhibitors attached to?
active site c. somewhere other than enzyme
both a and b
1. What are vitamins and minerals?
Part of our food, give us energy
activators
inhibitors
enzymes
1. are usually secreted from the endocrine system and released into the bloodstream, but they act on distant target cells.
(a)
is a chemical that carries messages between nerve cells in the brain and throughout your body.
(a)
Low levels of dopamine have been linked to what disease
(a)
Those billions of brain cells communicate by passing chemical messages at the synapse, the small gap between cells, in a process called
(a)
1. is the chief neurotransmitter of the parasympathetic nervous system
(a)
1. is the principal excitatory neurotransmitter of the central nervous system and the most abundant neurotransmitter in the brain
(a)
refer to the points of contact between neurons where information is passed from one neuron to the next.
(a)
(a) It plays a role as a “reward center” and in many body functions, including memory, movement, motivation, mood, attention
long-term mental disorder of a type involving a breakdown in the relation between thought, emotion, and behavior, leading to faulty perception
(a)
1. Gland stimulate the calcium level of the bone
(a)
1. is a signaling molecule secreted by a neuron to affect another cell across a synapse.
(a)
is an inhibitory neurotransmitter. It lessens a nerve cell’s ability to receive, create or send chemical messages to other nerve cells.
(a)
Acetylcholine has been implicated in both the pathophysiology and treatment of a number of psychiatric disorders, with most of the data related to its role and therapeutic potential focusing on
(a)
The most common cause of acute histamine toxicity is the result
(a)
Hormones regulates metabolism
(a)
A chemical made by some nerve cells and in the adrenal gland
(a)
a compound which is released by cells in response to injury and in allergic and inflammatory reactions, causing contraction of smooth muscle and dilation of capillaries
(a)
1. Hormones secreted by Adrenal glands
(a)
1. Excessive accumulation of (a) at the neuromuscular junctions and synapses causes symptoms of both muscarinic and nicotinic toxicity.
Gland secretes growth hormones
(a)
Complete name of your biochemistry teacher( with middle initial)
(a)
Glycolysis happens in
(a)
Electron transport chain happens in
(a)
Kreb cycle happens in
(a)
Reactant used in glycolysis
(a)
Reactant used in Kreb cycle
(a)
Reactant used in electron transport chain
(a)
Reactant used in pay-off stage in glycolysis
(a)
Product/s of glycolysis
(a)
Product/s of electron transport chain
(a)
Product/s of citric acid cycle
(a)
1. is a series of compounds in a chain transferring electron from one to the other through redox reactions.
(a)
1. the process in which glucose is broken down to produce energy.
(a)
is a process in which the carboxyl group is removed from a compound along with the release of carbon dioxide
(a)
1. produced by proton pumping during the electron transport chain is used to synthesize ATP.
(a)
1. the process of adding a phosphate group to a molecule derived from ATP
(a)
remove electron pairs from glucose transfer them to small molecules called electron carriers.
(a)
1. the main source of energy for cells and an important part of aerobic respiration.
(a)
1. It protects efficiently not only membrane phospholipids from peroxidation but also mitochondrial DNA and membrane proteins from free-radical-induced oxidative damage.
(a)
1. occurs 4 times as follows: Isocitrate to alpha-ketoglutarate (NADH is formed) alpha-ketoglutarate to succinyl co-A (NADH is formed) Succinate to Fumarate
(a)
