Questão 1
Questão
Surface tension is caused by [blank_start]cohesive[blank_end] hydrogen bonding which resists the penetrating of its surface.
Questão 2
Questão
[blank_start]Hydrophilic[blank_end] is a term used to describe substances that are chemically attracted to water.
[blank_start]Hydrophobic[blank_end] is a term used to describe substances that are insoluble in water.
Questão 3
Questão
All [blank_start]lipids[blank_end] are hydrophobic.
Questão 4
Questão
Which of the following statements are true?
Responda
-
An anabolic reaction is the building up of large molecules
-
A catabolic reaction is the building up of large molecules
-
An anabolic reaction is the breaking down of large molecules
-
A catabolic reaction is the breaking down of large molecules
-
Exergonic reactions release energy
-
Endergonic reactions release energy
-
Exergonic reactions require energy
-
Endergonic reactions require energy
Questão 5
Questão
Anabolism + Catabolism = [blank_start]Metabolism[blank_end]
Questão 6
Questão
Carbohydrates are made up of [blank_start]carbon, hydrogen and oxygen[blank_end]
Questão 7
Questão
glucose is a sugar and a [blank_start]mono[blank_end]saccharide.
Questão 8
Questão
Solvent + [blank_start]Solute[blank_end] = Solution
Questão 9
Questão
The [blank_start]polar[blank_end] attraction of [blank_start]large[blank_end] quantities of water molecules can interrupt [blank_start]intramolecular[blank_end] [blank_start]forces[blank_end] and result in the [blank_start]dissociation[blank_end] of the [blank_start]atoms[blank_end].
Responda
-
polar
-
non-polar
-
large
-
small
-
intramolecular
-
forces
-
waves
-
hydrophilic
-
hydrophobic
-
dissociation
-
atoms
-
molecules
Questão 10
Questão
Water dissolves nutrients, gases and waste products making it a good [blank_start]solvent[blank_end].
Questão 11
Questão
Which of the following saccharides are disaccharides?
Responda
-
Glucose
-
Galactose
-
Fructose
-
Sucrose
-
Lactose
-
Maltose
-
Glycogen
-
Starch
-
Cellulose
Questão 12
Questão
Drag and drop the correct functions and uses to the correct -saccharides.
Glucose: [blank_start]Quickly absorbed and used in respiration[blank_end]
Galactose: [blank_start]an energy molecule[blank_end]
Fructose: [blank_start]transporting sugar[blank_end]
Lactose: [blank_start]is quickly digested[blank_end] and found in milk
Maltose: broken down by starch and is [blank_start]a quick store of energy[blank_end]
Glycogen: Insoluble storage of glucose in the liver, [blank_start]produced using insulin[blank_end]
Starch: [blank_start]Longterm energy store[blank_end]
Cellulose: [blank_start]Structural unit in plant cell walls[blank_end]
Questão 13
Questão
Non-competitive inhibitors are not influenced by the [blank_start]concentration[blank_end] of the substrate. They bind irreversibly the the enzyme.
Questão 14
Questão
Non-competitve inhibitors need to bind at the active site of an enzyme to work.
Questão 15
Questão
The [blank_start]end[blank_end] product of respiration is ATP.
Questão 16
Questão
Which of the following statements about ATP is false?
Responda
-
When respiration slows down more ATP is produced.
-
As ATP is used up the inhibition stops and the reaction speeds up again.
-
ATP slows down reactions considerably.
Questão 17
Questão
How many sites does an inhibitor molecue have?
[blank_start]__[blank_end]
Questão 18
Questão
When an inhibitor is present it fits into the [blank_start]allosteric[blank_end] site of an enzyme. This causes a [blank_start]conformational[blank_end] change in the enzyme's molecular shape so that the [blank_start]active[blank_end] site of the substrate changes. This causes the substrate to no longer be able to bind with the enzyme.
Responda
-
allosteric
-
conformational
-
active
Questão 19
Questão
How is the negative feedback loop achieved with inhibitors?
Start the loop at the upper left side with: 'The reaction slows down'
Responda
-
The reaction slows down
-
The inhibitor concentration diminishes
-
The enzyme's concentration diminishes
-
enzyme's shape changes to active form
-
The reaction speeds up
-
The inhibitor molecule is released
Questão 20
Questão
Sort the following statements into competitive and non-competitive inhibitors.
Competitive
- Increasing the inhibitor concentration [blank_start]increases the effect[blank_end]
- Competes with the [blank_start]substrate[blank_end] at the active site
- Active site [blank_start]remains the same[blank_end]
Non-Competitive
- Increasing the inhibitor concentration [blank_start]doesn't influence the effect[blank_end]
- Inhibitor [blank_start]does not bind[blank_end] at the active site
- Active site [blank_start]may change shape[blank_end]
Questão 21
Questão
Label this chlamydomona
Responda
-
flagella
-
Chloroplast
-
nucleus
-
starch
-
mitochondrion
-
golgi body
-
cell wall
Questão 22
Questão
Label the Eschericha coli
Responda
-
circular DNA
-
plasmid
-
pili
-
ribosome
-
membrane
-
cell wall
Questão 23
Questão
Differentiation is a process that occurs in the cells of [blank_start]multi[blank_end]cellular organisms.
Questão 24
Questão
Match the stem cells with their functions.
Totipotent - Can differentiate [blank_start]into any type of cell[blank_end]
Pluripotent - Can differentiate [blank_start]into many types of cells[blank_end]
Multipotent - Can differentiate [blank_start]into a few closely-related types of cell[blank_end]
Uni-potent - Can differentiate [blank_start]only it's own type[blank_end]
Questão 25
Questão
Label the following 2D fluid mosaic model.
Responda
-
integral proteins
-
channel protein
-
Carrier protein
-
peripheral protein
-
phospholipid
-
glycoprotein
Questão 26
Questão
Match the following with their correct functions.
[blank_start]Channel protein[blank_end]: for passage through the membrane
[blank_start]Pump protein[blank_end]: for [blank_start]active transport[blank_end] across the membrane. (using energy from ATP)
Electron carrier proteins: a chain of [blank_start]peripheral and integral[blank_end] proteins that allow electrons to pass through the [blank_start]membrane[blank_end]
Enzymes held in the membrane: [blank_start]catalyze[blank_end] reactions at the surface of the membrane. (within or outside of the cell)
[blank_start]Active site[blank_end]: the substrate molecule fits here and the reaction then occurs
Binding protein for attachment of a specific [blank_start]hormone[blank_end]: a signal is then generated that is transmitted inside the cell
cell-cell recognition site: - attachment may result in cells [blank_start]binding[blank_end] together
[blank_start]binding sites[blank_end]: for antigen-[blank_start]antibody[blank_end] reaction
Responda
-
Channel protein
-
Pump protein
-
catalyze
-
Active site
-
binding
-
binding sites
-
antibody
-
hormone
-
peripheral and integral
-
membrane
-
active transport
-
diffusion
-
osmosis
Questão 27
Questão
Two amino acids undergo a condensation reaction to form a [blank_start]Di-Peptide[blank_end] bond.
Questão 28
Questão
Many different amino acids linked together by peptide bonds is called a [blank_start]polypeptide[blank_end].
Questão 29
Questão
Different amino acid sequuences will fold into different configurations due to the chemical properties of the [blank_start]R-groups[blank_end].
Questão 30
Questão
Proteins that consist of more than one polypeptide chain linked together are known as having a [blank_start]quaternary[blank_end] structure.
Questão 31
Questão
Meiosis Steps:
1. [blank_start]Metaphase I[blank_end] -- [blank_start]homologous chromosomes line up[blank_end]
2. [blank_start]Anaphase I[blank_end] -- [blank_start]spindle fibers pull pairs[blank_end]
3. [blank_start]Telophase II[blank_end] -- [blank_start]4 haploid (N) cells form[blank_end]
4. Interphase -- [blank_start]DNA replication occurs[blank_end]
5. [blank_start]Anaphase II[blank_end] -- [blank_start]sister chromatids separate[blank_end]
6. [blank_start]Telophase I[blank_end] -- [blank_start]2 haploid calls form[blank_end]
7. [blank_start]Metaphase I[blank_end] --- [blank_start]spindle fibre attach to pairs[blank_end]
8. [blank_start]Anaphase II[blank_end] -- [blank_start]chromatids move to ends of cell[blank_end]
9. [blank_start]Prophase I[blank_end] -- [blank_start]crossing over (if any) occurs[blank_end]
Responda
-
Prophase I
-
Metaphase I
-
Anaphase I
-
Telophase I
-
Prophase II
-
Metaphase II
-
Anaphase II
-
Telophase II
-
crossing over occcurs
-
homologous chromosomes line up
-
cytoplasm divides
-
new spindles form
-
chromosomes line up (again)
-
chromatids move to poles
-
nuclear envelope forms around each set
-
cytoplasm divides again
-
chromosomes go to poles
Questão 32
Questão
What is a nucleosome?
Responda
-
A region in a prokaryotic cell where DNA is found
-
A DNA molecule wrapped around histone proteins
-
A ribosome of a prokaryotic cell
-
A molecule consisting of a sugar, a base and a phosphate