Explain two ways materials can enter the cell through passive transport. Include in your answer: the types of substance that is transported, the concentration gradient, and any structures in the cell membrane required to be used.
Explain two ways materials can enter the cell through passive transport. Include in your answer: the types of substance that is transported, the concentration gradient, and any structures in the cell membrane required to be used.
Answers
Answer:
Osmosis and facilitated diffusion are two forms of passive transport that are integral to cellular transport mechanisms.
Explanation:
Cells surrounded by a bilipid layer or plasma membrane are amphiphilic, with their polar, hydrophilic lipid heads facing outward, while their hydrophobic non-polar lipid tails facing each other inward.
Although lipid-soluble molecules travel quickly through the bilayer, traveling across its surface into the cell is often difficult for charged and large molecules. Thus, transport proteins, pores and gated channels, transmembrane channels, embedded within the membrane, help to preserve selective permeability.
Across plasma membranes as a form of passive transport in cells, substances move via:
osmosis - water molecules readily pass through the membrane; the molecules move from high concentration regions to low concentration regions at will through the membrane- they move down their concentration gradientfacilitated diffusion - channel proteins allow charged ions to move across the membrane. Sodium ions are able to pass freely through specialized sodium channel pores into some cells. These channels always remain open- the ions move down their concentration gradient.
Related Questions
12. A hiker has become overwhelmed with heat while walking in the Grand Canyon. The hiker's body goes into overdrive to keep cool in the heat. The
hiker needs to hydrate his or her cells. What process is used to regulate homeostasis?
. A. Cellular transport
O B. Passive transport
O C. Balanced equilibrium
O D. Hydration
Answers
Density independent factors are
Answers
Answer:
Density-independent factor, also called limiting factor, in ecology, any force that affects the size of a population of living things regardless of the density of the population (the number of individuals per unit area).
Explanation:
The category of density independent limiting factors includes fires, natural disasters (earthquakes, floods, tornados), and the effects of pollution.
Question 1 of 10
In a cell, the two strands of a double helix of DNA do not unwind as expected,
which causes DNA replication to be blocked. What is most likely
dysfunctional in this cell?
A. Okazaki fragments
B. Helicase
C. DNA polymerasel
D. RNA primer
SUBMIT
Answers
It’s not RNA primer or DNA polymerase I got it wrong twice
it’s B; helicase.
just took the quiz.
What characteristic of viruses places it under the category of a "non-living" entity?
O a) It can be visualized only under an electron microscope.
b) It needs a host to reproduce and cannot do it independently.
O c) It cannot be crystallized into a solid substance like powder.
d) It cannot move as only living organisms exhibit mobility.
Answers
Answer:
b) It needs a host to reproduce and cannot do it independently.
Explanation:
Copies of chromosomes are called____
1) platelets.
2)sister chromatids.
3)stem cells.
4) macrophages.
Answers
Answer:
option 2
Explanation:
because there divide
1. Which of the following is the BEST description of forest soil?
A. thin humus layer, minerals deep beneath the surface.
B. thin humus layer, minerals close to the surface
C. very little humus, rich in minerals
D. very little humus, few minerals
2. Which of the following is not a fossil fuel?
A. oil
B. natural gas
C. coal
D. solar energy
Answers
Answer:
1. Thin Humus layer, minerals deep beneath the surface
2.Solar energy
Explanation:
I just took the test and got it right.
Answer:
1. A. Thin Humus layer, minerals deep beneath the surface
2. D. Solar energy
Explanation:
Therefore, out of the following, wood is NOT a fossil fuel. Oil, coal and natural gas are all resources made in the geological past from the remains of living organisms (fossils), meaning that they are all fossil fuels.
a 100 watt electric bulb is used for five hours.how much energy is consumed by the bulb
Answers
Answer:
500Whr=0.5kWhr
1Joule=1 Watt×1Sec
100×5×60×60=1.8M joules
Answer:
0.5kWh
Explanation:
Given, power of the electric bulb,
P=100W=(100/1000)kW=0.1kW ;
time for which bulb is used, t=5h
As P=
[tex] \frac{w}{t} [/tex]
or W=Pt
or W=0.1kW×5h= 0.5kWh
A random mutation occurs and the GGA codon is changed to CGA. What effect does this
substitution have on the amino acid being called for? Explain your answer.
Answers
Answer:
The replacement of a base at a codon, as occurs when the GGA codon is changed to CGA, causes a change in the amino acid glycine to arginine.
Explanation:
Nitrogen base changes in a codon usually result from base changes in the DNA before transcription into messenger RNA, called point gene mutations.
In the case presented, the substitution of the guanine base by cytosine in the GGA codon —resulting in a CGA codon— generates a change in the coding amino acid, resulting in arginine instead of glycine.
The change of an amino acid in a peptide or protein can mean an alteration in the structure or function of these molecules.
Because an amino acid can be encoded by several codons, changes of a nitrogen base at a codon sometimes do not involve changes in the amino acid sequence of a protein.
The replacement of a base at a codon, as occurs when the GGA codon is changed to CGA, causes a change in the amino acid glycine to arginine.
Due to Base Substitutions Mutations.
What happens when a mutation changes a codon?
A nonsense mutation refers to a base substitution in which the changed nucleotide transforms the codon into a stop codon.
Such a modification leads to a premature termination of translation, which can badly affect the formation of proteins.
Thus, Base Substitutions Mutations take place.
To learn more about Base Substitutions Mutations click here:
https://brainly.com/question/15132400
why would the green part of a variegated test positive when treated with iodine solution?
Answers
Variegated leaves have green parts (where the cells contain chlorophyll) and white parts (where there is no chlorophyll). Only the parts that were green become blue/black with iodine solution, showing the importance of chlorophyll in photosynthesis. ... This is evidence that chlorophyll is required for photosynthesis.
when placed in a glucose solution, yeast cells will produce bubbles. which process are the yeast cells carrying out? A. chemosynthesis B. respiration C. photosynthesis D. transpiration
Answers
Answer:
B. respiration
Explanation:
There's a Quizlet called "Biology 1st 9 weeks review" (it's created by Rodgerst4) that helped me!The bubbles produced when yeast cells are placed in a glucose solution is because the yeast cells are carrying out respiration. The correction option would be B.
Yeast cells are able to carry out a type of respiration known as anaerobic respiration when placed in a suitable substrate medium like glucose. During this process energy in the form of ATP is generated in the absence of oxygen for the metabolism of the yeast cells. The equation of the reaction is as follows:
[tex]C_6H_1_2O_6 --->2 C_2H_5OH + 2 CO_2[/tex]
Thus, the carbon dioxide gas is released as bubbles in the solution as a result of respiration.
More on anaerobic respiration can be found here: https://brainly.com/question/12605249
8) please match the blanks with the following options. thanks.
a) 150
b) 100 cc
c) 1000
d) 100
e) 50
f) 800 cc
g) 850 cc
h) 1500 cc
The modern human brain is about_______in size and can hold about_______billion neurons. The Homo erectus' brain was about_______in size and held about_______billion neurons.
Answers
Answer:
about_______in size and can hold about_______billion neurons. The Homo erectus' brain was about_______in size and held about_______billion neurons.
Answer:
1500 cc
100
850 cc
50Explanation:
The modern human brain is about 1500cc in size and can hold about 100 billion neurons. The Homo erectus' brain was about 850cc in size and held about 50 billion neurons.
There are 5 structures that every cell has which of the following is not one of those structures
Answers
Answer:the 3 one
Explanation:
Which chemical is released by 2
WBC's that produces a non-specific inflammatory response?
Answers
Answer:
inflammatory cytokines
Explanation:
In host cellular defense systems, non-specific immune responses are integral. It is a general white blood cell-mediated reaction where cells respond quickly to pathogenic infiltration.
Here, receptors on cells detect or even respond to signals from damaged, injured or stressed cells- these signals, such as inflammatory cytokines in a cytokine storm of molecules, in response to signatures shared by a wide range of pathogens.
Which best describes plant classification?
Nonvascular plants are grouped into seedless and seeded plants.
Seedless plants are grouped into gymnosperms and angiosperms.
Gymnosperms are grouped into monocots and dicots.
Angiosperms are grouped into monocots and dicots.
Answers
Answer:
D
Explanation:
Why doesn't the glassblower tell the truth to the wizard?
Answers
These types of trees have their leaves modified into needles to help
reduce water loss?
Answers
Answer:
Coniferous trees
Explanation:
They are mainly found in cold regions
Men who are kidnapped for human trafficking are usually held under debt bondage or _____.
soldiering
peonage
sex slavery
sex tourism
Answers
Answer:
It is Soldering not peonage
Explanation:
Peonage is what they do for Men not young boys.
Men who are kidnapped for human trafficking are usually held under debt bondage or peonage. Option B. This is further explained below.
What is peonage?Generally, Men who are kidnapped for human trafficking are frequently held hostage.
In conclusion, peonage defines Men who are kidnapped for human trafficking.
Read more about Humans
https://brainly.com/question/18540902
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Plz help me its only 1 question
Answers
Answer:
I think the awnser is C because before it goes into to the plant that eats nitrogen there is a bigger amount of it
Explanation:
Brainliest Please
PLEASE HELP ASAP!!!!!
Which of the following is an example of haploid cells? cardiac cells nerve cells gametes muscle cells
Answers
Answer:
Gametes is an example of haploid cells.
Explanation:
Haploid cells are cells that contain a single complete set of chromosomes. Haploid cells in humans and other mammals, are usually the sex cells (egg and sperms) which are also called gametes that are produced during meiosis (a type of cell division). When the egg is fertilized by a sperm, it produces a diploid cell. Gametes contain 23 chromosomes in humans.
What is a disadvantage of asexual reproduction?
Answers
Answer:
Asexually reproduced offspring would have no genetic variation from the parent, being a perfect copy. This makes it so there is no genetic variation and disease would easily spread, since there would be no chance of an immunity gene showing up.
RER makes what for the cell?
Answers
Answer:
The endoplasmic reticulum can either be smooth or rough, and in general its function is to produce proteins for the rest of the cell to function. The rough endoplasmic reticulum has on it ribosomes, which are small, round organelles whose function it is to make those proteins.
Explanation:
Why is cellular respiration called an aerobic process?
What are the products and the reactants for cellular respiration?
Where is most of the ATP made during cellular respiration?
What must happen in the cell’s cytoplasm before cellular respiration?
What process happens within the mitochondria as part of cellular respiration?
Answers
Answer:
1. cellular respiration called an aerobic process because it requires oxygen
2. products: Carbon dioxide, water, and ATP reactants:Glucose and oxygen
3. I don't know
4. I don't know
I hope i helped somewhat :)
NEED HELP ASAP !!!!
John and Jake are twins. John became a famous artist and lived to be 90
years old. His brother, Jake, was unemployed most of his adult life and died
of a drug overdose at age 35. This is an example of how development is:
A. lifelong.
B. multidimensional.
C. multidirectional.
O D. pliable.
Answers
Answer: D PLIABLE!!
Explanation: took quiz
How is free water different from solute bound water (the key concept)?
Answers
Answer:
Water that can be extracted easily from foods by squeezing or cutting or pressing is known as free water, whereas water that cannot be extracted easily is termed as bound water.
Simulate a 24-hour day (12 hours of light, 12 hours of dark). How many snails and plants do you need to keep a stable environment? Explain any discoveries you make. This simulation is for Gizmo.
Answers
Answer:
One snail for two plants.
Explanation:
One snail and two plants we need to keep a stable environment because the snails help to clean up garden debris by feeding on them and their feaces has nitrogenous nature which is nutritive for the plants. So the plants get nutrients from the snail as well as carbondioxide gas used by the plants for the process of photosynthesis. So we can say that snails are important for maintaining a stable environment.
Gizmo technology helps build up an understanding of challenges and helps in developing interests.
For a stable environment, we will require one snail for two plants.
Snails are a very important part of nature as they balance the environment and the food web.
Snails feed on plants and dead decaying matter. That helps in keeping a balance.
The excretory waste from snails is nitrogenous in nature and aid in plant nutrition.
Hence, the plant can get nitrogen from Snails faeces, and also carbon dioxide required for the metabolic processes.
To learn more about Snails follow the given link:
https://brainly.com/question/17918864
a. Review What are the major elements of life?
b. Relate Cause and Effect What properties of
carbon explain carbon's ability to form different
large and complex structures?
a. Review Name four groups of organic compounds
foundin living things.
b. Explain Describe at least one function of each
group of organic compounds.
c. Infer Why are proteins considered polymers but
lipids are not?
Answers
Answer:
1. The major elements of life are Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus and Sulfur.
2. Its ability to catenate; its ability to form bonds easily with other elements such as hydrogen, oxygen and nitrogen; its ability to form single, double and triple.
3. Carbohydrates, Proteins, Lipids, and Nucleic acids
4. Carbohydrate provide energy; Proteins serve as structural elements;
Lipids serve as structural components of membranes;
Nucleic acids store and transmit genetic information
5. Proteins are considered polymers while Lipids are not because proteins are composed of monomeric subunits of amino acids whereas lipids do not have monomeric subunits.
Explanation:
1. The major elements of life are Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus and Sulfur as they are found in many structures of living organisms- in proteins, carbohydrates, nucleic acids and lipids.
2. Carbon has the ability to form different large and complex structures because:
(I) its ability to catenate which is the ability to combine with one another to form straight, branched chain or ring compounds containing many carbon atoms.
(ii) carbon can form single, double and triple with itself and other life elements.
(iii) the relative stability of the covalent bonds formed by carbon.
3. Four groups of organic compounds found in living things are Carbohydrates, Proteins, Lipids, and Nucleic acids.
4. Carbohydrate provide energy; Proteins serve as structural elements;
Lipids serve as structural components of membranes;
Nucleic acids store and transmit genetic information
5. Polymers are large molecular weight compounds built up from subunits called monomers.
Proteins are considered polymers because they are large molecular weight molecules composed of monomeric subunits of amino acids.
Lipids are not considered polymers because individually, they are not very large molecules and do not have monomeric subunits rather are composed of long fatty acids chains linked to a glycerol molecule.
Which element is not found on most main sequence stars?
Answers
Answer:
Nitrogen is the right answer.
Can Plastic Waste Degrade Into The Soil?
Yes or no and explain
Answers
Answer:
Yes, but the process is too slow
Explanation:
We pack almost everything in this material and plastic has become a very normal occurrence in the modern world. Each year, people used 1.6 million barrels of oil just to make plastic bottles.
On the other hand, nature takes about 1000 years to develop a single plastic object, while plastic material takes about 240 years.
What can hold more data?
1. DVD
2. CD
Answers
Answer:
DVDs hold about 6 times more data than CDs
Explanation:
I'm 100% sure
Answer:
2
Explanation:
take my word on It.
i need help with 5-10 please
Answers
Answer:
5. C. C6H12O6 + O2 ➡️CO2 + 02 + ATP
6. D. It breaks down glucose to form ATP.
7. D. All autotrophs are producers
8. D. All 4 statements are correct.
9. False
10. False
Explanation:
The process of photosynthesis converts carbon dioxide and water into glucose and oxygen while the in the process of cellular respiration, glucose and oxygen are converted to water and carbon dioxide and ATP is formed.
In photosynthesis, glucose is formed while in cellular respiration ATP is formed. The process of forming ATP and glucose are ways in which energy is cycled and oxygen cycle occur in the atmosphere. Energy can not be recycled but it is rather used. Only green plants carry out photosynthesis. Autotrophs are known to be primary producers.