Answer:
The answer is "The concentration sample A= 0.00006[tex]\frac{mol}{L}[/tex] and concentration of sample B is 0.00003[tex]\frac{mol}{L}[/tex]".
Explanation:
Length of path [tex](l)=1 \ cm\\\\[/tex]
Coefficient extinction[tex](\varepsilon )=6220\ \frac{L}{Mol \ cm}\\\\[/tex]
Absorbace of sample [tex](A)=0.4\\\\[/tex]
Absorbace of sample [tex](B)=0.2\\\\[/tex]
For sample A:
[tex]A=\varepsilon cl\\\\0.4=6220 \times c \times 1\\\\c=\frac{0.4}{6220}\\\\[/tex]
[tex]=0.00064\ \frac{mol}{L}[/tex]
For sample B:
[tex]A=\varepsilon cl\\\\0.2=6220 \times c \times 1\\\\c=\frac{0.2}{6220}\\\\[/tex]
[tex]=0.00003\ \frac{mol}{L}[/tex]
Viruses and bacteria can infect human cells. Bacteria are living organisms, while viruses are not. How do you think the treatment for viral and bacterial illnesses differ? How do you think they affect healthy body cells? Explain your response.
Bacteria cause bacterial infections. Viruses cause viral infections. Antibiotic medicines kill or keep many bacteria from growing but don't treat viruses.
What is a virus?
A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea.
The virus works by damaging the wall and the lining of the alveolus and capillaries. The debris from the damage, which is plasma protein accumulates on the alveolus wall and thickens the lining. As the walls' thicken, the transfer of oxygen to the red blood cells is impaired.
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What consist of a cell body that contains the 
Answer:
The cell body, or soma, contains the nucleus of the cell and its associated intracellular structures. Dendrites are specialized extensions of the cell body.
Explanation:
What are the applications of CRISPR/Cas9-mediated Epigenetic Editing?
The CRISPR/Cas9 with the advantages of low cost and ease of use gives researchers the opportunity to manipulate the epigenome and observe its possible effects on cell function, development, and differentiation (Figure 1). Using non-active dCas9 (another type of Cas9 lacking nuclease activity but retaining DNA binding activity) fused enzymes such as DNA methylase, histone acetyltransferase, and deacetylase can be targeted to alter the epigenetic state of precise locations within the genome.
https://www.creative-biogene.com/crispr-cas9/solution/crispr-cas9-mediated-epigenetic-editing.html
Answer:
Applications:
- silence gene expression of target genes
- activate gene expression of target genes
- determine the role of DNA methylation and histone modifications (methylation, acetylation, etc) on specific regulatory sites (e.g., enhancer sequences)
Explanation:
The CRISPR/Cas9 system can be repurposed to edit the epigenome of living cells. For this purpose, it is required 1-to fuse a catalytically inactive 'dead' Cas9 enzyme with enzymes involved in epigenetic mechanisms (e.g., DNA methyltransferases, histone deacetylases, etc) capable of activating or deactivating gene expression, and 2-to design single-guide RNAs (sgRNAs) complementary to the sequence of interest (i.e., target sequences whose epigenome landscape we are trying to modify). For example, dCas9 gene has been fused with the DNA methyltransferase 3a (Dnmt3a) gene to create a dCas9-DNMT3A complex which can be combined with a specific sgRNA in order to study the effects of DNA methylation at a particular gene. These CRISPR/Cas9-mediated epigenome editing systems have shown to be very useful to understand how epigenome drives chromatin folding and dynamics at specific genomic sites (loci), and thus regulate gene expression at the transcriptional level.
True or false: If we extracted DNA from thyroid and neural tissues, we would find the CALCA gene in both types of cells.
Answer:
True
Explanation:
The calcitonin/calcitonin gene-related peptide (CALCA) gene is used to encode different peptide sequences (i.e., calcitonin hormone, calcitonin-related peptides and katacalcin) through alternative RNA splicing. These peptides have different functions. Calcitonin is a hormone mainly produced by cells of the thyroid gland, which is involved in the control of levels of calcium and phosphate in the blood. Moreover, katacalcin is a peptide synthesized from the same precursor of calcitonin (and therefore also mainly produced by cells of the thyroid gland), which is implicated in both calcium regulation and skeletal maintenance. Finally, the calcitonin gene-related peptide (CGRP) is a peptide mainly produced by sensory nerves (type Aδ fibers ), which is involved in pain pathways. The CALCA gene has attracted considerable attention from geneticists because it is specifically expressed in neuroendocrine tissues in normal conditions and abnormally induced in septic conditions (i.e., during the body's extreme response to an infection).
Pls help
Which type of reproduction provides organisms with the following advantages? Desirable traits can be selectively bred for in a population of organisms. More genetic diversity that might benefit individuals when environment changes.
A. Asexual reproduction
B. Sexual reproduction
Trace how the brain responds to stimuli through the nerves and neurons.
Answer:
The correct answer is -The brain and the spinal cord respond and sends a signal down a motor neuron to a specific sensory stimulus.
Explanation:
Sensory receptors sense the changes that take place in the environment that is called stimuli by sensory neurons that transmit the signal from the sensory receptors to the brain.
The brain and the spinal cord make the central nervous system. This coordinates a response to a specific stimulus and sends a signal down a motor neuron and send a signal to the effector by motor neurons.
Gastrointestinal issues in a somatization disorder often lead to __________.
A.
symptoms in women that affect their menstrual cycle
B.
the inability to swallow or loss of voice
C.
other disorders if not treated appropriately
D.
unnecessary medical procedures and surgeries
Answer:
D. unnecessary medical procedures and surgeries
Explanation:
Got it right on edge2020, Somatoform Disorders {Pratice}
Somatization disorder is a condition where the patient presents physical ailments as gastrointestinal issues that can lead to unnecessary medical procedures and surgeries.
What is a somatization disorder?It is a chronic condition in which the person has physical ailments without an apparent medical cause.
Due to the difficulties in finding the origin of the problem, it can lead to unnecessary medical procedures and surgeries, in addition to the fact that diagnosis and treatment care usually falls on the somatic nervous system.
Therefore, we can conclude that somatization disorder is a condition where the patient presents physical ailments as gastrointestinal issues that can lead to unnecessary medical procedures and surgeries.
Learn more about somatization disorder here: https://brainly.com/question/10404037
oii-xepq-sxi come on fast...
Answer:
nnnoooo
Explanation:
Assume similar data for the motion of the blood in a carotid artery which connects the aorta to the brain. Estimate how many beats of the heart it will it take the blood to get from your aorta to your brain. (Assume that the distance from your aorta to your brain is 30 cm.)
Answer:
4 beats
Explanation:
The number of beats of the heart that will take blood from Aorta to The Brain
n = Distance from Aorta to brain / distance per beat
Given that distance per beat = 7.5 cm ( calculated value outside scope of question using the data attached below)
n = 30 cm / 7.5 cm
= 4 beats
1. Much of the behavior of all primates is learned. Nonetheless, we have suggested many times that primate behavior has been shaped by natural selection. How can natural selection shape behaviors that are learned
Answer:
Nature selects best suited organisms having behaviours that help in the survival of organisms in that environment.
Explanation:
Natural selection can shaped the behaviors that are learned by the organisms because these behaviours helped organisms in their survival. Those organisms will be selected by the nature which can withstand the changing environmental conditions. Organisms adopt different behaviours in order to survive harsh environmental condition and these behaviour shaped by the natural selection in that organism so that they survive and grow in that environment.
Fill in the following 1Green plant are called ___________since the synthesise their own food.
rose leaves licth leave
What are the long cells called Tracheids
The flow of genetic information is controlled by a series of biochemical reactions that result in the production of proteins, each with its own specific order of amino acids. Choose the series of biochemical reactions in the correct order from the options presented here.
(a) replication, transcription, translation.
(b) replication, translation, transcription.
(c) translation, transcription, replication.
(d) translation, replication, transcription.
Answer:
A
Explanation:
As with DNA replication, partial unwinding of the double helix must occur before transcription can take place, and it is the RNA polymerase enzymes that catalyze this process. ... The DNA molecule re-winds to re-form the double helix. In the first step, transcription, the code in the DNA is copied to a different nucleic acid, RNA. In the second step, translation, the nucleic acid code in RNA is changed into a new form: amino acids. This step is called translation because the nucleic acid language is being "translated" into the protein language.
True or False
humans can survive longer without food than they can without water
name the type of coordinated response that takes place as a result of a specific stimulus, such as the withdrawal of the hand from a hot object touching the skin
Answer:
The correct answer is - reflex response.
Explanation:
If an individual touch something hot accidentally and immediate removal of the hand takes place, this occurs involuntarily. This type of coordination reaction called reflex action. Reflex action is an involuntary response that takes place due to a specific stimulus.
These stimuli result in an unplanned sequence of action or movement. Removing hand in response of contact to a hot object, change of the pupil of the eyes in response of light, coughing in response of some irritants in nassal passage and others. The reflex arch is the pathway they follow to carry out reflex action.
In a population of mice, there are two alleles of the A locus (A1 and A2). Tests showed that, in this population, there are 384 mice of genotype A1/A1, 210 of A1/A2, and 260 of A2/A2. What are the frequencies of the two alleles in the population
Answer:
f(A1) = 0.575f(A2) = 0.425Explanation:
Due to technical problems, you will find the complete explanation in the attached files
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All of the following are examples of erosion EXCEPT
O The wind in the desert blows sand against a rock.
O A glacier picks up boulders as it moves.
O A flood washes over a riverbank, and the water carries small soil particles downstream
O An icy winter causes the pavement in a road to crack
Which statement best describes the population at point B?
A. The death rate is high.
B. There is abundant food and space.
C. There is too much competition for resources D. The carrying capacity has been reached
Mitosis produces
A. two genetically different daughter cells
B. two genetically identical daughter cells
C.four genetically identical haploid cells
D.four genetically different haploid cells
Answer:
B. two genetically identical daughter cells
One person pushes to the left on a big rock. What are two ways a friend can apply a push or pull to help him?
Answer:
his friend can push the rock with him (on the left side) for his friend could pull (from the right side)
6. Which statement describes evolution?
* Identify the organelle that makes energy for the cell
O Nucibus
O Mitochondria
O Golgi Apparatus
O Cell Membrane
Answer:
O Mitochondria
Explanation:
Answer:
b
Explanation:
The mitochondrion (plural mitochondria) is a membrane-bound organelle found in the cytoplasm of eukaryotic cells. It is the power house of the cell
Which rock layer is probably the oldest?
A.
3
B.
5
C.
2
D.
4
Answer:
3
Explanation:
Answer: 4
Explanation: THE OTHER ANWSER IS WRONG
Warm air masses tend to flow only towards the North Pole.
True or false?
Answer:
true
Explanation:
An air mass acquires its characteristics from the region over which it forms, called its source region. ... Cold air masses tend to flow toward the equator, and warm air masses tend to flow toward the poles. This movement of air masses brings heat to cold area
please help with my biology
Answer:
Negative feedback
Explanation:
Try to bring the variable (temperature) down to normal set point is negative feedback
What is unusual about the cell walls of acid-fast-positive bacteria that makes them difficult to stain without heat
1.What do other organisms rely on plants for?
Answer: Organisms depend on other organisms and on the nonliving things in an ecosystem to meet their basic needs for food, water and protection. 3. Plants use energy from the sun to produce their own food from air and water.
Explanation:
Which of the following qualify as germs? Select all that apply.
A. Bacteria
B. Fungi
C. Protozoa
D. Viruses
Plz help me!!
This is due tomorrow!
Answer:
C
Explanation:
Answer:
C
Explanation:
Throwing stuff away increases pollution
Using paper one time means you need to throw it away
Riding everywhere in a car eventually leads to gas being burnt (with few exceptions)