Week 3 - Mon - Trafficking of Membrane Proteins

Question 1

vesicles

Answer 1

membrane enclosed sacks

Question 2

membrane enclosed sacks

Answer 2

vesicles

Question 3

ER

Answer 3

endoplasmic reticulum

Question 4

ribosomes attach to a part of the cell membrane called the ________________

Answer 4

rough endoplasmic reticulum

Question 5

the smooth endoplasmic reticulum lacks_________

Answer 5

ribosomes

Question 6

cytosol

Answer 6

contains many metabolic pathways , protein synthesis, the cytoskeleton

Question 7

nucleus

Answer 7

contains main genome, DNA + RNA synthesis

Question 8

ER (endoplasmic reticulum)

Answer 8

synthesis of most lipids, synthesis of proteins for distribution to many organelles and to the plasma membrane

Question 9

golgi apparatus

Answer 9

modification, sorting, and packaging f proteins and lipis for either secretion of delivery to another organelle

Question 10

lysosomes

Answer 10

intracellular degradation

Question 11

endosomes

Answer 11

sorting of endocytosed material

Question 12

mitochondria

Answer 12

ATP synthesis by oxidative phosphorylation

Question 13

chloroplasts

Answer 13

ATP synthesis and carbon fixation by photosynthesis

Question 14

peroxisomes

Answer 14

oxidation of toxic molecules

Question 15

how are organelles held in place?

Answer 15

attachment to cytoskeleton / microtubules

Question 16

how do mitochondria, chloroplasts, peroxisomes and the nucleus get their required proteins?

Answer 16

directly through the cytoplasm

Question 17

how do the lysosomes, endosomes, golgi apparatus, and inner nuclear membrane get their proteins?

Answer 17

indirectly through the ER –» golgi –»distributed

Question 18

the synthesis of virtually all proteins begins on ______ in the ______

Answer 18

ribosomes, cytosol

Question 19

a sorting signal is______

Answer 19

an amino acid sequences that directs the protein to the organelle in which it is required

Question 20

3 methods of protein transport

Answer 20

nuclear pore, protein translocators, transport vesicles

Question 21

proteins must _______ to work through the _______ and move from the cytosol into the ER

Answer 21

unfold , protein translocator

Question 22

the signal sequence is typically between ___ and ____ amino acids long, and is usually______ from the protein once finished

Answer 22

15-60, removed

Question 23

_______ encloses the nuclear DNA and defines the nuclear compartment

Answer 23

nuclear envelope