Answer:
I, II, III
Explanation:
Allosteric regulation is a common mechanism of regulation of enzyme activity, which generally involves key enzymes in metabolic pathways. Allosteric modulation occurs when a substance/molecule called 'allosteric regulator' binds to an enzyme at a site other than the enzyme's active site, thereby triggering a conformational change in the enzyme and thus affecting its activity. Moreover, covalent modifications such as phosphorylation, acetylation, methylation, etc, are also involved in the regulation of enzymatic activity in metabolic pathways. For example, phosphorylation is a type of reversible covalent modification of proteins consisting of the addition of phosphate groups at specific amino acid residues (i.e., serine, threonine, and tyrosine) by specific enzymes known as protein kinases. Phosphorylation alters the three-dimensional (3D) structure of proteins, thereby turning the substrate or cellular pathway to active and/or inactive. Finally, both transcriptional and post-transcriptional mechanisms are also able to control the expression of enzymes involved in signaling pathways. Transcriptional mechanisms are capable of limiting the amount of mRNA that is produced from a given gene (in this case, an enzyme encoding gene), whereas post-transcriptional mechanisms such as, for example, RNA interference pathways, control the translation of messenger RNA (mRNA) molecules into proteins.
is what a drug does to your body. O a) Irrigation b) Pharmacodynamics c) Excretion d) Pharmacokinetics
Explanation:
Option b is the correct one
Reactive hyperemia is an example of .......... control of local blood flow .
and is a ........ response
A) Myogenic-Short term
B) Chemical-Long term
C) Neural-Short term
D) Metabolic-Short term
Answer:
metabolic short termExplanation:
Reactive hyperemia is the blood flow response to blood flow Occlusion whereas active active is a blood flow response to increase tissue metabolic activityYou are studying an enzyme that is inactivated by phosphorylation and create a mutant in which the threonine that is normally phosphorylated is replaced with glutamate. Predict the impact of this change on the activity of this enzyme. Group of answer choices
Answer:
always active
Explanation:
Phosphorylation is a posttranslational modification that consists of the addition of phosphate groups to specific amino acids on the protein. Phosphorylation acts as a molecular switch for proteins that are phosphorylated (i.e., in some situations phosphorylation acts to activate protein function, whereas in other situations phosphorylation can inactivate protein function). Phosphorylation modifies the three-dimensional structure of the protein, thereby affecting, for example, the accessibility of the active site of a phosphorylated enzyme to its substrate. Phosphorylation can occur only at the side chains of three amino acids: Serine, Threonine and Tyrosine. In this case, the enzyme is inactivated by phosphorylation on the Threonine residue, so it is expected that the mutant enzyme cannot be phosphorylated, remaining in an active state.
hey ,What is biological community answer it .Good night
Answer:
Community, also called biological community, in biology, an interacting group of various species in a common location. For example, a forest of trees and undergrowth plants, inhabited by animals and rooted in soil containing bacteria and fungi, constitutes a biological community.
Explanation:
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Answer:
It's a group of various species in a common place.
For example: a forest of trees and undergrowth plants, lived in by animals and rooted in soil including bacteria and fungi, would make a biological community.
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3. When recording medication administered to a client on the medical administration record, always add
next to each medication you deliver.
A. the client's weight
B. the client's initials
C. your initials
D. the client's resting heart rate
Answer:
option B
Explanation:
Answer:
your initials
are the ones that should be in the MAR. since your the one who gave the medication.
The development of DNA technology is bringing profound changes to science, agriculture and healthcare. Provide one example of a DNA technology and provide at least one advantage and one example of a concern or problem associated with its use.
Answer:
The CRISPR-Cas9 genome editing system can be used to edit genes and correct mutations associated with inherited diseases. However, this technology also has the potential to edit genes in germline cells in order to irreversibly modify the human species and the natural evolution of life
Explanation:
The CRISPR-Cas9 (Clustered regularly interspaced short palindromic repeats and CRISPR-associated protein 9) system is a natural prokaryotic defense system used by bacteria to defend against invading DNA. In the laboratory, the CRISPR-Cas9 system has been repurposed to create a versatile genome-editing tool that allows us to modify the genome of mammalian cells in a targeted fashion. The CRISPR-Cas9 is a simple gene-editing tool that consists of a single guide RNA (sgRNA) that guides the Cas9 enzyme to the exact genomic location where Cas9 needs to make a cut, which is then repaired by different DNA repair mechanisms. During DNA repair, nucleotides can be replaced and/or deleted, thereby producing desired genomic modifications. The CRISPR-Cas9 has an enormous potential to repair mutations in genes associated with inherited genetic disorders and cancer (i.e., oncogenes might be reversed in vivo by using this technology). However, the CRISPR-Cas9 genome editing system is also a subject of concern due to its dual use. For example, this technology can be used to modify the genome of germline cells by inducing mutations that can be passed across generations, thereby irreversibly modifying human DNA and altering the normal course of evolution.
what is haemopoiesis??
Haemopoiesis is from greek meaning “ to make. new blood” •
Explanation:
It refers to the formation of blood cellular. components.
Lectins often bind their ligands via multiple weak interactions. bind their ligands with relatively low specificity. prevent viruses from binding to their target cells. are carbohydrates that bind to receptor proteins.
Answer:
The correct answer is - B.often bind their ligands via multiple weak interactions.
Explanation:
Lectins are specific types of proteins that identify and bind to specific carbohydrates present on the cell surfaces. They have an essential role in interactions and communication between various cells for identification and recognition.
Binding sites of lectins on the surface of one cell bind to the Carbohydrates on the surface of another cell. A lectin usually has two or more binding sites for carbohydrate units.
What is a community?
1 all the animals that live in a habitat
2 a single species that lives in a habitat
3 all the species that live in a habitat
4 a population that lives in a single habitat
Answer:
3. All the species that live in a habitat.
A community is where all the species live in a habitat. Hence the correct option is 1.
A community is an ecological term that encompasses all the different species of organisms that coexist and interact within a specific habitat or geographic area. It includes plants, animals, fungi, and microorganisms that share the same environment and form intricate ecological relationships with each other.
These relationships can be competitive, predatory, symbiotic, or other forms of interactions that influence the dynamics and structure of the community. Understanding the composition and interactions within a community is vital in studying the biodiversity, ecosystem functioning, and overall health of a given habitat.
Hence the correct option is 1.
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Which of the following groups includes a protozoan that is transmitted sexually?
Chromalveolata
Excavata
Amoebazoa
Archaeplasteda
Rhizaria
Which of the following is a distinction between Ascomycetes and Basidiomycetes?
Ascomycetes form a sac around the sexual spores.
Ascomycetes have zygotes.
Ascomycetes release basidiospores.
Basidiomycetes form a shell around the sexual spores.
Basidiomycetes release conidiospores.
Which of the following is a specialized structure that would contain food ingested by phagocytosis?
Saprozoic
Cytostome
Cytoproct
Oral groove
Holozoic
Which part of a mushroom would be eaten?
Thallus
Sporangium
Mycelium
Septum
Hyphae
Answer:
Ascomycetes have zygotes
Mycelium
Explanation:
Ascomycetes have zygotes which is the main distinction between Ascomycetes and Basidiomycetes. Mycelium is a part of mushroom that is edible and can be eaten. Mycelium is the vegetative part of a fungus that consist of a mass of branching, thread-like hyphae. Hypha is a long, branching, filamentous body of mushroom as well as oomycete and actinobacteria. Hyphae are the primary mode of vegetative growth of fungi which is generally known as mycelium so mycelium is the edible part of mushroom.
how much water was retained by soil C
Answer:
we dont know sorry but i dont know
what challenges do scientists face when classifying a new fossil?
Answer:
You have to clean the fossils and figure out how old they are and what kind of fossils they are.
Explanation:
Answer:
They are often broken and not complete
Explanation:
Due to aging they are often broken and not complete which could make it difficult if you do not have the entire thing. It's also difficult because there are slight differences between organisms.
a special effects artist mixes two different liquids in a bowl. both liquids are white. when she heats the bowl, a new compound forms. will the new compound be a white liquid?
Answer:
if a special effects artist mixes two different liquids in a bowl and they both are too white !
after heats those liquids
its forms curd like substance
its either will be white, its can increase its colour as darkish white or lightly yellowishblack
when she heats the bowl, a new compound forms and it will be white before heating and after heating it may be white or other dark color.
What are the properties of a compound ?A compound composed up of two or more elements which are chemically combined with a fixed proportion by their mass.
For example, Water, Sodium Chloride, Ammonium Chloride etc.
They have fixed melting and boiling points.
Formation of compound is a change in chemical reaction and the components of compound are mixed in a fixed proportion.
Two major types of compounds are covalent and ionic compounds.
Covalent compounds refers to formation of covalent bond among two nonmetals, like water or methane. These molecules are neutral and weak.
When metal react with non metal it form Ionic compounds, are held together by opposite charges, so the bond is stronger than covalent compound.
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The following offspring were observed from many crossings of the same pea plants. What genotypes were the parents?
465 purple axial flowers
152 purple terminal flowers
140 white axial flowers
53 white terminal flowers
a) PpAa x PpAA
b) PpAa x PpAa
c) PpAa x ppAA
d) PPAA x ppaa
e) PPaa x ppAA
Answer:
a
Explanation: the genotype is the same
Cross between same pea plants for many generations having genotype PpAa x PpAa because after crossing over parents character having a large number of phenotype in offspring, hence a is the correct option.
What is a genotype?The term "genotype" ranges to an organism's genetic makeup, in other words, it describes an organism's whole gene. The term can also be used to refer to the alleles, or variant forms of a gene, that an organism carries in a more specific meaning.
When crossing of particular traits having genotype PpAa x PpAa because after crossing over parents' character having a large number of phenotypes in offspring.
The genotype of a person is their own DNA sequence. More specifically, the two alleles a person inherited for a particular gene are referred to using this term.
Therefore genotype parents PpAa x PpAa offspring have a large number of traits the same as parents and a low number of new traits.
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The most intense earthquakes happen at
1. Plate boundaries
2.subduction zones
3.mid - ocean ridges
4. Collision plate boundaries
Answer:
The answer is #2. Subduction Zones
What is the chain of custody?
A) the order of who gets custody of the crime scene
B) the paper trail of every person that has been in contact with the evidence throughout its seizure, collection, preservation, analysis and
disposition
C) the order of suspects
D) the people who have custody of children until the case is closed
What about the structure of DNA allows it to copy itself?
A. It is held together mostly by hydrogen bonds, which are easy to open for replication
B. It has enzymes built into the helix that make a copy when needed.
C. It is double stranded, so each side serves as a template for a new strand.
D. DNA is not copied, it is only passed down through each generation.
Answer:
C. It is double stranded, so each side serves as a template for a new strand
Explanation:
The structure of DNA is double stranded, so each side serves as a template for a new strand. The correct option is C.
What is DNA replication?Replication is the procedure by which the DNA of the genetic code is copied in cells.
Before dividing, a cell must duplicate (or replicate) its a whole genome so that each eventually results daughter cell has its own entire genome.
The DNA replicates itself multiple times during the process of replication. It is a biological polymerization that goes through the steps of commencement, elongation, and termination.
The reaction is catalyzed by enzymes. The main enzyme in the process of replication is DNA Polymerase.
DNA replication occurs in eukaryotic cells' interphase nuclei. At the S-stage (synthesizing) of the cell cycle, DNA replication occurs prior to mitosis.
Thus, the correct option is C.
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DNA is negatively charged. Therefore, it is
O hydrophilic
O hydrophobic
Organisrns that transfer diseases to hurnans are
O hosts
O pathogens
O parasites
O vectors
silicon and _______ stay in the the outer cells pls tell me fast
Answer:
It could be halogens for example things like fluorine
Which of the following traits are characteristic of all mammals?
Mammals are air-breathing, warm-blooded, and have a backbone, yet these characteristics do not distinguish them from the rest of the animal kingdom. Mammals have the ability to regulate their body temperature using their metabolism and sweat glands in a way that no other animal can.
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Which of the following is not a difference between photosynthesis and
cellular respiration?
A. Where they occur in cells
B. Being part of the carbon cycle
C. The products of the processes
D. The materials needed for the processes
Answer:
[tex]\boxed {\boxed {\sf B. \ Being \ part \ of \ the \ carbon \ cycle}}[/tex]
Explanation:
Photosynthesis and cellular respiration are both important processes to utilize energy and maintain life in an organism. There are many differences between the two, but we are asked to identify the answer that is not a difference.
A. Where they occur in cells
Photosynthesis occurs in chloroplasts in plants, algae, and some bacteria. Cellular respiration occurs in mitochondria in all organisms. This is a difference.
B. Part of the carbon cycle
The carbon cycle describes the exchange and movement of carbon throughout the Earth, atmosphere, and biosphere. Photosynthesis uses carbon dioxide and cellular respiration produces it, so they are both part of the carbon cycle. This is not a difference. This seems to be correct, but let's check the other choices.
C. The products of the processes
Photosynthesis produces oxygen and glucose, while cellular respiration makes carbon dioxide, water, and energy or ATP.
D. The materials needed for the processes
Photosynthesis needs carbon dioxide, water, and energy from the sun, while cellular respiration needs oxygen and glucose.
Both photosynthesis and cellular respiration are part of the carbon cycle, so the choice that is not a difference is Choice B.
Please help me with these questions
I will mark the Brillianest
Answer:
[tex] \pink{\qquad \boxed{\boxed{\begin{array}{cc} \maltese \: \: \: \bf \: see \: the \: picture \: \: \end{array}}}}[/tex]
Describe the disadvantages of an open circulatory system relative to a closed circulatory system.
Explanation:
The disadvantage of a closed circulatory system is that with the blood always contained in vessels, it's under higher pressure. This means it can flow faster, which is necessary for supporting the metabolic rate of more complex animals such as vertebrates. Open circulatory systems are low-pressure systems that cannot meet the needs of a fast metabolism.
Growers often wrap potted plants in plastic sleeves prior to shipping. If plants remain in these sleeves too long, their leaves curl and fall off. Imagine you are working at a garden center and have been asked to make a presentation to a local garden club. Unit 5 DQ Question: Explain the processes that may cause the leaves to drop and fall.
Answer:
Shock, age and climate.
Explanation:
The processes that may cause the leaves to drop and fall are shock, age and climate. The plants drop their leaves due to shock when they experience by transplanting from place to another. When the leaves get older having yellow colour so due to no function it falls. The climatic condition is also responsible for the dropping of leaves. Those plants which can't grow in cool season so when the winter comes they shed their leaves and wait for the summer season.
What happened to the California Condors?
A. They went extinct in 2002 due to destruction of their habitat.
B. There were only 149 left in the 1980's but even with a captive breeding
program they went extinct in 2010.
C. They went extinct in the 1700's but remains from a well preserved skeleton
contained enough to DNA to begin cloning them.
D. In 1985 there were only 9 left, but a captive breeding program has increased
their number to 300.
Answer:
B
Explanation:
California Condors have been in decline about as long as European Settlements began to spread across North America. These birds have been on the U.S endangered species list since 1967 and were near extinction when their captive-breeding program began. California Condors also mature and reproduce slowly.
an organism that uses oxygen to break down food to obtain energy
1. An oral examination limits the practitioner to knowledge of what is seen clinically.
a. True
b. False
2. Dental radiographs allow the practitioner to see many conditions that are not apparent clinically.
a. True
b. False
Answer:
1. True.
2. True.
Explanation:
Diagnostic testing can be defined as a scientific process that typically involves identifying a condition or its cause through a series of procedures and examination.
In Medicine, a diagnostic test can be used to identify a disease (sickness) or cause of symptoms.
This ultimately implies that, a diagnostic test avails medical professionals or experts the opportunity to identify illnesses and underlying causes of symptoms.
1. True: an oral examination limits the ability of a medical professional or expert (practitioner) to have knowledge of what is seen clinically.
2. True: dental radiographs is an equipment which allow a medical professional or expert (practitioner) to see many conditions that are not apparent clinically.
Amoeba sisters video recap Biomagnification
Biomagnification refers to the presence of higher concentration of chemical toxins as a result of the accumulation of toxins in organisms.
What is biomagnigication?Biomagnification is best explained as a condition in which the chemical concentration of a toxin is amplified in an organism compared to the environment in which the organism is found.
Biomagnification usually is observed as one goes higher in the trophic levels of organisms.
For example, chemical pollutant found in water may be present at tolerable levels. However, in organisms, living in the water, the concentration of the pollutant is higher as these organisms accumulate these toxins in their tissues.
Therefore, biomagnification refers to the accumulation of toxins in organisms higher than found in their environment.
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give a reason why lack of roughage in diet often leads to constipation
Answer:
The main cause of constipation is intake of a low fiber diet.the bulk and soft texture of fibre helps prevent hard dry stools that are difficult to pass thereby reducing constipation.
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