Exam 2 Flashcards
(20 cards)
________ activate and repress the expression of genes.
Transcription factors
________ require increased blood flow to fuel uncontrolled growth.
Cancer cells
What is transduction?
(genetic recombination) 1. Genes in host cell incorporated into genome of phage 2. Carried to another host cell 3. Phage initiates infection.
A sex pilus is needed for bacterial ______.
Conjugation
What is conjugation?
- DNA transferred between two prokaryotic cells 2. cells are temporarily joined
What is transformation?
The genotype and phenotype of a Prokaryotic cell are changed by uptake (death) of foreign DNA.
What is the difference between Prokaryotic and Eukaryotic cells?
Prokaryotic has a nucleic region.
The nucleus and ____ ______ are physically connected but carry out distinct functions in eukaryotic cells
endoplasmic reticulum
What kind of microscopy can be used to see external structure of a virus?
Scanning electron microscopy (SEM)
What is cell fractionation?
The study of individual components.
What kind of microscopy can be used to see internal structure of cells?
Transmission electron microscopy (TEM)
What is the difference between SEM and TEM?
SEM is external and TEM is internal.
resolution has an _____ relationship to wavelength of light.
inverse
What feature of mitochondria allows them to make ATP efficiently?
The internal membrane is folded into cristae.
The structure where photosynthesis in chloroplasts occurs is called _______.
thylakoid membranes
_____ is used by cells to create cytoskeletal filaments primarily needed to organize the location of organelles.
Tubulin
Tubulin is a ______.
protein.
Why are lipids and proteins free to move laterally in a membrane?
There are only weak hydrophobic interactions in the interior of the membrane
Saturated fats have no ___ _____ in the carbon chains of their fatty acids.
double bonds.
Phospholipids and triglycerides have a _____ backbone.
glycerol.
