Physics of life

PHYS-468

Red Line

This page is part of the content downloaded from Red Line on Monday, 30 June 2025, 15:30. Note that some content and any files larger than 50 MB are not downloaded.

Page content

This file is intended to provide a guide to the contents of the different lectures. The contents below is from the lectures from last year. This will change during the course. Only the lectures that have already passed, should have an up-to-date entry for the "red line". 

Things you should know (about)

Things you will not be asked about in the exam

Structure of Life

  • Cell architecture
  • Organelles
  • Mitochondria
  • Cell membranes
  • Protein synthesis: DNA -> mRNA -> amino acid chain -> protein folding
  • The mechanism of a ribosome
  • Difference between bacteria and eukaryotic cells
  • Difference between plant cells and animal cells
  • Dimensions of atoms, molecules, proteins, organelles, bacteria, human cells, neurons
  • Lipid structure
  • Detergents, Vesicles, Micelles, Membranes
  • Phase transition in 2D in a lipidic membrane
  • Critical Micellar Concentration
  • Protein structure; Primary, Secondary, Tertiary, Quaternary structure
  • Protein components: Alpha helix, Beta sheet, Unfolded 
  • Amino acid classes
  • What is the Isoelectric point (pI)
  • Hydrophobic effect
  • Membrane protein vs. soluble protein
  • How to calculate the isoelectric point (pI)
  • Lysosome
  • Chloroplast
  • Vacuole
  • Golgi
  • Endoplasmatic reticulum
  • Cytoskeleton
  • Waxes
  • Caveolae
  • Synapses
  • Neurotransmitters

Electrophoresis

  • SDS-PAGE
  • non-denaturing gels
  • 2D gels
  • How to make a gradient gel
  • Isoelectric focussing
  • Linear and Gradient Gels
  • Stacking vs. running gels
  • DTT
  • ME
  • Amino acid side chain pK values
  • DNA in gels
  • Capillary electrophoresis
  • Electroosmotic flow
  • Northern, Southern and Western Blotting

Chromatography

  • Peak broadening mechanisms
  • Refractometer mechanism
  • Differential viscometer mechanism
  • Amino acids that absorb light: Which ones, at which wavelengths? 
  • Ion exchange column principle mechanism
  • IMAC column principle mechanism (Ni-NTA)
  • Gel filtration column principle mechanism
  • Column principle: Theoretical plate, propagation speed on a column, peak width on a column, partitioning coefficient
  • Light scattering mechanism
  • FPLC
  • Capacity factor of a column
  • Reversed phase column
  • Hydrophobic interaction column
  • Affinity column
  • Names and types of ion exchange column materials
  • Names and types of gel filtration columns
  • HPLC
  • Perfusion chromatography

Digitalization

  • Raster vs. Vector graphics
  • Histogram
  • LUT
  • Bayer pattern
  • RGB vs. CMYK
  • Metadata
  • Lossy vs. Lossless compression
  • pixels, voxels, bit-depth, number representation in a computer (integer vs. floats)

 Fourier

  • Fourier transform equation (forwards and backwards)
  • Friedel Symmetry
  • Nyquist resolution
  • Powerspectrum
  • Real vs. reciprocal space and their units
  • Cos&Sin representation vs. Amplitude&Phase representation (Argand diagram)
  • Fourier equations:
  • Convolution Theorem in Fourier space (important)
  • Cross-Correlation Theorem in Fourier space (important)
  • How to go from 2D images to a 3D reconstruction, using FT
  • FT(rect, since, delta, Gaussian)
  • How are Fourier transforms stored in computer memory 
  • High-pass, Low-pass, Band-pass
  • MotionCorr, drift correction of movies

Energy Forms

  • Molecules of the Respiratory Chain in Mitochondria
  • F-ATPase structure and mechanism
  • Experiment by the Kinosita group about direct observation of rotation
  • Friction vs. Brownian motion 
  • Ratchet motor
  • Proton Motive Force 
  • Energy of ATP, including Gibbs free energy due to concentration changes
  • Protein folding forces and their binding energies 
  • Melting temperature of a protein
  • Thermofluor & DSC
  • ATPsynthase differences between different organisms
  • V-ATPases
  • van't Hoff's relationship
  • Proposed models for mechanisms of protein folding
  • GroEL 

Mass spectrometry

  • Principle of MS devices
  • Electron ionisation, MALDI, Electro-spray ionisation
  • Time of Flight, Reflectron Time of Flight, Quadrupole 
  • How to calculate the charge and mass of a particle from an ESI-TOF MS spectrum
  • Peptide fingerprinting
  • Protein sequencing with MS
  • FT-Ion Cyclotron Resonance
  • CI, FAB, APCI
  • Double-focusing magnetic sector
  • Quadrupole ion trap
  • Cross-linking MS
  • Limited Proteolysis MS

Hydrodynamic Methods

  • Dynamic viscosity
  • Ubbelohde viscometer
  • Relative, specific and intrinsic viscosity
  • Arrhenius type relationship for viscosity vs. temperature
  • Newtonian vs. non-Newtonian fluids
  • Phase diagram of water
  • Viscosity of DNA or random coil proteins
  • LiquiGlide
  • Ketchup

Surface Effects

  • Surface tension
  • Contact angle of a drop on a surface
  • Detergents, CMC
  • Capillary force
  • Lipid rafts
  • Names and types of detergents
  • Langmuir Blodgett Trough

Calorimetry

  • Entropy, Enthalpy, Inner Energy, Gibbs free energy, Temperature, Entropy, pressure, volume
  • Arrhenius effect, Arrhenius plot
  • Exothermic vs. Endothermic reaction
  • Enthalpy of a reaction
  • Exothermic vs. Endothermic reaction
  • Differential Scanning Calorimetry (DCS)
  • Isothermal Titration Calorimetry (ITC)

Spectroscopy

  • Wave-Particle dualism
  • Continuum of electromagnetic waves: Which radiation types are part of that? 
  • Other types of radiation? 
  • Beer-Lambert law
  • Absorbance vs. Fluorescence
  • Which amino acids show fluorescense?
  • ORD
  • Circular Dichroism (CD): What is it, how does it work, what does one measure? 
  • CD spectra of alpha-helical, beta-sheet and random-structure protein specimens
  • FTIR: How does it work? 
  • Michelson-Moorley experiment
  • Raman spectroscopy: What is it? How is it measured? What does it show about the sample? 
  • Stokes and Anti-Stokes shifts 
  • OCT (added only on June 19, 2025)
  • Human retina
  • Absorption spectra of different biomolecules
  • Bradford assay
  • Thalidomide, Contergan
  • CD spectra of DNA and RNA
  • FTIR spectra of different substances

Radiation Biophysics

  • Bohr model, isotopes, 
  • Nuclear fission chain reaction principle
  • Alpha, beta, gamma, neutron radiation, UV light and X-rays and other electromagnetic rays
  • Radiation units: CPM, Curie, R, RAD, Gray, Sievert. What are they, what do they measure
  • Typical amount of radiation per person per year in Switzerland in mS
  • How many mS are threasholds for annual exposure, how many mS are dangerous if received in one exposure.
  • Technetium-99m in medicine
  • SPECT, PET principle
  • Gamma knife principle
  • Iodine 131 used in radiation therapy
  • Protection effect of different materials against different types of radiation (alpha, beta, gamma, neutrons)
  • Physical vs. biological half-life time.
  • Symptoms or radiation poisioning
  • Chernobyl reactor principle and accident
  • Other types of radiation used in medicine

Electron Microscopy in Life Sciences

  • Electron Source types
  • SEM construction principle, operating mechanism, type of data recorded (surface) 
  • TEM construction principle, operating mechanism, type of data recorded (projection) 
  • Sample preparation principles for negative stain, for cryo-EM
  • Electron/sample interaction
  • Cryo-EM principle, workflow
  • Frontiers in single particle cryo-EM: What are the limitations of current technology?
  • Cryo-electron tomography principle
  • How can sample movement during image recording be adressed?
  • How can the noisy images still be used for a high-resolution reconstruction?
  • How can the images be used to generate a 3D reconstruction of particles, or of a cell tissue slice?
  • FSC, how is resolution measured?
  • Image formation
  • Contrast transfer function (CTF)
  • Effect of Defocus on the CTF
  • RNA binding complex
  • ABCG2 protein
  • FOCUS software
  • Microfluidic Cryo-EM grids
  • Proteasome
  • Tobacco Mosaic Virus (TMV)

NMR spectroscopy, SPR

  • Principle of NMR spectroscopy.
  • How does the B-field relate to the proton resonance frequency?
  • What is chemical shielding?
  • How can a 1D NMR spectrum be interpreted?
  • What is 2D NMR spectroscopy
  • SPR, 

AFM

  • STM vs. AFM, mechanism, principle of operation, what is measured and how? 
  • AFM: Construction principle, how can it operate on a sample that is in water? 
  • Typical resolution of STM and AFM
  • Requirements for biological samples for imaging by AFM
  • Conformational Landscape of a protein
  • Typical sources of artifacts in STM and AFM
  • Tapping mode vs. Contact (constant force or constant height) mode
  • How can an energy landscape of a protein surface be determined from an AFM image
  • High-speed AFM
  • Kavli prize
  • Corynebacterium, S-layer
  • Unzipping
  • Aquaporin
  • Photosynthesis
  • Photosynthetic apparatus, photosynthesis molecules
  • Supercomplexes in photosynthesis
  • Myosin
  • Affinity imaging with the AFM
  • Unzipping with the AFM
  • Force spectroscopy
  • Tissue characterisation with the AFM
  • Nanomechanical sensors

X-ray diffraction

  • XRD principle
  • 3D protein crystal
  • Methods to produce 3D protein crystals
  • Ways to produce X-rays
  • Synchrotrons
  • Bragg's law
  • Resolution in Fourier space
  • What is the phase problem in X-ray diffraction
  • Equation for X-ray beam intensity 

Free Electron Laser

  • SwissFEL: Setup, mechanism: How are X-rays generated?
  • What is the specific about FEL radiation?  
  • Why did people think that is an advantage for structural biology?  (Neutze et al.)
  • Intensities of different X-ray sources
  • Parameters of SwissFEL beamlines

Stahlberg lab setup and research

  • Nothing here
  • This will not be part of the exam