TT collections

Question 1

what triggers the SOS response in E coli?

Answer 1

DNA damage

Question 2

what does the SOS response do?

Answer 2

triggers DNA repair pathways

Question 3

conjugation

Answer 3

transfer of genetic material through direct contact

Question 4

transformation

Answer 4

takeup of genetic material from the environment

Question 5

transduction

Answer 5

transfer of genetic material via a viral vector

Question 6

recombination

Answer 6

large sections of DNA exchanging- occurs during meiosis in sexually reproducing organisms

Question 7

magnetosome

Answer 7

structures in bacteria that allow them to detect the planet’s magnetic poles

Question 8

–bacteria–

Question 9

elaioplast

Answer 9

plastid specialised to contain oil/lipid

Question 10

chromoplast

Answer 10

plastid containing pigment

Question 11

paraphyletic

Answer 11

all are descended from a single common ancestor, but not all ancestors are in the group

Question 12

polyphyletic

Answer 12

group derived from more than one common ancestor

Question 13

top 3 phyla in terms of species number

Answer 13

arthropoda, mollusca, chordata

Question 14

defining features of gastropods

Answer 14

radula, torsion

Question 15

what is sequencing by synthesis?

Answer 15

Illumina- DNA synthesis mechanism used to detect an order of bases

Question 16

what is arthropod cuticle made out of?

Answer 16

sclerotin and chitin

Question 17

methods of gene transfer in plants

Answer 17

agrobacterium, infection
calcium phosphate precipitation
microinjection
microprojectile bombardment

Question 18

what kinds of insects use direct flight muscles?

Answer 18

larger, such as dragonflies

Question 19

what kinds of insects use indirect flight muscles?

Answer 19

more ‘advanced’ such as true flies

Question 20

how much of the eukaryotic genome is transcribed into RNA?

Answer 20

4%

Question 21

how much of the eukaryotic genome is transcribed into mRNA?

Answer 21

1%

Question 22

how much of the eukaryotic genome is structural?

Answer 22

telomeres- 1%, centromeres 10%

Question 23

pyramidine bases

Answer 23

C T U

Question 24

purine bases

Answer 24

A G

Question 25

what do longer tails on membrane lipids do to fluidity

Answer 25

decrease (more interaction)

Question 26

chondrichythes

Answer 26

cartilaginous fishes

Question 27

actinopterygians

Answer 27

ray-finned fish

Question 27

Sarcopterygians

Answer 27

lobe-finned fish and tetrapods

Question 28

what fish have swim bladders?

Answer 28

‘bony fish’- sarco/actinopterygians

Question 29

how do chondrichthyes maintain buoyancy?

Answer 29

oil-filled liver