Mitosis + meiosis Flashcards
(22 cards)
basic structure of DNA
Double helix
list the complementary base pairs
AT
CG
How many hydrogen bonds are found between base pairs A and T
2
How many hydrogen bonds are found between base pairs C and G
3
How many bases is DNA comprised of
4
List the full names of the 4 DNA base pairs
Adenine
Thymine
Guanine
Cytosine
What are the proteins that the double helix coils around
nucleosomes
DNA is
A)Very tightly packaged
B)Very loosely packaged
A
How many chromosomes are present in the human genome
46 (23 pairs)
how many pairs of chromosomes are present in the human genome
22 + sex chromosomes
Chromosomes have
A) 2 long arms
B) 1 short arm + 1 long arm
C) 2 short arms
B
What alphabetic letter is allocated for the long arm
q
What alphabetic letter is allocated for the short arm
p
what in chromosomes separates the short and long arm
A)Telomere
B)Centrosome
C)centromere
D)Desmosome
centromere
Describe basic telomere function
A)To prevent cancer
B)To help make Okazaki fragments
C)To protect DNA polymerase
D) To protect the ends of chromosomes
D
Telomerase function
A)Extend telomeres
B)Make copies of telomeres
C)Extend DNA
D)Make copies of DNA
A
Approx number of base pairings in DNA
A)10^3
B)10^4
C)10^5
D)10^6
D
Which stain is used for G banding
Giemsa
Which stain is used for Q banding
quinacrine
Which on of these is incorrect about mitosis
A)produces 2 genetically identical cells
B)genetically different to parent
C)Replaces dead cells
D)Growth
B
During mitosis, chromosomes attach themselves to microtubules that propagate from centrosomes.
What are these microtubules made of?
Tubulin
Examining a histological section, a pathologist sees a cell undergoing mitosis. The chromosomes are moving towards opposite poles of the cell and there are no nuclear membranes.
Which phase of mitosis is this?
Anaphase
