Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Biochemistry > Protein Function > Flashcards

Protein Function Flashcards

1
Q

Classes of proteins:

A
  • structural
  • contractile
  • defense
  • transport
  • signaling
  • enzymatic
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Examples of structural proteins:

A
  • hair

- cell cytockeleton

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Examples of contractile proteins:

A
  • muscle

- motile cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Examples of defense proteins:

A
  • antibodies

- membrane proteins

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Examples of transport proteins:

A
  • hemoglobin

- membrane proteins

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Example of signaling protein:

A

hormones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Enzymatic proteins regulate:

A

the speed of biochemical reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Fibrous protein differs from globulin proteins b/c…

A

they are usually elongated/fibrous in form

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Examples of fibrous proteins:

A
  • alpha keratins
  • fibroin
  • collagen
  • elastin
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Alpha keratins are the major proteins in…

A
  • hair
  • fingernails
  • skin
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Alpha keratins are the ______ filament protein

A

intermediate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Alpha keratins are predominately what shape?

A

alpha-helical

- twists together in left-handed coil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Every 4th residue of the alpha helix of alpha keratins is…

A

hydrophobic (makes one side hydrophobic)

- hydrophobic regions stick together

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Fibroin:

A

fibers spun by silk worms and spiders

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Fibroin have long regions of…

A

antiparallel beta sheet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Common sequence of fibroin:

A
  • gly-ala or gly-ser

- allows for close packing

17
Q

Collagen:

A

abundant matrix material in bone, tendons, and skin

18
Q

Tropocollogen:

A

triplet helix made of left-handed helices w/ 3.3 residues per turn

19
Q

Every 3rd residue of collage is a…

A

glycine (central residue)

- usually followed by proline/hydroyproline

20
Q

Hydroxylation of proline requires…

A

vitamin C

21
Q

Deficiency of vitamin C causes…

A

weak tendons due to inability to hydroxylation proline

22
Q

What increases the toughness of collagen?

A

cross linking of lysine side chains (decreases elasticity)

23
Q

Old bones and skin have more…

A

cross-links and are more brittle

24
Q

Elastin is found in…

A
  • blood vessels

- ligaments

25
Q

Elastin is more elastic than…

A

collagen

26
Q

Elastin is rich in:

A
  • glycine
  • alanine
  • valine
27
Q

Structure of elastin is…

A

mostly random coil

28
Q

Elastin will cross-link via…

A

lysines

29
Q

Actin:

A

G-actin monomers come together to form fibrous protein F-actin (has myosin binding sites)

30
Q

Myosin:

A
  • alpha helical tails and globular heads
  • tails tend to aggregate
  • heads tend to bind actin
31
Q

Sarcomere:

A

basic repeating pattern of muscle myofibril

32
Q

A band:

A

overlap of thick and thin filaments

33
Q

I bands:

A

thin filaments only

Biochemistry (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions