BIOL 1010U Lecture Notes - Lecture 13: Carbohydrate, Keratin, Desmosome

81 views5 pages

salmoncrab283

6 Nov 2017

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

Biology 1010: cell form and function: composition of cytoskeleton, cytoskeleton and motor proteins, extracellular matrix. Tissue collection of cells that work together to perform a specific function. Two or more tissues combined and functioning together is an organ. Cells tissues and organs have distinct shapes (form fits function!) Extracellular matrix (ecm) and cellular junctions structural integrity of tissues or organs (adherence) In plants ecm important in cellular shape and adherence. The protein fibers of cytoskeleton provide internal support for cells. Microtubules are made up of polymers of protein dimers. Each dimer is made of two tubulin proteins: alpha tubulin, beta tubulin. In animal cells centrosome: helps maintain a cell shape and allows it to withstand compression. Microtubules also provide tracks for transport of material. Found in the spindle apparatus (cell division) Relatively short and extensively branched just beneath the plasma membrane of a cell: reinforcement of the plasma membrane, organize membrane proteins.

Related Questions

1. How does the extracellular matrix affect a cell that it surrounds? (Select all that apply.)

	The cell's shape depends in part on the structure and composition of the extracellular matrix.
	The genes that the cell expresses depend in part on the types of proteins in the extracellular matrix.
	The size that the cell grows to depends in part on the polysaccharides in the extracellular matrix.
	The extracellular matrix has no effect on the cells that it surrounds.
	All of these choices are correct.

2. Which of the following enable(s) the movement of cells?

	microtubules
	microfilaments
	intermediate filaments
	microtubules and microfilaments
	microfilaments and intermediate filaments

3. Microtubules increase in length:

	more quickly at one end than the other.
	by growing outward from the centrosome.
	in cycles, following rapid depolymerization.
	if free tubulin dimers are available.
	All of these choices are correct.

4. Dynamic instability is the rapid assembly and disassembly of:

	microfilaments.
	intermediate filaments.
	microtubules.
	both microfilaments and microtubules.

5. Which one of the following is a characteristic shared by integrins and cadherins?

	Both are peripheral membrane proteins.
	Both facilitate the adhesion of cells to extracellular matrix proteins.
	Both are present in adherens junctions, desmosomes, and hemidesmosomes.
	The cytoplasmic domains of both proteins are connected to the cytoskeleton.

6. Cadherin is an example of a(n):

	motor protein.
	intermediate filament protein.
	cell adhesion molecule.
	extracellular matrix protein.

7. Which is the CORRECT order from lesser to greater complexity for the following?

	organs, tissues, cells
	cells, tissues, organs
	tissues, organs, cells
	cells, organs, tissues

pucebear535

1. How does the extracellular matrix affect a cell that it surrounds? (Select all that apply.)

		The cell's shape depends in part on the structure and composition of the extracellular matrix.
		The genes that the cell expresses depend in part on the types of proteins in the extracellular matrix.
		The size that the cell grows to depends in part on the polysaccharides in the extracellular matrix.
		The extracellular matrix has no effect on the cells that it surrounds.
		All of these choices are correct.

2. Dynamic instability is the rapid assembly and disassembly of:

		microfilaments.
		intermediate filaments.
		microtubules.

3. Which one of the following is a characteristic shared by integrins and cadherins?

		Both are peripheral membrane proteins.

		Both are present in adherens junctions, desmosomes, and hemidesmosomes.
		The cytoplasmic domains of both proteins are connected to the cytoskeleton.

4. Which of the following is a mesh-like attachment between cells formed by binding of transmembrane proteins of one cell to the same protein type on the adjacent cell, preventing substances from passing between cells?

		a.) adherens junction
		b.)desmosome

		c.) tight junction

viridianlion889

i need help with this homwork please choose the correct answers and just be claer to read and understand for the slect the apply qusestions too and it is important i realy need the right answers so please be claer not write randomly i really need the correct answers to study for my test so hop you can help me

Question 1

What is the smallest cell you could find?

Question 2

TEMs appear as 3D images

True

False

Question 3

Bacteria are what cell type? Write one word as the answer in lowercase and using no syntax.

Flag this Question

Question 42 pts

ALL eukaryotic cells have which of the following. Click all that apply.

membrane enclosed cell organelles

mitochondria

Question 5

Prokaryotes and eukaryotes both have which if the following cellular components. Click all that apply.

Question 6

I am made of one 60s and one 40s subunit, which organelle am I?

protein

lipid

bacterial ribosome

Question 9

The difference between the rough and smooth ER is

the rough produces lipids where as the smooth does not

the rough has many folds and convolutions where as the smooth does not

the rough has ribosome embedded and the smooth does not

the rough is closer to the cell membrane whereas the smooth is closer to the nucleus

Question 10

The site where many lipids, including cell membrane is produced.

Question 11

Name the organelle: In muscle cells in particular, I would increase in number and size in response to frequent exercise

Question 12

In animal cells, glucose would be mobilized from its storage molecule (glycogen) in this part of the cell.

Question 13

Which of these is associated with the rough ER

production of carbohydrates

production of steroid hormones

production of ATP

production of proteins that are secreted from the cell

Question 14

Which organelle sorts, modifies and stores substances produced on the rough ER. Write two words as the answer in lower case separated by a space.

Question 15

Which organelle is responsible for ATP production. Write one word in the singular as the answer.

Question 16

You inherit all of your mitochondria from your

father

half from your mother and half from your father

your siblings

mother

Question 17

An organelle that contains chlorophyll

Question 18

Microtubules have a variety of roles, which of the options below is NOT one of them?

separate chromosomes

cilia and flagellum movement

tracks for organelle movement

constrict the cell during cell division

Question 19

Made of tubulin subunits

microfilaments

chromosomes

intermediate filaments

microtubules

Question 20

Name the part of the cytoskeleton that is made of two twisted rods of actin. Write one word as the answer in lower case.

Question 21

Which part of the cytoskeleton is made of the same protein as your hair and nails?

microfilaments

microtubules

Intermediate filaments

Question 22

The extracellular matrix is found outside of, but attached to the cell membrane?

True

False

Question 23

Which of the options below is an important function of the extra cellular matrix?

connecting cells together

regulate the movement of substances into and out of the cell

helping cells divide into two cells

keeping the cell in a fixed and ridged shape

Question 24

Which part of the cell wall has a high pectin content?

Question 25

Plants have mitochondria, chloroplasts, a cell wall, and nuclei.

True

False

Question 27

What accounts for 40% of the protein in our bodies?

Question 28

Animal cells have cell walls

True

false

BIOL 1010U Lecture Notes - Lecture 13: Carbohydrate, Keratin, Desmosome

Document Summary

Get access

Related Documents

BIOL 1010U Study Guide - Midterm Guide: Hydrophile, Nuclear Membrane, Transfer Rna

BIOL 1010U Study Guide - Midterm Guide: Ribosomal Rna, Nuclear Membrane, Peptide

BIOL 1010U Lecture Notes - Lecture 10: Intermediate Filament, Depolymerization, Microfilament

Related Questions