Biology, 18.01.2021 19:40 Chapo3760

Draw a portion of a plasma membrane of a cell and label the cytoplasmic and extracellular surface. Place the following four proteins in the membrane: a) peripheral membrane protein (cytoplasmic exposure), b) integral protein (transmembrane exposure), c) integral protein (extracellular exposure) and d) peripheral protein (extracellular exposure)

Answers: 2

Show answers

Answers

Answer from: hunt231

You will find the draw in the attached files.

Explanation:

Integral proteins: Proteins that are permanently encrusted in the membrane. These molecules might be classified into three groups: transmembrane proteins, those encrusted in one of the monolayers, and those that only join a membrane protein.

Transmembrane proteins cross the membrane from side to side. They have three domains in their monoacidic sequences: an extracellular hydrophilic domain, an intracellular hydrophilic domain, and an interior hydrophobic domain. The aminoacidic chain of these molecules might cross the membrane just once or many times, depending on the protein. Transmembrane proteins accomplish many functions, such as substance adhesion, ions interchange, molecules transport, communication, among others.

Proteins encrusted in one of the monolayers do not cross the membrane. Their monoacidic sequences are integrated with only one of the monolayer lipids, hence they have an intramembrane domain and only one extramembrane domain, which might be either cytosolic or extracellular, depending on their position in the membrane.

Peripheral membrane protein: Proteins that are not encrusted in the membrane, but just united to the internal or external membrane surfaces, and they can easily separate from it. Opposite to integral proteins, peripheral ones are not in a permanent association with the membrane. Instead, they are just temporally united to the membrane. This makes them useful for cellular communication. They can be attached to integral proteins and little portions of the lipidic bilayer.
Draw a portion of a plasma membrane of a cell and label the cytoplasmic and extracellular surface. P

Draw a portion of a plasma membrane of a cell and label the cytoplasmic and extracellular surface. P

Answer from: Quest

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation:

Answer from: Quest

Ifound this on google “according to the findings, a foramen magnum positioned toward the base of the skull is found not only in humans, but in other habitually bipedal mammals as well.” i hope this you for what your looking for

Another question on Biology

Biology, 21.06.2019 16:00

Wind energy is plentiful in regions with vast open spaces it is a non polluting renewable resource what could be an economic factor that makes the use of this resource less feasible then non renewable resource even in such regions

Answers: 1

Answer

Biology, 22.06.2019 01:00

The galapagos island contain 13 species of finches four of the species are seen here it is believed that all of the species had one common ancestor and overtime

Answers: 1

Answer

Biology, 22.06.2019 01:30

What macromolecule is produced during translation? a. carbohydrate b. rna c. dna d. protein

Answers: 2

Answer

Biology, 22.06.2019 11:00

Answers to mastering biology drag the labels to their appropriate locations to complete the punnett squares for morgan's reciprocal cross. drag blue labels onto the blue targets to indicate the genotypes of the parents and offspring. drag pink labels onto the pink targets to indicate the genetic makeup of the gametes (sperm and egg). labels can be used once, more than once, or not at all. hints

Answers: 3

Answer

You know the right answer?

Draw a portion of a plasma membrane of a cell and label the cytoplasmic and extracellular surface. P...

Questions