Molecules of oxygen and carbon dioxide pass through the membrane via diffusion. However, polar molecules cannot easily pass through the lipid bilayer. They can reach the hydrophobic surface, but can't pass through the lipid layer to the other side of the membrane.
PLEASE MARK ME AS BRAINLIEST
Which of the following events may be a result of a new, fatal disease that affects only senior citizens
Answer:
an increase in the death rate of post-reproductive individuals
Explanation: I hope this helps
How does being close to the ocean keeps the cities near it cool?
Answer:
I guess the ocean breeze
9. In one or two sentences, describe how the available energy may affect the population sizes of organisms at different
trophic levels
Answer:
Explanation:
In food web energy are been transfered from the producer which are often plants down to the last individual on the web.
Each individual takes in and expels the remaining to the next until it is distributed to all. The amount of energy received from the producer will determine the amount of energy that will be available for others to share, when enough energy is transferred they all have enough to share but when the energy level is low the individual on the web also receive a low energy this may affect the population leading to a reduction,
It can also lead to competition among the organisms,migration out of environment to search for food. But When the energy level is high or on the increase it leads to growth and development among the organism.
What would be the outcome of the processes shown below if the mRNA never moved outside
of the nucleus?
Answer:
Translation is the process of protein synthesis in which the genetic information encoded in mRNA is translated into a sequence of amino acids in a polypeptide chain
Ribosomes bind to mRNA in the cell's cytoplasm and move along the mRNA molecule in a 5' - 3' direction until it reaches a start codon (AUG)
Anticodons on tRNA molecules align opposite appropriate codons according to complementary base pairing (e.g. UAC will align with AUG)
Each tRNA molecule carries a specific amino acid (according to the genetic code)
Ribosomes catalyse the formation of peptide bonds between adjacent amino acids (via a condensation reaction)
The ribosome moves along the mRNA molecule synthesising a polypeptide chain until it reaches a stop codon, at this point translation stops and the polypeptide chain is released
Explanation:
The process of protein synthesis initiates with the transcription process in the nucleus and continues with the translation process in the cytoplasm. If the mRNA never left the nucleus, the translation would not be possible.
-------------------------------------
The protein synthesis process involves transcription and translation.
Transcription:
Transcription is the copying process of the DNA section for the desired protein occurs.It happens in the nucleus, where the template DNI strand is read in direction 3´→ 5´ to build the mRNA molecule in direction 5´→ 3´.Once the transcription is over, the new mRNA molecule leaves the nucleus and goes to the cytoplasm.
Translation:
Translation occurs in the cytoplasm when mRNA meets a ribosome. rRNA and tRNA read mRNA in the direction 5´→ 3´ to build the protein. While the ribosome reads mRNA strain from its 5´ extreme to 3´, tRNA adds the correct amino acids to build the polypeptide. Protein growth initiates in the AUG start codon -Metionin-, and ends when reaching either of the stop codons UAA, UAG, UGA.
If the mRNA does not move outside of the nucleus, the translation process is not possible. Only transcription would occur, but no translation. Protein synthesis could not be accomplished.
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1. In Model 1 a pathogen (virus, bacteria, foreign protein, parasite) has entered the bloodstream ofan individual. Describe the symbol that represents the pathogen.
And if possible answer #3, I will mark brainiest
Complete question:
1. In Model 1 a pathogen (virus, bacteria, foreign protein, parasite) has entered the bloodstream of an individual. Describe the symbol that represents the pathogen.
3. Another type of white blood cell that is involved in the cell-mediated response is a helper T-cell.
a. Draw the symbol that represents the helper T-cell in Model 1.
b. In your drawing above, circle the specialized surface proteins on the helper T-cell.
Answer:
1. The pathogen is the one with the "star-like" symbol
3. a) The helper T-cell is represented like a Circle with the Th wrote inside.
b) The surface protein on the Th cell is the symbol that looks like this ⊥
or T Th cells.
Note: All the symbols are shown in the attached file.
Explanation:
Pathogens: These are invading the bloodstream, so you can see them among the white cells, and too many of them. Macrophages are one of the different types of white globules involved in the organism's defense against strange substances and pathogen agents. These cells are the principal actors in the immune response. Macrophages are the principal phagocytes of tissues, capable of recognizing different strange molecules that penetrate the organism, such as bacterias, parasites, and viruses. Macrophages phagocyte these substances and eliminate them, a process known as phagocytosis. Macrophages also have the capability of inducing an adaptative immune response. Macrophages show the antigens on their surfaces where they are recognized by lymphocytes.Helper T-cell: T-Lymphocytes are in charge of the regulation of the immune system. T-cells are the helper cells that coordinate the initial response in front of the pathogen. There are three types of helper T-cells: TH1 (lymphocyte T helper), TH2, and TH17. TH1 cells are highly effective during the elimination of intracellular pathogens.Help ASAP
Using a microscope a student observes small circular cells that have a cell wall but no nucleus have based on their observations how would the student classify the cells A bacteria B protist C plant D animal
How are genes passed from parent to offspring?
Answer:
Explanation:
A sperm and an egg each contain one set of 23 chromosomes. When the sperm fertilizes the egg, two copies of each chromosome are present (and therefore two copies of each gene), and so an embryo forms.
What apparatus did Priestly use to reach
his conclusions?
A. triple beam balance
B. bell jar
C. microscope
Please help, 10 points
Answer:
The answer is B. Bell Jar
What would happen to an organism if mitosis did not occur? Check all that apply.
The organism would not be affected.
The organism would not grow.
If an organism were cut or burned, the damaged area would not heal.
The organism would not produce new cells.
Answer:
The organism would not grow.
If an organism were cut or burned, the damaged area would not heal.
The organism would not produce new cells.
Explanation:
Answer:
B-The organism would not grow.
C-If an organism were cut or burned, the damaged area would not heal.
D-The organism would not produce new cells.
Explanation:
i just did it
What are the inputs and outputs of photosynthesis?
Pls, help ASAP!
A cyclist rode at an average speed of 15 mph for 30 miles. How long was the ride?
A) 2 hours
B) 1 hour
C) 0.5 hours
D) 3 hours
Answer:
A. 2 hrs
Hope This Helps!
Answer:
2hrs
Explanation:
Which organisms inhaled CO2 and exhaled 02 to 100s of millions of years, increasing the amount of O2 in the atmosphere?
Answer:
Plants
Explanation:
Plants 'inhale' CO2 and 'exhale' O2.
3.3x10^34 convert molecules to moles
Answer:
5.5 × 10¹⁰ moles
General Formulas and Concepts:
Chemistry - Atomic Structure
Using Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:
Step 1: Define
3.3 × 10³⁴ molecules
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
[tex]3.3 \cdot 10^{34} \ molecules(\frac{1 \ mole}{6.022 \cdot 10^{23} \ molecules} )[/tex] = 5.47991 × 10¹⁰ moles
Step 4: Check
We are given 2 sig figs. Follow sig fig rules and round.
5.47991 × 10¹⁰ moles ≈ 5.5 × 10¹⁰ moles
If you were making a product of artificial "Grow-Lites" for plants, what color light should
they emit so that plants can do photosynthesis (make sugars) most effectively?
Answer:
-blue and red light
Explanation:
Plants produce sugars or carbohydrates during the process of photosynthesis. They absorb light energy from the electromagnetic spectrum with pigments within the thylakoid membrane, like chlorophyll a, chlorophyll b.
Chlorophylls are made of ringed molecules chlorine, a hydrogenated form of porphyrin with a magnesium ion bonded to four atoms of nitrogen. Chlorophyll a shows the most absorption of red light (642 nm) and blue light (372 nm); while chlorophyll b shows the most absorption at 626 nm and 392 nm.
Different types of chlorophyll sidechains change the molecules' absorption ranges; A's methyl group is bound at carbon 7, B's aldehyde (CHO) ring is bound at carbon 7. Both absorb light from orange-red and violet-blue wavelengths. As such, the best light wavelengths for photosynthesis are within the blue and red wavelengths (425–450 nm) and (600–700 nm).
HELPPP PLEASE ASAP!!!!!! Which of the following best describes positive feedback?
A) It causes an effector to signal the control center, which creates the stimulus to make a response.
B) It amplifies a change in a given condition by signaling for a response that increases that change.
C) It produces a response by increasing the set point in the organism’s metabolism.
D) It promotes decreases, rather than increases, in an organism’s metabolism.
Answer:
I think it was b
Explanation:
why do i think this because i have seen it everywhere im about to take the test and i will commet before someone else gets it wrong too.
How does the spread of an airborne pathogen compare to the spread of foodborne and person-to-person pathogens
Answer:
You must come in contact with the infected air. It spreads slower, and more than one person is usually affected at the same time.
Explanation:
A solution with a hydroxide (OH-) ion concentration greater than water would be a?
A) acid
B) base
C) neutral
D) ion
Answer:
B) base
Step-by-step explanation:
Acids have a higher concentration of hydrogen ions. Bases have a higher concentration of hydroxide ions.
contrast cellular respiration and fermentation and explain which process is more efficient. why do your body's cells use fermentation during intense exercise?
Answer:
Cellular respiration produces 38Atp while fermentation produces 2 Atp, that being said Cellular respiration is more efficient than fermentation in the generation of ATP.
Explanation:
in fermentation, glucose reacts in the absence of oxygen to produce ATP. Cellular respiration is the more efficient process because it produces much more ATP from each glucose molecule than does fermentation. the body's cells use fermentation during intense exercise because their oxygen supply is limited
Place the Levels of organization in hierachical order from smallest to largest
1. Cells
2. Tissues
3. Organs
4. Atoms
5. Molecules
6. Organisms
7 Organelles
Answer:
The major levels of organization in the body, from the simplest to the most complex are: atoms, molecules, organelles, cells, tissues, organs, organ systems, and the human organism.
Explanation:
Hope this helps you!!!
Cocci bacteria are atrichous?
Answer:
Yes
Explanation:
A) Atrichous is ur answer.. Since cocci bacteria are those bacteria which are oval or spherical in shape.
The three components of RNA are a phosphate group, ribose sugar, and a nitrogenous base
How are the base pairs different?
Answer:
The nitrogenous bases Adenine (A), pairs with uracil (U), while guanine (G) and cytosine (C) pair up.
Explanation:
Nucleotides are monomers that make up DNA and RNA- these are nucleic acids that function as storage, transport and messenger molecules for encoding proteins. Nucleotides contain a 5-carbon deoxyribose (with hydroxyl modifications) or ribose sugar (RNA), phosphate and one of four nitrogenous bases:
Adenine (A)
Guanine (G)
Cytosine (C)
Thymine (T).- DNA only
Uracil (U) found in RNA
Nucleotide monomers derive their names from their bases. Nucleic acid polymers form on a single strand through covalent bonding. This occurs between two nucleotides in an esterification reaction where a phosphodiester bond is formed.
Nitrogenous bases encourage hydrogen bonding, and resulting base pair formation. Adenine (A), pairs with uracil (U), while guanine (G) and cytosine (C) pair up.
pros and cons of penguins in huddles
Answer:
Pro: Warmeth for the cold
Con: Big dinner for predators
Which of the following would affect the function of an enzyme?
a.
all of these
c.
different substrates
b.
temperature
d.
pH
TEMPURATURE:
Raising temperature generally speeds up a reaction, and lowering temperature slows down a reaction. However, extreme high temperatures can cause an enzyme to lose its shape (denature) and stop working.
pH:
Each enzyme has an optimum pH range. Changing the pH outside of this range will slow enzyme activity. Extreme pH values can cause enzymes to denature.
DIFFERENT SUBSTRATES:
Increasing substrate concentration also increases the rate of reaction to a certain point. Once all of the enzymes have bound, any substrate increase will have no effect on the rate of reaction, as the available enzymes will be saturated and working at their maximum rate.
I got these explanations from khan academy :)
Which statement about the cell membrane is true?
It contains cellulose and sugars that are involved in communication.
It is present in animal cells only.
It is rigid and elastic for supporting the cell’s shape.
It prevents harmful substances from entering a cell.
Answer:
D
Explanation:
answer these questions ill give you a Brainliest
1. What is matter made of?
2. Define matter.
3. Give 3 examples of things that are made of matter.
4. What is the difference between solid, liquid, and gas?
5. What is a chemical reaction?
6. Explain the difference between the reactants and products.
7. Do you have any plans for Halloween and the break?
If enzymes are made up of proteins, then can proteins be considered as monomers to enzymes?
Answer:
no
Explanation:
just no............
how does a mitochondria help a cell get the materials it needs
Answer:
Known as the “powerhouses of the cell,” mitochondria produce the energy necessary for the cell's survival and functioning.Mitochondria break down glucose into an energy molecule.
Answer:They convert energy stored in organic compounds into a usuable form.
What is the effect of paraquat on ATP, NADPH,
and sugar?
Answer:
ATP will increase
NADPH will decrease
Sugar will decrease
Explanation:
Trust, and I just got this answer
The effect of paraquat on ATP, NADPH, and sugar includes the fact that ATP will increase, NADPH will decrease, and sugar will reduce.
Paraquat is also referred to as methyl viologen. It's a toxic chemical which is used as an herbicide for grass and weed control.
Paraquat can cause damage to one's health when it comes into contact with one's mouth or intestines.
It should be noted that biochemical changes that are caused by paraquat in the lungs will lead to rapid and prolonged oxidation of the NADPH. This then leads to the reduction in NADPH as it attempts to detoxify the lipid hydroperoxides. Also, paraquat will lead to an increase in ATP and a reduction in sugar levels too.
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Which is the proper order of structures that contact the substances removed from the blood?
nephron → urethra → bladder → ureter
urethra → ureter → bladder → nephron
nephron → ureter → bladder → urethra
urethra → bladder → ureter → nephron
Answer:
nephron → ureter → bladder → urethra
Answer:
nephron → ureter → bladder → urethra
Explanation:
The nephron, a functioning unit of the kidney, filters blood and is where urine is produced. Once there is urine, it empties into the ureter, a tube from the kidney to the bladder. The urine is then temporarily stored in the bladder until the body is ready to excrete the urine through another tube called the urethra.
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1. Which of the following is a characteristic associated with an organism's niche but not with its habitat?
a climate
b . soil quality
c. place in the food web
d.location within the ecosystem
Answer: it most likely c
Explanation: