Cell Biology

(exocytosis OR endocytosis) transports of insulin and cholesterol into animal cells?

(exocytosis OR endocytosis) transports of insulin and cholesterol into animal cells?

Which of the following is an example of the transport of insulin and cholesterol into animal cells?

exo or endo?

zzz   1102   3 Replies

smn

whats the difference between phagocytosis and pinocytosis?

whats the difference between phagocytosis and pinocytosis?

Please help me, it homework on a diagram and its not in my secience book and when i look both up in Wikipedia they gave me both the same answer.
science book**

zzz1090   576   1 Reply

asmckinley

What is the difference between osmosis and diffusion?

What is the difference between osmosis and diffusion?

Please help! I have a VERY important & huge science test tomorrow and i am trying to study, but I can't figure out what the difference is between osmosis and diffusion. Thank you!!!

_biology   666   4 Replies

Firas

How does molecular motors convert the chemical energy present in ATP into mechanical energy for moving vesicle

How does molecular motors convert the chemical energy present in ATP into mechanical energy for moving vesicle

I need the details of this process

_biology   515   1 Reply

_brooksd

What is a vesicle that contains enzymes?

What is a vesicle that contains enzymes?

What is a vesicle that contains enzymes?

_biology   462   2 Replies

smlan3

What is the difference between a karyotype and a pedigree?

What is the difference between a karyotype and a pedigree?

What is the difference between a karyotype and a pedigree?

_biology   496   1 Reply

SmurfBio

Alcohol increases the production of the neurotransmitter GABA, how are GABA levels returned back to normal?

Alcohol increases the production of the neurotransmitter GABA, how are GABA levels returned back to normal?

ie. is there a specific enzyme that inhibits/removes GABA?

_biology   566   3 Replies

rk_9879

how the movement of electrons down the electron transport chain is linkedto production of ATP by chemiosmosis?

how the movement of electrons down the electron transport chain is linkedto production of ATP by chemiosmosis?

how the movement of electrons down the electron transport chain is linkedto production of ATP by chemiosmosis?

_biology   752   3 Replies

irina

One of the reasons for the use of plasmid cloning vectors is the ease with which they can be separat

One of the reasons for the use of plasmid cloning vectors is the ease with which they can be separat

(a) One of the reasons for the use of plasmid cloning vectors is the ease with which they can be separated from the bacterial chromosomal DNA. Describe how this is achieved.

(b) What are the different methods for introducing a plasmid DNA into a bac

_biology   718   2 Replies

bio_man

Where can I get some sodium thiopental, pancuronium bromide, potassium chloride, and saline solution?

Where can I get some sodium thiopental, pancuronium bromide, potassium chloride, and saline solution?

Where can I get some sodium thiopental, pancuronium bromide, potassium chloride, and saline solution?

_biology   483   1 Reply

tony12

Which statements are true about the binding of histamine to the histamine H1 receptor?

Which statements are true about the binding of histamine to the histamine H1 receptor?

Select all that apply

1. Histamine diffuses across the plasma membrane to bind to the H1 receptor.
2. Histamine binds extracellularly to the H1 receptor.
3.When histamine binds to the H1 receptor, the receptor undergoes a conformation change and bin

_biology   1646   1 Reply

juliar33

A part of the brain used in the tranfer of info from one cerebral hemisphere to the other is the

A part of the brain used in the tranfer of info from one cerebral hemisphere to the other is the

i am studying for the ap bio exam, and i am answering the practice questions but i do not have the answer key thus i need the correct answers to the following questions. thanks

1. A part of the brain used in the tranfer of info from one cerebral

_biology   418   1 Reply

ild

Can a bacteriophage infect both gram positive and gram negative bacteria?

Can a bacteriophage infect both gram positive and gram negative bacteria?

Are there bacteriophages that can infect both?

Gram negative bacterial cell wall are more difficult to digest, they comprise of an additional lipoprotein layer, on top of the peptidoglycan layer.

Thanks !

_biology   1759   2 Replies

tomcnulty

What is a pinocytic vesicle?

What is a pinocytic vesicle?

I have looked on so many websites, but it just tells me about pinocytosis, not the vesicle, so what is it?

_brooksd   436   1 Reply

firechoker

Centrioles, and (flagella, and cillia)

Centrioles, and (flagella, and cillia)

How are centrioles the most essential organelle for cell survival?
Is there a good argument that I could use to support this?

__1   344   1 Reply

Das7722

A chemical synpase must include which of these combinations?

A chemical synpase must include which of these combinations?

would that be only axon terminal, presynaptic cell, and postsynaptic cell? or synaptic cleft is also part of the combination?
axon terminal
presynaptic cell
postsynaptic cell
synaptic cleft

which of these are included? Please explain.

__Aycee   248   1 Reply

nurazije

If Ca+ channels are blocked by a toxin, can the neuron fire an action potential and/or transmit a signal?

If Ca+ channels are blocked by a toxin, can the neuron fire an action potential and/or transmit a signal?

If a toxin blocks the Ca+ channels, can a neuron exposed to the toxin fire an action potential and/or can it transmit a signal across the synapse using neurotransmitters? Please explain.

__Aycee   728   2 Replies

rin615

Which of the following is not a major functional class of proteins?

Which of the following is not a major functional class of proteins?

Which of the following is not a major functional class of proteins?
 
  A) hereditary proteins
  B) enzymes
  C) motility proteins
  D) regulatory proteins
  E) structural proteins

張鈺禾   101   1 Reply

canelo

Which of the following is not a polymer of numerous monomer units?

Which of the following is not a polymer of numerous monomer units?

Which of the following is not a polymer of numerous monomer units?
 
  A) a phospholipid
  B) a polypeptide
  C) an RNA molecule
  D) cellulose
  E) starch

張鈺禾   55   1 Reply

kburke

The chromoplast is an organelle associated with :

The chromoplast is an organelle associated with :

The chromoplast is an organelle associated with
 
  A) oxidation of sugars.
  B) synthesis of secretory proteins.
  C) plant pigment storage.
  D) ribosome production in primitive plants.
  E) storage of chromium.

張鈺禾   30   1 Reply

jacobhollyy

Of the following molecules, which would you predict diffuses most readily across membranes?

Of the following molecules, which would you predict diffuses most readily across membranes?

Of the following molecules, which would you predict diffuses most readily across membranes?
 
  A) water
  B) glucose
  C) oxygen
  D) serine
  E) hydrogen ions

張鈺禾   45   2 Replies

張鈺禾

The most common number of carbons in fatty acid hydrocarbon chains of membrane phospholipids is ...

The most common number of carbons in fatty acid hydrocarbon chains of membrane phospholipids is ...

The most common number of carbons in fatty acid hydrocarbon chains of membrane phospholipids is
 
  A) 7.
  B) 10.
  C) 16.
  D) 19.
  E) 24.

張鈺禾   67   2 Replies

張鈺禾

The erythrocyte anion exchange protein ping-pong transport mechanism involves :

The erythrocyte anion exchange protein ping-pong transport mechanism involves :

The erythrocyte anion exchange protein ping-pong transport mechanism involves
 
  A) binding of Cl on one side of the membrane.
  B) binding of bicarbonate ion on one side of the membrane.
  C) unidirectional transport of Cl onl

張鈺禾   53   1 Reply

mickeymouse1

Allosteric regulation of key enzymes in glycolytic and gluconeogenesis pathways may involve each of ...

Allosteric regulation of key enzymes in glycolytic and gluconeogenesis pathways may involve each of ...

Allosteric regulation of key enzymes in glycolytic and gluconeogenesis pathways may involve each of the following except
 
  may involve each of the following except
  A) activating the enzyme activity.
  B) inhibiting the enzy

張鈺禾   47   1 Reply

haylsm112

The loss of a(n) ________ increases entropy during hydrolysis of ATP. (Fill in the blank)

The loss of a(n) ________ increases entropy during hydrolysis of ATP. (Fill in the blank)

The loss of a(n) ________ increases entropy during hydrolysis of ATP.
 
  Fill in the blank with correct word.

張鈺禾   39   1 Reply

bethclip

The energy transduction reactions of photosynthesis convert solar energy into chemical energy in the ...

The energy transduction reactions of photosynthesis convert solar energy into chemical energy in the ...

The energy transduction reactions of photosynthesis convert solar energy into chemical energy in the form of ________ and ________.
 
  Fill in the blank with correct word.

張鈺禾   99   1 Reply

mickeymouse1

Which of the following proteins is associated with the precise control of where microtubules ...

Which of the following proteins is associated with the precise control of where microtubules ...

Which of the following proteins is associated with the precise control of where microtubules depolymerize during mitosis?
 
  A) Tau
  B) stathmin/Op18
  C) gelsolin
  D) catastrophins
  E) MAP 2

張鈺禾   46   1 Reply

rayohn2010

In an experiment like that of the 1952 Hershey and Chase experiments, 35S was added to a phage ...

In an experiment like that of the 1952 Hershey and Chase experiments, 35S was added to a phage ...

In an experiment like that of the 1952 Hershey and Chase experiments, 35S was added to a phage replicating within its bacterial host.
 
  The new phage particles were carefully isolated and used to infect fresh bacterial cells in the absen

張鈺禾   90   1 Reply

steffers12

Fluorescent in situ hybridization (FISH) would be helpful in determining :

Fluorescent in situ hybridization (FISH) would be helpful in determining :

Fluorescent in situ hybridization (FISH) would be helpful in determining
 
  A) the location of B-DNA and Z-DNA.
  B) the position and structure of nucleosomes.
  C) the position of particular chromosomes or sequences inside the

張鈺禾   58   1 Reply

hellokristi4

DNA contains thymine rather than uracil. Why is the presence of thymine in DNA advantageous? What ...

DNA contains thymine rather than uracil. Why is the presence of thymine in DNA advantageous? What ...

DNA contains thymine rather than uracil. Why is the presence of thymine in DNA advantageous? What effect would the presence of uracil in DNA have on DNA repair?
 
  What will be an ideal response?

張鈺禾   56   1 Reply

PrincessAwesome

Cells that use the amino acids selenocysteine and pyrrolysine have :

Cells that use the amino acids selenocysteine and pyrrolysine have :

Cells that use the amino acids selenocysteine and pyrrolysine have
 
  A) two more codons compared to other cells.
  B) two more tRNAs compared to other cells.
  C) two more aminoacyl-tRNA synthetases compared to other cells.

張鈺禾   47   1 Reply

garroghuu

You are interested in mapping the relative positions of three genes in the E. coli genome and have ...

You are interested in mapping the relative positions of three genes in the E. coli genome and have ...

You are interested in mapping the relative positions of three genes in the E. coli genome and have access to several cell types to use for the mapping:
 
  a) Describe F, F+, Hfr, and F' bacterial cell types.
  b) How would you use o

張鈺禾   46   1 Reply

canelo

You purchase a black dog (B = black, b = brown; B is dominant to b) from a breeder who tells you ...

You purchase a black dog (B = black, b = brown; B is dominant to b) from a breeder who tells you ...

You purchase a black dog (B = black, b = brown; B is dominant to b) from a breeder who tells you that the dog is a purebred, and that she will forward its papers to you at a later date.
 
  You mate the dog with a brown dog of the same bre

張鈺禾   50   1 Reply

garroghuu

The anti-angiogenic drug Avastin works by binding to and inhibiting the activity of :

The anti-angiogenic drug Avastin works by binding to and inhibiting the activity of :

The anti-angiogenic drug Avastin works by binding to and inhibiting the activity of
 
  A) EGF.
  B) VEGF.
  C) estrogen.
  D) IL-2.
  E) Ras.

張鈺禾   53   1 Reply

achurch

Match the gene on the left with the gene category on the right. Note choices on the right may be ...

Match the gene on the left with the gene category on the right. Note choices on the right may be ...

Match the gene on the left with the gene category on the right. Note choices on the right may be used more than once or not at all.
 
  A) proto-oncogene
  B) low expression in invasive cells
  C) tumor suppressor gene
  D)

張鈺禾   44   1 Reply

Beehappy2

Proteins are important architectural and catalytic components within the cell, helping to determine ...

Proteins are important architectural and catalytic components within the cell, helping to determine ...

Proteins are important architectural and catalytic components within the cell, helping to determine its chemistry, its shape, and its ability to respond to changes in the environment.
 
  Remarkably, all of the different proteins in a cell

張鈺禾   64   1 Reply

mrperretti

Are the statements below true or false? Explain your answer.

Are the statements below true or false? Explain your answer.

Are the statements below true or false? Explain your answer.
 
  A. Statement 1: Generally, in a given organism, the S, G2, and M phases of the cell cycle take a defined and stereotyped amount of time in most cells.
  B. Statement 2:

張鈺禾   83   2 Replies

張鈺禾

Which of the following statements about peroxisomes is false? (a) Most peroxisomal proteins are ...

Which of the following statements about peroxisomes is false? (a) Most peroxisomal proteins are ...

Which of the following statements about peroxisomes is false?
 
  (a) Most peroxisomal proteins are synthesized in the ER.
  (b) Peroxisomes synthesize phospholipids for the myelin sheath.
  (c) Peroxisomes produce hydrogen perox

張鈺禾   73   1 Reply

Beehappy2

Cells make use of H+ electrochemical gradients in many ways. Which of the following proton ...

Cells make use of H+ electrochemical gradients in many ways. Which of the following proton ...

Cells make use of H+ electrochemical gradients in many ways. Which of the following proton transporters is used to regulate pH in animal cells?
 
  (a) light-driven pump
  (b) H+ ATPase
  (c) H+ symporter
  (d) Na+-H+ exchan

張鈺禾   40   1 Reply

Brandy16

Select the best option to fill in the blanks of the following statement: Fermentation is a/an ...

Select the best option to fill in the blanks of the following statement: Fermentation is a/an ...

Select the best option to fill in the blanks of the following statement: Fermentation is a/an _____________________ process that converts _____________ into carbon dioxide and _____________________.
 
  (a) anaerobic, pyruvate, ethanol

張鈺禾   141   2 Replies

Joseph Bernardo