biology middle School
Answer
answer 1
peptide binding
Each amino acid is linked to another amino acid by a covalent bond called a peptide bond. When two amino acids are covalently linked by a peptide bond, the carboxyl group of one amino acid combines with the amino group of the incoming amino acid, releasing a molecule of water.
Related questions
Comparison of the location of genetic material in eukaryotic and prokaryotic cells.
Answer
Answer and explanation:
Within eukaryotic cells, the genetic material is contained in the nucleus, a structure surrounded by a membrane. In fact, the word eukaryote means "true nucleus." In contrast, prokaryotic cells do not have a nucleus and their genetic material is dispersed—as if in a liquid state—in the cytoplasm.
What is the difference between amphibians and reptiles? A) Amphibians have a single-chambered heart.
B) Adult amphibians spend most of their time on land.
C) Amphibian hatchlings develop into fetal eggs.
D) Amphibians can use their skin for gas exchange.
Answer
Option D: amphibians can use their skin for gas exchange, it is a characteristic that distinguishes amphibians from reptiles.
explain:
Amphibians have moist, thin, mottled skin that is supplied by blood vessels on the surface. Moisture on the skin dissolves oxygen from the environment, and blood vessels absorb the oxygen. Special glands help amphibians keep their skin moist.
The very thick scales of reptiles prevent them from absorbing oxygen through their skin. Therefore, they breathe and breathe through their lungs.
Amphibians have a three-chambered heart. They do not develop embryos. Although adult amphibians spend most of their lives on land, they can only reproduce in water because they do not have an amniotic sac.
answer:
D) Amphibians can use their skin for gas exchange.
explain:
Unit tests in ed. 2020.
Cells require the introduction of molecules to carry out cellular processes. Typically, this requires the molecule to be transported across the cell membrane against a concentration gradient. How do these molecules enter the cell?
Answer
answer:
Active transport
explain:
Through active transport, the molecules necessary for cellular processes are transported against a concentration gradient using the energy released by the ATP molecule.
Active transport is mediated by proteins called carrier proteins, in which a conformational change occurs through phosphorylation or dephosphorylation, resulting in the transport of molecules against a concentration gradient.
The most common example of active transport is the transport of Na+ and K+ by the Na+-K+ ATPase. Active transport causes molecules to accumulate on one side of the cell membrane. Therefore, the correct answer to this question is active transport.
Compare and contrast aerobic and anaerobic respiration
Answer
Aerobic respiration requires oxygen for it to occur, while anaerobic respiration does not. Oxygen determines what product is produced. During aerobic respiration carbon dioxide, water and ATP are produced. During anaerobic respiration, lactic acid, ethanol, and ATP are produced. The similarity is that they both produce ATP.
organelle found in the cells of plants and algae where photosynthesis takes place
Answer
answer:
i think this is the answer
explain:
chloroplast. Chloroplasts are organelles found in plant cells and eukaryotic algae that perform photosynthesis.
When are peptide bonds formed during translation?
Answer
answer:
During the "elongation" or "middle phase" of translation, peptide bonds are formed.
explain:
We know that the translation process is divided into three steps or phases. Of these 3, during the elongation phase, the amino acids are transported by the tRNA to the ribosome, where they join to form a chain.
At this stage, the methionine-containing tRNA begins first in the middle groove of the ribosome, called the P site. Next to it, a new codon opens in another groove, called the A site. The A site will serve as a "landing site." for the next tRNA. When the matched tRNA reaches the A site, a peptide bond is formed. This peptide bond connects one amino acid to another. This step transfers the methionine from the first tRNA to the amino acid at the A site of the second tRNA.
Each skeletal muscle contains bundles of muscle fibers. These packages are also called
Answer
answer:
These bundles are also called fascicles.
explain:
Vertebrate skeletal muscle, also known as voluntary muscle, is the most common of the three types of muscle in the human body. Skeletal muscles are attached to bones by tendons and generate all movement between body parts. Muscle is a form of striated muscle tissue that is under the voluntary control of the somatic nervous system. Most skeletal muscles are attached to bone by bundles of collagen fibers called tendons. Skeletal muscle refers to several bundles (fascicles) of cells connected to each other, called muscle fibers.
The bundles of muscle fibers are called fascicles and are covered by perimysium. Muscle fibers are covered by endomysium. Within each skeletal muscle, muscle fibers are organized into individual bundles, each called a fascicle, by an intermediate layer of connective tissue called the perimysium.
Where is the ATP synthase complex found in the plant cell?
Answer
explain:
In eukaryotes, the ATP synthase complex is located in the inner membrane of the mitochondria and the ATP synthesis reaction takes place on the side of the membrane towards the matrix space. In plants, the enzyme is also found in the thylakoid membrane of the chloroplast, with the ATP-forming part facing the stroma.
DNA consists of two chain-shaped molecules called biopolymers. What are the structural units that are stacked together in a DNA molecule called?
Answer
answer:
nucleotide
explain:
Nucleotides are the building blocks of DNA and RNA and consist of a phosphate group, a 5-carbon sugar, and a nitrogenous base. The four nitrogenous bases in DNA are adenine, cytosine, guanine, and thymine, while RNA contains uracil instead of thymine, cytosine, guanine, and adenine.
The decrease in MPF activity at the end of mitosis is due to
Answer
answer:
Please read the explanation section.
explain:
MPF is a protein kinase. It catalyzes the transfer of phosphate groups from ATP to target proteins.
One of the pathways stimulated by MPF is the destruction of cyclin enzymes. This means that it stimulates the cyclin pathway. When mitosis begins, enzymes that break down cyclins are activated, and the level of cyclins begins to drop. Reduced levels of cyclins lead to reduced levels of MPF.
Nucleoli are round bodies found in most cell nuclei. Although not technically an organelle since it is not bound by a membrane, it can still be seen using an electron microscope and plays an important role in... A. It regulates the movement of substances in and out of the nucleus. B. Synthesis of ribosomes and ribosomal RNA. C. Synthesis of mitochondria and mitochondrial DNA. D. Liquid production in the core.
Answer
answer:
Synthesis of ribosomes and ribosomal RNA.
explain:
says in learning island
The answer is A, because if the regulatory substances inside and outside the nucleus
Nick investigates why baking powder is a common baking ingredient. He learned that baking soda contained tartaric acid and sodium bicarbonate. He also learned that when water is added to cake ingredients, a reaction occurs. This causes air bubbles to form, which allow the cake to rise. What gases do the bubbles contain and why are they formed? A. Formation of carbon dioxide gas due to the reaction of acids and carbonates. B. Acids and bases react to form carbon dioxide gas. C. Formation of gaseous hydrogen due to the reaction of acid and metal. D. Hydrogen gas is formed due to the reaction between acids and bases.
Answer
answer:
A. Formation of carbon dioxide gas due to the reaction of acids and carbonates.
How many waves are in a tsunami?
Answer
answer:
a lot
explain:
I don't know how to explain thank you
Explain how the relationship between "inertia" and "gravity" explains the paths the planets take around the sun.
Answer
answer:
Like all objects with mass, planets tend to resist changes in their direction of motion and speed. This tendency to resist change is called inertia, and its interaction with the sun's gravity keeps the planets in our solar system, including Earth, in stable orbits.
answer
Like all objects with mass, planets tend to resist changes in their direction of motion and speed. This tendency to resist change is called inertia, and its interaction with the sun's gravity keeps the planets in our solar system, including Earth, in stable orbits.
What is true about the Ptolemaic model? What is wrong?
Answer
Ptolemy's model of the solar system was a geocentric model, meaning it had the Earth at the center while the planets, moon, and sun revolved around it in complex ways.
What is the Ptolemaic model?
The most important feature of the Ptolemaic model is that the earth is at the center of the universe: the geocentric model. Ptolemy's tables were so effective in predicting positions in the night sky that they were used to make astronomical and astrological maps.
Ptolemy's modeling error was to ignore the non-uniform rotation of the upper planet on its axis. This is almost equivalent to ignoring the eccentricity of planet Earth's orbit relative to the upper planet.
Most modern people look down on Ptolemy's model of geocentric astronomy. Over time, however, Ptolemy's model of the solar system was shown to be incorrect, as were most other ancient theories.
Learn more about the Ptolemaic model here:
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Answer: Ptolemy believed that all heavenly bodies, including the planets, the sun, the moon, and the stars, revolved around the Earth. The Earth, at the center of the universe, has not moved at all.
Note: The outer planets, such as Uranus and Neptune, do not appear on any of the charts because they had not been discovered at the time. The planets are arranged in a row, which makes the chart easier to read; they are never arranged this way in nature.
Copernicus believed that the planets revolved around the sun and that the moon revolved around the earth. The sun at the center of the universe does not move, and neither do the stars.
Copernicus was right about some things, but wrong about others. The sun is not at the center of the universe, it moves like the stars. Both Copernicus and Ptolemy also believed that the orbits of the planets were circular, but we now know that they are elliptical.
explain:
I hope this helps
Two questions! Please reply as soon as possible! Please provide a detailed answer. Why do you think only single-celled organisms live in the deep pelagic zone?
Natural selection has shown that organisms with mutations that do not lead to survival will not reproduce alive, but some examples are occasionally found, such as albino animals. Do these exceptions inhibit natural selection? Explain your answer.
Answer
answer:
1 Heat and no resources for new organisms 2 Frogs can reproduce in different colors Natural selection has advantages and disadvantages Birds eat lighter frogs, darker frogs live
Reasonable?
explain:
Name 3 reasons why the Earth was hot when it first formed.
Answer
There are three main sources of heat deep within the earth:
(1) Heat not dissipated during the formation and accumulation of planets;
(2) Frictional heating caused by denser core material sinking into the center of the planet;
(3) The heat generated by the decay of radioactive elements.
Answers: 1) Heat from the formation and accumulation of planets that has not dissipated; (2) Frictional heating, caused by the sinking of the denser core material in the center of the planet; (3) Heat from the disintegration of radioactive elements.
explain:
"Alejandro recently had his cholesterol checked. His results showed a total blood cholesterol level of 260 mg/dL. Based on these results, what is his risk of coronary heart disease?"
Answer
answer:
The correct answer is: the risk of coronary heart disease is high.
explain:
All animals and humans need some cholesterol to regulate bodily functions, such as hormone production, vitamin D formation, cell membranes, and more. However, if a person has too much cholesterol in their body, their risk of coronary heart disease or coronary heart disease should be higher.
A total cholesterol level of less than 200 mg/dL (milligrams per deciliter) is normal for adults. Readings between 200 and 239 mg/dL are considered borderline and more than 240 mg/dL are considered high. Alejandro's measurements corresponded to high cholesterol levels, for which she had a higher risk of coronary disease.
Therefore, the correct answer is: the risk of coronary heart disease is greater.
Which of the following statements about mutations is incorrect? one. When one nucleotide base pair is replaced by another, this constitutes a point mutation. b.Sunlight causes mutations. C. Mutations are very rare. d) A general type of mutation is a change in the general organization of a chromosomal gene. and. Mutations in DNA always result in changes in the structure and function of the proteins produced.
Answer
answer:
Isn't the mutation real? E. Mutations in DNA always result in changes in the structure and function of the proteins produced.
explain:
It doesn't always lead to change. Sometimes it can be beneficial, sometimes it can be harmful, and sometimes it can do nothing.
Sometimes they do nothing.
1. Identify and explain the interactions between gelada baboons and waria deer? 2. Identify and explain the relationship between guanacos and pumas?
If you do not know the answer to both, answer at least one of them.
Answer
answer:
The relationship between Puma and Guanaco is a Predator-Prey relationship
explain:
Predator is a term used to describe animals at the top of the food chain that eat other animals (prey for short). So a predator feeds on its prey. In this example, the Puma is the predator and the Guanaco is the prey.