Explanation:
Membranes
Recall that phospholipids have a hydrophobic end and a hydrophilic end and that when placed in water they will orient themselves accordingly (5.11 pg 79). This is the basis for the plasma membrane of a cell. The cell membrane consists of a phospholipid bilayer with embedded proteins. We refer to the modern conceptual model of the cell membrane as the "fluid mosaic" model since the phospholipids are able to move about across the surface of the membrane (fluid) and the proteins are many and varied (mosaic) (5.12).
Attached to the some proteins and to some of the phospholipids are oligosaccharides (short polysaccharides). When a protein has an oligosaccharide attached it is called a glycoprotein. Glycolipids are phospholipids with the sugar chains added. These oligosaccharides are found on the outside of the membrane and are used in cell to cell recognition. They differ among species, among individuals and within individuals.
Membrane proteins can have a number of functions, such as transport proteins, enzymes (more on these shortly), receptor sites, cell adhesion, attachment to the cytoskeleton. (5.13)
The most important thing about membranes is that they regulate what moves in and out of a cell. The membrane is selectively permeable because substances do not cross it indiscriminately.
Some molecules, such as hydrocarbons and oxygen can cross the membrane. Many large molecules (such as glucose and other sugars) cannot. Water can pass through between the lipids. Ions such as H+ or Na+ cannot.
Transport proteins make passage possible for molecules and ions that would not be able to pass through a plain phospholipid bilayer. Some transport proteins have a hydrophilic tunnel through them which allows polar molecule or ions to pass. Others actually bind to the molecules and move them across the membrane. In either case transport proteins are very specific.
Passive Transport
Suppose the stereocilia of one hair cell become permanently bent toward the kinocilium. What will most likely happen as a consequence
Answer:The options are not given, here are the options from another website.
a. A single pitch will be constantly perceived
B. A single pitch will no longer be perceivable
c. A or B depending on the hair cell's location
d. A or B depending on the bending's direction.
The correct option is d.
A or B depending on the bending's direction
Explanation:
This is because stereocilia are normal bent where there is a shearing force that occur when there is a up and down movements of the basilar membrane . When stereocilia bend towards the kinocilium, it make it depolarizes the cell and lead to the afferent activity to rise up and when the stereocilia bend away from the kinocilium , it hyperpolarizes the cell and lead to a reduction in afferent activity.
The consequences of this are that a single pitch will be noticed, or no pitch will be noticed. This will depend on the direction the stereocilia have bent.
We can come to this answer because:
Stereocilia are cellular accessories that help cells move around.They can curve up or down, generating different but very important effects.If the curvature is made towards the kinocilium, we can notice the formation of a pitch, as the cell becomes polarized.If the curvature is in the opposite direction to the kinocilium, the cell will be depolarized and it will not be possible to visualize the pitch.In this case, we can state that the consequences of the curvature of the stereocilia will depend on the side towards which this curvature is directed.
More information:
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state the role of light photosynthesis
Answer:
the role of light photosynthesis is to absorb the sunlight so the the photosynthesis can happen if there is no light, or sunlight them photosynthesis cannot happen, light I intensity is a very important role to photosynthesis
Explanation:
hope that helped
What is chlorophyll
Answer:
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⏩ Chlorophyll is the green pigment present in plants that helps in photosynthesis.
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# ➳ GuMiHo ࿐
HELP PLZZ!!! I WILL MARK YOU AS THE BRAINLESS ANSWER
Which of these conditions may prevent mold from growing?
A.
high humidity
B.
freezing temperatures
C.
warm temperatures
D.
low humidity
Sounds lower than what the human ear can sense are ultrasound True or false?
Answer:
True
Explanation:
we cannot hear ultrasound waves
Which climate does not have warm summers?
Please help ASAP
A continental
B tropical
C polar
D dry
Answer:
c
Explanation:
Answer:
Polar
-i think-
Explanation:
A couple wants a second child that is biologically related to them. They have been trying for five years. The wife is 45 years old and healthy, with no history of sexually transmitted diseases. Three rounds of artificial insemination with her husband's sperm have failed. There is no evidence of any problem with her husband's sperm count or motility. What would be the most likely next step
Answer:
they have to do it in a religious way HOW?they have tried it in a medical way but no answer.acoding to the question that is my answer
There is no evidence of any problem with her husband's sperm count or motility. In vitro fertilization using a donor egg and her husband's sperm.
What is Invitro fertilization ?In vitro fertilization (IVF) is an assistive reproductive technology (ART) which involve in retrieving eggs from a woman’s ovaries and fertilizing them with sperm.
This fertilized egg or embryo which can then be frozen for storage or transferred to a woman’s uterus, Infertility issues for which IVF necessary include reduced fertility in women over the age of 40, blocked or damaged fallopian tubes, reduced ovarian function, endometriosis.
For more details IVF, visit
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The digestive system contains a variety of parts that perform specific functions within the body. The small and large
intestines have some similarities and some differences. Which function is only performed in the small intestine?
O water absorption
O vitamin absorption
O mineral absorption
O production of chyme
Answer:
d
Explanation:
Answer: d
Explanation:
A population of 24000 has couples that have 2 babies. What is the number of babies?
Answer:12000 babies
Explanation: 24000/2 = 12000
PLZ HURRY
How does DNA fit inside the nucleus of a cell?
1. DNA is a short molecule
2. DNA is tightly coiled into chromosomes
3. only part of the DNA fits in the nucleus
4. each nucleus contains only one gene
Answer:
2
Explanation:
DNA is tightly packed up to fit in the nucleus of every cell. As shown in the animation, a DNA molecule wraps around histone proteins to form tight loops called nucleosomes. These nucleosomes coil and stack together to form fibers called chromatin
Answer:
DNA is tightly coiled into chromosomes
Explanation:
Other answer is correct
Suppose that leg length in the Halkan pogo-bouncer, a common insect on the planet Terran02, is determined by five loci, A, B, C, D and E. Pogo-bouncers with the genotype aabbccddee have legs that are 5 mm long; and those with the genotype AABBCCDDEE have legs that are 55 mm long. What is the leg length of our friendly pogo-bouncer whose genotype is AaBBCcDDEe
Answer:
The leg length of the individual whose genotype is AaBBCcDDEe equals 40mm.
Explanation:
Due to technical problems, you will find the complete explanation in the attached files
during photosynthesis,an energy transformation take place.which one of these happens during photosynthesis
Answer:
In a broader sense, photosynthesis, including CO2 anabolism, can be divided into several steps: i) photoelectric charge isolation using photon energy (conversion to electrical energy), ii) fixation of electrical energy in the form of chemical energy (ATP synthesis), and iii) chemical reactions involving ATP (fixation ..
Explanation:
Why are hurricanes considered more damaging than tornadoes when tornados have stronger winds?
a Hurricanes only strike coastlines while tornados strike coasts and inland.
ENBE
b.
Hurricanes also cause flooding and occur over a broader area.
Tornadoes move more slowly than hurricanes.
d
Tomadoes only occur inland, away from coastlines.
Answer:
B.
Explanation:
Why are hurricanes considered more damaging than tornadoes when tornados have stronger winds? ... Hurricanes also cause flooding and occur over a broader area.
WhiWhich of the following statements about traits is true?
A. All organisms within a population will have the sametraits.
B.A trait that is helpful in one environment will benefit organisms in all environments.
C. Organisms with helpful traits are more likely to survive and pass those traits on to their offspring.
D. An organism cannot have traits that would help it survive in environmental conditions that are different from the conditions of its habitat.
Answer:
C
Explanation:
Survival of the fittest
Answer:
I believe the correct answer is
C. Organisms with helpful traits are more likely to survive and pass those traits on to their offspring.
28. The model below shows what happens to chromosomes during a certain part of the cell cycle. Why
is this step in the cell cycle important for maintaining a functioning organism?
1 chromosome
1 chromosome
(before mitosis)
(after replication)
centromere
1 chromatid
per chromosome
2 chromatids
per chromosome
a. Each cell needs a complete set of organelles in order for the cell to work properly
b. Copying the DNA provides more instructions so the cell can work more efficiently
C. Each cell needs to receive a complete copy of the chromosomes in order for the cell to work
properly
yes
Answer:
C. Each cell needs to receive a complete copy of the chromosomes in order for the cell to work properly
Explanation:
The model in this question depicts the process of DNA replication, which is the process whereby an identical copy of DNA is made. Based on the model in the question, one (1) individual chromosome forms two (2) sister chromatids per chromosome. Each sister chromatid contains the replicated DNA.
This process is very important and must occur prior to any cell division because every cell needs to receive a complete copy of the chromosomes in order for the cell to work properly. For example, each human cell must receive 23 pairs of chromosome or 46 chromosomes in order to function well and this is ensured by DNA replication.
PLEASEE HELP ASAP!! ITS EASY!!! WILL MAKE YOU THE BRAINLIST!!!
What mechanism is responsible for the obvious signs of an intoxicated person?
muscle cells have been blocked by dopamine
nerve cells are not functioning at all
cells are prevented from releasing hormones and enzymes
nerve cells are not effectively communicating with muscle cells
Answer:
nerve cells are not effectively communicating with muscle cells
Why did land animals evolve back to aquatic environments?
Answer:
Life on Earth began in the water. So when the first animals moved onto land, they had to trade their fins for limbs, and their gills for lungs, the better to adapt to their new terrestrial environment. ... In air, eyes can see much farther than they can under water.Explanation:
Answer: Life on Earth began in the water. So when the first animals moved onto land, they had to trade their fins for limbs, and their gills for lungs, the better to adapt to their new terrestrial environment. ... In air, eyes can see much farther than they can under water. Tetrapods evolved from a group of organisms that, if they were alive today, we would call fish. They were aquatic and had scales and fleshy fins. ... Between 390 and 360 million years ago, the descendents of these organisms began to live in shallower waters, and eventually moved to land.
Explanation:
If a father is AA and a mother is AB, what is the probability for a child with AB blood? (Co-Dominance)
A 0%
B 25%
C 50%
D 75%
E 100%
Answer:
50% because there are two quantities
Explanation:
This means 1 out of 2
the fraction 1/2 = 50%
The theory of Copernicus contained six hypotheses:
The sun is at the _______ of the planets.
The Earth is ______ of the planets.
All the planets _______around the sun.
Each planet revolves around the sun in its own______ and at different _______
.
The moon______ around the Earth.
The stars are ______part of the solar system.
Answer:
The theory of Copernicus contained six hypotheses:
The sun is at the center of the planets.
The Earth is one of the planets.
All the planets orbit around the sun.
Each planet revolves around the sun in its own orbit and at different distances.
The moon orbits around the Earth.
The stars are not part of the solar system.
Explanation:
hope this helps :)
Define protein synthesis
Answer:Protein synthesis is the process in which cells make proteins
Explanation:
Protein synthesis is the process in which cells make proteins. It occurs in two stages: transcription and translation. Transcription is the transfer of genetic instructions in DNA to mRNA in the nucleus. It includes three steps: initiation, elongation, and termination
I need someone to help me by answering this questions....
sorry I don't know maybe I should try
The simple sugar in DNA is
O glucose
Deoxyribose
o
ribose
0
starch
Answer:
deoxyribose
Explanation:
answer above
Which process requires energy from food to help a cell maintain homeostasis?
A. a phosphate ion being released from ATP
B. a phosphate ion being added to ADP
C. the conversion of glucose to oxygen
D. the creation of RNA from DNA
Answer:
B
Explanation:
All igneous rock forms from cooling lava/magma, despite this, not all igneous rocks look the same. For example, some igneous rocks, like granite, have large crystals. The best explanation for this is
Answer:
depends on the mineral, metal, and compression content
Explanation:
without these variables we wouldnt have the different compositions and varieties of stones.
Help i need all 3 done
Answer and Explanation:
1. Transform
2. Convergent
3. Divergent
Sorry, it took me a while to add this but my mum wanted me for something..
After much research and DNA analysis, it has been determined that species in the same clade are actually more distantly related than originally thought. What is one way that the cladogram may change because of this information?
Answer:
Explanation: protein synthesis
Answer: b) A node would be introduced.
Which factor affects the climate of an area due to differences in specific heat?
Please help ASAP
A mountains
B large bodies of water
C latititude
D longitude
Answer:
c latititude
Explanation:
Latitude or distance from the equator – Temperatures drop the further an area is from the equator due to the curvature of the earth. In areas closer to the poles, sunlight has a larger area of atmosphere to pass through and the sun is at a lower angle in the sky.
What is an energy pyramid????
Answer:
From each trophic stage in an ecosystem, a pyramid of energy reflects how much energy, originally from the sun, is retained or deposited in the form of new biomass. Around 10% of the energy is typically passed from one trophic level to the next, preventing a large number of trophic levels from forming.
Explanation:
example:
Which characteristic could help you distinguish between types of fungi
Answer: The correct answer would be the spores made by the fungi.
The major phyla of the fungi are usually classified on the basis of characteristics of sexual structures.
For instance, the chytridiomycota produce zoospores, the blastocladiomycota undergo sporic meiosis, the ascomycota forms ascospores et cetera.
Fungi are mainly classified into seven phyla:
Microsporidia
Chytridiomycota
Blastocladiomycota
Neocallimastigomycota
Glomeromycota
Ascomycota
Basidiomycota
Hope I helped.
What happens if mutations are not corrected
Answer:
A mutation cannot be corrected and can either harm, benefit or be neutral in an organism
Explanation:
A common gene mutation could be Cancer, this is a highly severe gene mutation that can cause a multitude of complications to an organism when left untreated. Some mutations such as Heterochromia, an eye mutation causing two different colored eyes, cause no harm, but makes the organism look more unique.
Hope this helps!