BIO 1140 Lecture Notes - Elastin, Organism, Integral Membrane Protein

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5 Sep 2013

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Cells are not in isolation they are part of a multi cellular organism and therefore they need to interact with the cells around them. Plant cell wall produced by plant cell on outside of plasma membrane, and it serves to provide support (lack intermediate filaments), and it regulates permeability in some sense. Within matrix there are structural fibrils to provide mechanical strength: Matrix mainly of hemicellulose and pectins, they attract water. Cellulose microfibrils provide strength to a cell wall. Cellulose is a glucose polymer (long string of glucose), the cellulose microfibrils give strength to the cell wall, because they are imbeded in the pectin, and give the structural support. Movement of cellulose is guided by microtubules so that youcan get patterns (networks) of cellulose. Changing the pattern of microtubules changes the pattern of cell formation. Problem with cell wall is it makes it difficult for the cells to communicate with each other.

Related Questions

1. Prokaryotic cells are able to evolve very fast, which helps them to rapidly adapt to new food sources and develop resistance to antibiotics. Which of the options below lists the three main characteristics that support the rapid evolution of prokaryotic populations?

no organelles, cell wall, can exchange DNA

large population, rapid growth, can exchange DNA

aerobic, motile, rapid growth

microscopic, motile, anaerobic

The cytoskeleton provides support, structure, motility, and organization, and it forms tracks to direct organelle and vesicle transport. Which of the cytoskeletal elements listed below is the thickest?

none of the above (all the same thickness)

intermediate filaments

microtubules

actin filaments

What unit of length would you generally use to measure a typical plant or animal cell?

millimeters

nanometers

centimeters

micrometers

Which of the following are examples of isomers?

adenine and guanine

glycogen and cellulose

alanine and glycine

glucose and galactose

Which of the following factors do not influence the length of a covalent bond?

the attractive forces between negatively charged electrons and positively charged nuclei

the tendency of atoms to fill the outer electron shells

the repulsive forces between the positively charged nuclei

the minimization of repulsive forces between the two nuclei by the cloud of shared electrons

You wish to explore how mutations in specific genes affecting sugar metabolism might alter tooth development. Which organism is likely to provide the best model system for your studies.

E. coli

mice

horses

Arabidopsis

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.

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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

BIO 1140 Lecture Notes - Elastin, Organism, Integral Membrane Protein

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