Biomolecules
Cells
Membranes
HL Only
Paparazzi
100
Name the intermolecular force occuring between water molecules.
Hydrogen Bonds
100
What structures are common to cells in all livings things?
Genetic material
Plasma membrane
Cytoplasm
100
What term is given to molecules that have both hydrophobic and hydrophilic regions.
Amphipathic
100
Give three pieces of evidence for endosymbiosis
Three of:
Mitochondria & chloroplasts…
- have their own DNA
- have 70s ribosomes
- are membrane bound
- are the same size as prokarytes
- self-replicate
100
Identify the molecule
Monounsaturated fatty acid
200
Write the word equation for a condensation reaction between two protein monomers.
amino acid + amino acid --> dipeptide + water
200
Give an example of a totipotent cell.
Zygote
200
What will happen to a plant cell if it is dropped into a hypertonic solution.
It will plasmolyse.
200
What bonds participate in the tertiary organization of proteins?
covalent bonds
hydrogen bonds
ionic bonds
200
Identify the organelles shown in the micrograph.
Rough Endoplasmic Reticulum
Mitochondria
300
Name the type of molecule shown in the diagram
Steroid
300
State the function of the smooth endoplasmic reticulum
Synthesis of lipids
300
Define faciliated diffusion
The movement of molecules from high concentration to low concentration (down a concentration gradient) through protein channels.
300
State one difference between the lytic cycle and the lysogenic cycle.
Lytic kills host, lysogenic doesn't
Lysogenic inserts DNA in host, lytic doesn't
Lysogenic is longer than lytic
300
Identify the type of cell shown in the micrograph.
Plant cell
400
Sketch graphs showing the effects of temperature, pH and substrate concentration on enzyme activity
400
Draw the structure of a chloroplast
Oval with stacks (grana) of discs (thylakoids)
400
How is water able to dissolve ionic compounds?
The polar water molecules dissociate the ions (break them apart) by attracting to the corresponding sides of the water (i.e. Na+ attracts to the partially negative O on water)
400
Outline the structure and function of 3 adaptations of sperm cells.
Long tail - movement
Mitochondria - energy for movement
Acrosome - to break through egg
Little cytoplasm - streamlined for movement
400
HL Identify the types of inhibition on the graph
A - no inhibitor
B - competitive inhibition
C - noncompetitive/allosteric inhibition
500
Draw a generalized dipeptide, labelling the bond between them with the appropriate name.
500
An image is magnified 4000x. How long (in mm) would a scale bar of 10 μm be?
40mm
500
HL Organize the beakers by increasing water potential.
A, C, B
500
Outline the function of voltage gated channels in neurons.
If voltage is higher than threshold potential (-55mV) the sodium channels open.
If the charge reaches +40mV, the potassium channels open.
This lowers the charge in the cell.
500
Draw and label a diagram of the fluid mosaic model of the membrane.
