Which of the following statements is true of chemical bonds?Both ionic and covalent bonds involve electrons in the innermost shell.
Covalent bonds share electrons between two atoms.
An atom involved in an ionic bond has an equal number of electrons and protons.
Salts are covalently bonded.
The atoms in a molecule of water (H2O) are bonded together with ionic bonds.
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The true statement of chemical bonds is covalent bonds share electrons between two atoms.
- A covalent bond is a type of interaction that involves one or more pairs of electrons (e-) being shared between two atoms.
- In a covalent bond, shared electrons are jointly attracted by both atomic nuclei.
- A double covalent bond occurs when four electrons are shared between two atoms, whereas a triple covalent bond involves the sharing of six electrons.
- An ionic bond is when one atom gives its electron to another atom, e.g., during the formation of sodium fluoride.
In conclusion, covalent bonds share electrons between two atoms.
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1. What purpose does the regulatory portion of the gene have? 2. In this simulation, the DNA molecule’s different strands are represented as different colors one blue and one red. What is the significance of the two different strands? Are they both used in transcription? 3. There are two required components to initiate transcription on the gene. What are they, and where do they bind on the DNA strand? 4. How would you know if transcription has been successful? 5. How do negative transcription factors impact transcription? 6.Explain the difference in transcription between Gene 1 and Gene 2. Hypothesize the reason for the difference.
Which of the following identifies the process shown at point Z?
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Answer: The frequency of the homozygous recessive genotype is the value of
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Answer:
The uterus and its columnar epithelium are examples of epithelial tissue.
Explanation:
They are two types of simple columnar ephitelia. Simple columnar ephitelia with microvilli secrete digestive enzymes and absorb digested food.
The simple ephitelia with cilia aid in the movement of mucus and reproducitve cells.
Answer: They are examples of Simple Columnar Epithelia.
Explanation:
For example:In female reproductive organs, the epithelium lines together with the fallopian tubes, endometrium and the inner part of the cervix (endocervix)
B. Oceanic crust is denser than continental crust.
C. Oceanic crust is less dense than continental crust.
D. Oceanic crust is older than continental crust.
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Answer:
B.) Oceanic crust is denser than continental crust.
Explanation:
Oceanic crust is denser, so it is subducted under the continental crust. The less dense magma then rises up through the continental crust, then it's further increasing the size of the continental crust and then maintaining it's lower density than the oceanic crust, which then causes subduction.
I hope this helped. I am sorry if you get this wrong.
Answer:
B.) Oceanic crust is denser than continental crust.
Explanation:
I just did it and got it right :)
b. False
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The answer is true. Addiction is a chronic, often relapsing brain disease that causes over time challenge an addicted person's self-control and hampers his or her personality. Drugs are chemicals that tap into the brain’s communication system and disrupt the way nerve.
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Answer:
Mixed inhibition refers to the combination of two reversible types of enzyme inhibition, competitive inhibition and non-competitive inhibition. The term mixed is used when the inhibitor can bind both the free enzyme and the enzyme-substrate complex. In mixed inhibition the inhibitor is in a different place from the active site where the substrate is found.
Mathematically, mixed inhibition occurs when both alpha and alpha-prime factors (introduced in the Michaelis-Menten equation representing competitive and non-competitive inhibition respectively) are present (they are larger than unity).
In a special case of mixed inhibition, the alpha and alpha-prime factors are the same, then non-competitive inhibition occurs.
With this type of inhibition Km depends on the affinity of the inhibitor to join E or ES and Vmax decreases.
Enzymatic inhibitors are molecules that bind enzymes and decrease their activity. Since blocking an enzyme can kill a pathogen or correct a metabolic imbalance, many medications act as enzyme inhibitors. They are also used as herbicides and pesticides. However, not all molecules that bind to enzymes are inhibitors; Enzymatic activators bind to enzymes and increase their activity.
The binding of an inhibitor can prevent the substrate from entering the active site of the enzyme and / or hinder the enzyme from catalyzing its corresponding reaction. The inhibitor binding may be reversible or irreversible. Normally, irreversible inhibitors react with the enzyme covalently and modify their chemical structure to the level of essential residues necessary for enzymatic activity. In contrast, reversible inhibitors bind to the enzyme in a non-covalent manner, resulting in different types of inhibitions, determined whether the inhibitor binds to the enzyme, the enzyme-substrate complex or both.
Many medications are enzymatic inhibitors, so their discovery and improvement is an active field of research in biochemistry and pharmacology. The validity of a medicinal enzyme inhibitor is usually determined by its specificity (its inability to bind to other proteins) and its potency (its dissociation constant, which indicates the concentration necessary to inhibit an enzyme). A high specificity and potency ensures that the medication will have few side effects and therefore a low toxicity.