Fechar
Nothing less than _______ can be called living.
An organised assembly of cells and their extracellular
products which carry out similar and coordinated activities
within the body
An assembly of tissues coordinated to perform specific
functions within the body
An assembly of organs with specific, related activities,
sharing regulatory influences
A diffuse functional network of cells situated in many
parts of the body, sharing specific activities
The three main characteristics of a prokaryote (3)
Eukaryotic DNA is
Main components of a virus
Viruses subvert _________ machinery to make more viruses
Viruses are not cells or organisms in the strict sense because.... (2)
Extra-chromosomal DNA is found in
Ribosome of prokaryotes
Ribosome of eukaryotes
Transmission Electron Microscope (TEM)
Scanning Electron Microscope (SEM)
Both types of EM involve elaborate preparation and can only
evaluate ___ cells
Life span of enterocytes
Life span of erythrocytes
Life span of neurons
Limits of the maximum size of a cell
Diffusion efficiency at a distance above _____ is reduced
Surface Area (SA) :
Sphere: SA =
Sphere V=
How to specialised cells overcome this problem of diffusion distance? (3)
Thin processes
Giant” multinucleate cells
Types of protein filament that make up cytoskeleton
Cytosol
The only organelle visible by light microscopy
Chromatin
DNA winds around histones into _______
Length of naked DNA
Length of DNA packaged into nucleosomes
DNA length post mitosis
Non-dividing chromatin is ____
Nucleolus (3)
Smooth endoplasmic reticulum (SER) (2)
Rough endoplasmic reticulum (RER) (3)
Golgi body composition
Golgi
Golgi vesicles
SER concentrations are high in the
RER concentrations are high in
Mitochondria composition (3)
Mitochondria
Number of _______ per cell reflects metabolic activity
Functional vesicles
Lysosomes composition (2)
Lysosomes
Peroxisomes composition
Peroxisomes
Zellweger syndrome
Myoclonic Epilepsy with Ragged Red Fibers (MERRF syndrome) (2)
Hutchinson-Gilford Progeria (3)
Tay Sachs Disease
