Questão 1
Questão
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.
Responda
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reducing
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sulphate
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oxide
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red
Questão 2
Questão
Maltose is formed from [blank_start]2[blank_end] [blank_start]alpha[blank_end] glucose
Questão 3
Questão
Sucrose is made from:
Responda
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Glucose + Glucose
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Glucose + Fructose
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Glucose + Galactose
Questão 4
Questão
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.
Responda
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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
Questão 5
Questão
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].
Responda
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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
Questão 6
Questão
Which is not a function of lipids:
Responda
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Waterproofing
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Insulating
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Structural support
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Protection
Questão 7
Questão
Collagen is a globular protein.
Questão 8
Questão
Water molecules are polar.
Questão 9
Questão
Label this diagram of ATP
Responda
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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
Questão 10
Questão
What type of enzyme inhibition is this?
Questão 11
Questão
What type of enzyme inhibition is this?
Questão 12
Questão
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.
Questão 13
Questão
DNA replicates conservatively.
Questão 14
Questão
Label this diagram of a DNA nucleotide.
Responda
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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
Questão 15
Questão
Which stage of mitosis is this?
Questão 16
Questão
Which stage of mitosis is this?
Questão 17
Questão
Label these organelles
Questão 18
Questão
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.
Questão 19
Questão
Which is not a physical barrier to pathogens
Responda
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Skin
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Mucous membranes
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White blood cells
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Gut flora
Questão 20
Questão
Phagocytes are specific.
Questão 21
Questão
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
Responda
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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
Questão 22
Questão
[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
Responda
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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
Questão 23
Questão
Select the statements that are true about Passive immunity
Responda
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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
Questão 24
Questão
Select the statements that are true about Active immunity.
Responda
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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
Questão 25
Questão
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].
Responda
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opposite
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countercurrent
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water
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blood
Questão 26
Questão
Label this diagram of the lungs
Responda
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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
Questão 27
Questão
Which are not adaptations of the alveoli:
Questão 28
Questão
A high affinity for oxygen in haemoglobin means that the haemoglobin takes up O2 less easily at lower partial pressures of O2.
Questão 29
Questão
Label this diagram of the heart.
Responda
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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
Questão 30
Questão
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].
Responda
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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
Questão 31
Questão
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].
Responda
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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
Questão 32
Questão
Splicing removes the introns from pre-mRNA.
Questão 33
Questão
The region of tRNA that is complementary to a codon on mRNA is called an [blank_start]anti-codon[blank_end].
Questão 34
Questão
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.
Questão 35
Questão
Crossing over occurs during meiosis [blank_start]1[blank_end]
Questão 36
Questão
Mutagenic agents increase the [blank_start]rate[blank_end] of mutations.
Questão 37
Questão
What is the amino acid sequence for this sequence of mRNA
UUC AGC GCG UAA
Responda
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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
Questão 38
Questão
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.
Responda
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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
Questão 39
Questão
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.
Questão 40
Questão
Complete the table for the species: Ceyx azureus
Responda
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Kingdom
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Phylum
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Class
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Order
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Family
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Ceyx
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azureus