Active transport occurs against the electrochemical gradient. It needs energy to move molecules from the lower concentration side to the higher concentration side. The mode of transport is active transport.
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There are three main different types of transport across the membrane
Simple diffusion ⇒ Does not need energy to occurFacilitated transport ⇒ Does not need energy to occurActive transport ⇒ Needs energy to occurActive transport is the transport of molecules that move against the electrochemical gradient, so it does need energy to happen.
Molecules move from the lower concentration side to the higher concentration side of the membrane.
Carrier proteins are in charge of active transport. The needed energy might proceed from the ATP molecules or the membrane's electric potential.
In the exposed example, a scientist wants to determine how substance L enters a cells in a culture.
The cells maintain a 120 mM intracellular concentration of substance L. Varying external concentrations of substance L (10 to 100 mM) in culture medium (Table 1).Table 1. Rate of entry of substance L into mammalian cells in culture
External concentration of substance(mM) Rate of entry of substance L
10 5%
20 25%
30 45%
40 65%
50 80%
60 90%
70 95%
80 100%
90 100%
100 100%
Now, we need to identify the most likely mode of transport across the membrane for substance L, and explain how information provided helps determine the most likely mode of transport.
We know that the intracellular concentration is 120mM.
As we can see, this concentration exceeds all of the culture media concentrations. Yet, the substance keep moving into the cell.
As the concentration inside the cell is always higher than the concentration outside, we can assume that this is not passive transport because the molecule transport is going against its concentration gradient.
Hence, the remaining option is active transport. And as said before, we can see it because the substance keeps crossing the membrane toward the cell interior despite its concentration being higher in the interior of the cell than in the exterior.
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if a single gene has 3 or more alternative forms, this is called
Hi there! Your answer is "multiple alleles."
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which part of the brain consolidates short-term memory into long-term memory?
The four main groups of macromolecules are carbohydrates, lipids, proteins. Identify each type of macromolecule based on its monomer.
Answer:
1) GLUCOSE is the monomer for CARBOHYDRATES
2) FATTY ACID & GLYCEROL is the monomer for LIPIDS
3) NUCLEOTIDE is the monomer for NUCLEIC ACIDS
4) AMINO ACID is the monomer for PROTEINS
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The function of the mitotic cell cycle is to produce daughter cells that __________.
a. have the same number of chromosomes as the parent cell but not the same genetic content.
b. have the same number of chromatids as the parent cell had chromosomes.
c. have a random assortment of maternal and paternal chromosomes.
d. are genetically identical to the parent cell (assuming no mutation has occurred).
e. have none of the listed characteristics.
Answer:
The answer is D.are genetically identical to the parent cell (assuming no mutation has occurred).
Explanation:
The function of the mitotic cell cycle is to produce daughter cells that __________.
the division results in the generation of two daughter cells that are genetically identical to the parent cells and each daughter cell contains the same number of chromosomes and all cell content inherited from the parent cell.
Which of the following describes what occurs during inhalation?
Answer:
c. Ribs move out- diaphragm contracts- lungs expand- decrease intrathoracic pressure
Explanation:
Answer:
c
Explanation:
which of these primate groups is most closely related to hominids?
Answer:
apes such as chimpanzees
which body system initiates the process of muscle contraction
Answer:
Nervous System
Explanation:
"Muscle contraction begins when the nervous system generates a signal. The signal, an impulse called an action potential, travels through a type of nerve cell called a motor neuron."
PLZ THIS IS URGENT HELP
Which of the following genetic crosses follows the Mendelian inheritance?
A) P generation: brown lab x black lab; F1 generation: yellow lab
B) P generation: A blood x B blood; F1 generation: AB blood
C) P generation: Red-eyed fly x Red-eyed fly; F1 generation: White- eyed fly
D) P generation: Widows peak x straight hair-line; F1 generation: Widows-peak
Explanation:
The key principles of Mendelian inheritance are summed up by Mendel's three laws: the Law of Independent Assortment, Law of Dominance, and Law of Segregation.
Poultry products are a likely source of infection by:
Poultry products are a likely source of infection by Salmonella enterica
which causes typhoid.
Most farm animals such as pigs, cattle and poultry have been found to be
infected with Salmonella enterica as a result of their contact and exposure
to a dirty environment.
This is why it is advisable to apply much heat on poultry products such as
eggs to kill the micro-organism.
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When heart rate increases what else increases?
Answer:
Your heart increase its stroke volume by pumping more forcefully or increasing the amount of blood that fills the left ventricle before it pumps. Generally speaking, your heart beats both faster and stronger to increase cardiac output during exercise.
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Miss Hawaii
when did hans and zacharias janssen contribute to the cell theory
what is the primary function of cellular respiration?
Answer:
Cellular respiration releases stored energy in glucose molecules and converts it into a form of energy that can be used by cells. Hope i helped
help me pls........
Take a look at the phylogenetic tree. Which two organisms on the tree would be expected to share the most characteristics?
O cnidarians and animals with bilateral symmetry
Ochoanoflagellates and cnidarians
O sac fungi and cnidarians
O amoebas and sponges
Answer:
first option and third option
Explanation:
pls give brainliest have a great day
Help this is due in an hour….
Answer:
I'm sure it's A
Explanation:
14. What are the two compartments of the forearm and how do they differ?
Answer:
The anterior compartment is known as the flexor compartment since the muscles primarily function to flex the wrist and digits. The anterior compartment consists of a deep and superficial layer. The superficial compartment contains the pronator teres, the flexor carpi radialis, and the flexor carpi ulnaris.
How were ozone levels monitored in 1920?
Answer:
I don't know
Explanation:
Sorry.. I really don't know
..
.
Help you later
Ozone levels in 1920 were primarily monitored using chemical methods, such as the use of chemical indicators and colorimetric analysis.
Potassium iodide-starch paper was used to detect ozone. When exposed to ozone, these indicators changed colour, letting researchers visually monitor ozone concentration.
Colorimetric analysis was also used. Chemical reagents reacting with ozone changed colour. Ozone concentration connected with colour change intensity. Chemical approaches measured ozone qualitatively or semi-quantitatively. They were easy to use but less precise than modern monitoring approaches.
In the following decades, spectrophotometry and ozone analyzers improved the systematic monitoring and quantitative measurement of ozone levels. These improvements made atmospheric ozone monitoring more precise.
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how long does uncooked ground beef last in the fridge
Answer: 2-4 days
hope this helps
pls give brainliest. thank you
Keyori is making a model to illustrate the functions of ADP and ATP in photosynthesis. Which model best illustrates the role of ATP in photosynthesis?
A power plant that generates energy
A rechargeable battery that stores and releases energy
A pigment that receives the energy of sunlight
A hammer that helps break apart water molecules
Answer:
A. po
Explanation:
kadi i dont know sorry
True or false? The effectiveness of an exchange surface is increased if there is a long diffusion path.
Answer:
True
Explanation:
The Long and Diffusion Path can Help the exchange surface to increased rapidly in a long diffusion path. in other words it grows faster.
If the diffusion path is long, the effectiveness of an exchange surface is improved is false.
What is diffusion?Diffusion is defined as the net movement from an area of higher concentration to an area of lower concentration caused on by the dispersal of any material's in-solution or gas-particle particles.
Diffusion is the process by which dissolved chemicals enter or exit cells.
What are the parameters that affect the diffusion?the three parameters that affect diffusion are
The concentration gradient. temperature.length of diffusion pathway.the membrane's surface area.The rate of diffusion increases with the magnitude of the concentration gradientThe rate of diffusion will increase as the temperature rises.Diffusion will occur at a faster rate if one cell membrane is larger than another.How may an exchange surface's effectiveness be enhanced?a wide surface area. a thin membrane to offer a short diffusion pathway. an effective blood supply.ventilation of the animals.learn more about diffusion here https://brainly.com/question/2135861
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What do adenine, ctyosine, guanine, thymine, and uracil have in common
Adenine and guanine have a fused-ring skeletal structure derived of purine, hence they are called purine bases. ... Similarly, the simple-ring structure of cytosine, uracil, and thymine is derived of pyrimidine, so those three bases are called the pyrimidine bases.
Help i think its either C or B but i don't know please correct me if i'm wrong.
Why is the region bordering the Pacific plate called the "Ring of Fire"?
A) The islands within the Pacific Ocean form a circle from volcanic activity.
B) The Pacific Ocean is a region where climate change has resulted in the highest temperatures.
C)The boundary along the Pacific plate contains most of the active volcanoes on Earth.
D) The Pacific plate forms a ring where wildfires are likely to occur.
Answer:
B
Explanation:
The answer is B
WHAT IS MEDIAN??????????????
Answer:
The middle value in a set of numbers arranged in increasing order. If there is an even number of values, then median is the average of the middle two values.
In anatomy (as your question is marked Biology), the median is situated in the middle; central, intermediate.
For many generations, the flowers in a meadow have been pollinated by a particular species of honeybee. One year, a new species of
honeybee moves to the meadow. This new species pollinates the same flowers as the old species. Which description best predicts
what would happen if a new species of honeybee moves into a meadow that was already occupied by a particular honeybee that
pollinated the meadow?
Answer:
By the process of mating there will be again undesirable species (hybird) and the particular honey bee might get extinct.
There will be imbalance in ecosystem if a new species of honey bees moves into a meadow that was already occupied by a particular homey bees.
What helps weaken atp bonds so energy can be released and then later help reform them?
Enzymes help weaken these bonds so energy can be released and then later help reform them.
that's the answer
ADP (adenosine diphosphate) is formed when these high-energy connections between the phosphate groups at the end are broken, releasing energy for the cells to utilize.
How is energy stored in ATP?One phosphate group is left on its own, these powerful associations may be broken and rebuilt with the aid of enzymes.
When a third phosphate is added to the ADP molecule, reforming ATP, water that was broken down into its hydrogen atom and hydroxyl group during ATP hydrolysis is recovered.
Energy must be introduced into the system to regenerate ATP, ADP develops and energy is released for the cells to utilize when these connections are broken.
Therefore, ATP has the capacity to store and transmit chemical energy, high-energy bonds are used to link the final two phosphate groups.
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discuss the functions and deficiency symptoms of phosphorus
Answer:
Functions of phosphorus in the body,
i) Formation of bones and teeth. It's a component necessary for forming strong bones and teeth in the body.
ii) It's important in helping to make protein in the body for growth. Since many proteins in the body are phosphorylated for regulating their functions.
iii) Activation of enzymes. This done through phosphorylation.
iv) Gene transcription. It provides structural importance to the gene and protein binding is by the presence of phosphorus.
Deficiency of phosphorus in the body;
i) Weak and fragile bones.
ii) Bone pain.
iii) Fragile teeth.
iv) Stiff joints.
When methane (CH4) combines with oxygen (O2), carbon
dioxide (CO2) and water vapor (H20) are produced.
Which equation represents this chemical reaction?
O A. CO2 + CH4 + 2H20 + 202
OB. CO2 + 2H20 – 202 + CH4
OC. CH4 + 202 – CO2 + 2H20
OD. CH4 + 2H20 - 202 + CO2
Answer:
C. CH4 + 202 – CO2 + 2H20
Explanation:
CH4+O2-CO2+H20
The above equation represents combustion of methane to produce carbon-dioxide and water.
One carbon atom is present on the reactant side as well as on the product side. Four hydrogen atoms are present on the reactant side and two hydrogen atoms on product side. In order to balance this equation, we would multiply water molecule by two. Now there are four atoms of oxygen in the product side but only two on reactant side, so we will multiply oxygen molecule by two on the reactant side. Now the equation is balanced.
The balanced chemical equation is:
CH4+202-CO2+2H2O
This equation obeys the law of conservation of mass as the mass of the reactants is same as that of the products.
Answer:
C. CH4 + 202 – CO2 + 2H20
Explanation:
The greater and lesser trochanter are located on which bone?
Answer:
d. Femur
Explanation:
Answer:
femur good job bro
Explanation:
What are latent prints?
Explanation:
Latent prints are formed when the body’s natural oils and sweat on the skin are deposited onto another surface. For example if you put your thumb on your glass you will see that the oils will put your fingerprint there
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How can you explain the relationship of the following components within the cell: nucleus DNA, chromosomes, and genes?
Answer: DNA is found in every cell of our body– except red blood cells (no nucleus). Genes are a segment of DNA. Our genes are the blueprint for our biology.
Explanation:
Explain why the shape of an enzyme is important to its function.
Answer:
The shape of an enzyme is very important because it has a direct effect on how it catalyzes a reaction.
Each enzyme is folded into a shape that allows the substrate(s) to fit into the active site, which is where the reaction occours. Other substrates do not fit into this active site. This is why each enzyme can only catalyse a specific reaction
Answer:
hey
how is the weather that side