Frage 1
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During the Benedict's test for [blank_start]reducing[blank_end] sugars, copper(II) [blank_start]sulphate[blank_end] goes to copper(I) [blank_start]oxide[blank_end] and forms a [blank_start]red[blank_end] precipitate.
Antworten
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reducing
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sulphate
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oxide
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red
Frage 2
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Maltose is formed from [blank_start]2[blank_end] [blank_start]alpha[blank_end] glucose
Frage 3
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Sucrose is made from:
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Glucose + Glucose
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Glucose + Fructose
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Glucose + Galactose
Frage 4
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Glycogen is an [blank_start]energy[blank_end] source for [blank_start]animals[blank_end]. [blank_start]Starch[blank_end] is an energy source of plants. [blank_start]Celluose[blank_end] is a structural molecule for plants.
Antworten
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animals
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energy
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Starch
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Celluose
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water
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plants
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bacteria
Frage 5
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Starch has [blank_start]unbranched[blank_end] chains and has a [blank_start]helical[blank_end] structure which means it is compact. You test for starch with the [blank_start]iodine test[blank_end] which uses [blank_start]potassium iodide[blank_end] solution. A positive result is [blank_start]blue-black[blank_end].
Antworten
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unbranched
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branched
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helical
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linear
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iodine test
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emulsion test
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benedict's test
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potassium iodide
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ethanol
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blue-black
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red
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cloudy precipitate
Frage 6
Frage
Which is not a function of lipids:
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Waterproofing
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Insulating
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Structural support
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Protection
Frage 7
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Collagen is a globular protein.
Frage 8
Frage
Water molecules are polar.
Frage 9
Frage
Label this diagram of ATP
Antworten
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Adenoside
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Thymine
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Ribose
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Dyoxyribose
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Phosphate
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Calcium
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Hydrogen
Frage 10
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What type of enzyme inhibition is this?
Frage 11
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What type of enzyme inhibition is this?
Frage 12
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In DNA, the [blank_start]purine[blank_end] bases are adenine and guanine, and the [blank_start]pyrimidine[blank_end] bases are thymine and cytosine.
Frage 13
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DNA replicates conservatively.
Frage 14
Frage
Label this diagram of a DNA nucleotide.
Antworten
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Phosphate
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Deoxyribose Sugar
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Base
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Phosphate
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Deoxyribose sugar
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Base
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Phosphate
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Deoxyribose sugar
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Base
Frage 15
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Which stage of mitosis is this?
Frage 16
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Which stage of mitosis is this?
Frage 17
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Label these organelles
Frage 18
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Active transport is the movement of molecules or ions in or out of a cell from a region on [blank_start]lower[blank_end] concentration to a region of [blank_start]higher[blank_end] concentration using ATP and [blank_start]carrier[blank_end] proteins.
Frage 19
Frage
Which is not a physical barrier to pathogens
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Skin
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Mucous membranes
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White blood cells
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Gut flora
Frage 20
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Phagocytes are specific.
Frage 21
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The [blank_start]Cellular[blank_end] Immune Response:
1) Phagocyte becomes an [blank_start]antigen presenting cell[blank_end] after it has destroyed the pathogen
2) The antigen presenting cell releases cytokines and the helper [blank_start]T[blank_end] cell is activated
3) The helper T cell stimulates the production of [blank_start]cytotoxic[blank_end] T cells
4) Perforin is produced which cause [blank_start]lysis[blank_end] of the cells infected with pathogens
5) Exposure to the specific antigen causes [blank_start]memory[blank_end] cells to be produced
Antworten
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lysis
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memory
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antigen presenting cell
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Cellular
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cytotoxic
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T
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B
Frage 22
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[blank_start]Humoral[blank_end] Immune Response:
1) The phagocyte becomes an [blank_start]antigen presenting cell[blank_end] after it destroys the pathogen
2) The antigen presenting cell stimulates the helper T cell by releasing [blank_start]cytokines[blank_end]
3) The helper T cell stimulates the differentiation of [blank_start]B lymphocytes[blank_end]
4) Some B lymphocytes become [blank_start]plasma[blank_end] cells which release large quantities of specific [blank_start]antibodies[blank_end]
5) Some B lymphoctes become [blank_start]memory[blank_end] cells
Antworten
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Humoral
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antigen presenting cell
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cytokines
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B lymphocytes
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plasma
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antibodies
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memory
Frage 23
Frage
Select the statements that are true about Passive immunity
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No memory cells formed
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Introduction of antibodies from an outside source
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Generaly long lasting
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No direct contact with the pathogen required
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Bodies own immune system is stimulated
Frage 24
Frage
Select the statements that are true about Active immunity.
Antworten
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Bodies own immune system is stimulated to produce antibodies
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There are 2 types - natural and artificial
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Antibodies come from an outside source
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Long lasting immunity
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Short lasting immunity
Frage 25
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In fish, the blood and water flow in [blank_start]opposite[blank_end] directions. This is called [blank_start]countercurrent[blank_end] flow. This means a diffusion gradient is maintained all the way along the gill lamellae so almost all the oxygen diffuses out of the [blank_start]water[blank_end] into the [blank_start]blood[blank_end].
Antworten
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opposite
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countercurrent
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water
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blood
Frage 26
Frage
Label this diagram of the lungs
Antworten
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Trachea
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C-shaped cartilidge
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Bronchi
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Bronchioles
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Alveoli
Frage 27
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Which are not adaptations of the alveoli:
Frage 28
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A high affinity for oxygen in haemoglobin means that the haemoglobin takes up O2 less easily at lower partial pressures of O2.
Frage 29
Frage
Label this diagram of the heart.
Antworten
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Aorta
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Vena Cava
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Pulmonary artery
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Pulmonary vein
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LEFT
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RIGHT
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Left atrium
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Right atrium
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Right ventricle
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Left ventricle
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Pulmonary valve
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Atrioventricular valve
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Aortic valve
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Apex
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Coronary artery
Frage 30
Frage
Arteries have a [blank_start]thick[blank_end] muscular layer which can be constricted and dilated to control the volume of blood passing through them. They have a thick [blank_start]elastic[blank_end] layer which helps to maintain blood pressure by stretching and [blank_start]recoiling[blank_end]. The overall thickness of the artery help to prevent [blank_start]bursting[blank_end]. There are no [blank_start]valves[blank_end].
Antworten
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thick
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thin
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elastic
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recoiling
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bursting
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valves
Frage 31
Frage
Veins have a [blank_start]thin[blank_end] muscular layer which can [blank_start]constrict[blank_end] to control the flow of blood. They have a thin elastic layer. They have very thin walls since the pressure is [blank_start]lower[blank_end] and means they can be flattened easily to aid the flow of blood. There are valves throughout which ensure the blood doesn't flow [blank_start]backwards[blank_end].
Antworten
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thin
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thick
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constrict
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lower
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higher
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backwards
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forwards
Frage 32
Frage
Splicing removes the introns from pre-mRNA.
Frage 33
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The region of tRNA that is complementary to a codon on mRNA is called an [blank_start]anti-codon[blank_end].
Frage 34
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During meiosis, the chromosome number [blank_start]halves[blank_end] and [blank_start]4[blank_end] haploid cells are are genetically [blank_start]different[blank_end] are produced.
Frage 35
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Crossing over occurs during meiosis [blank_start]1[blank_end]
Frage 36
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Mutagenic agents increase the [blank_start]rate[blank_end] of mutations.
Frage 37
Frage
What is the amino acid sequence for this sequence of mRNA
UUC AGC GCG UAA
Antworten
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Alanine, Serine, Alanine, Stop codon
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Alanine, Arginine, Alanine, Stop codon
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Leucine, Arginine, Alanine, Tyrosine
Frage 38
Frage
A genetic bottleneck will [blank_start]reduce[blank_end] genetic diversity. It is an event which causes a big [blank_start]reduction[blank_end] in the population so will reduce the number of [blank_start]alleles[blank_end]. The survivors will reprodue and the larger population is created from [blank_start]a few[blank_end] indiviuals.
Antworten
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reduce
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increase
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reduction
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rise
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alleles
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a few
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many
Frage 39
Frage
Directional selection favours individuals with characteristics at the [blank_start]extremes[blank_end] of the population whereas stabilising selection favours individuals in the [blank_start]middle[blank_end] of the range when the environment [blank_start]isn't[blank_end] changing much.
Frage 40
Frage
Complete the table for the species: Ceyx azureus
Antworten
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Kingdom
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Phylum
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Class
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Order
-
Family
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Ceyx
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azureus