Microbiology is the study of microscopic organisms, such as bacteria, viruses,
Abnormalities in the number of X chromosomes tends to have milder phenotypic effects than the same abnormalities in autosomes because of ___________.
Answer:
D. (X inactivation) I believe!
Hope this helps! Have a nice day :)
An enzyme, Pittpantherase, has a KM of 8mM. At a substrate concentration of 4mM, the velocity of the reaction was 2mM/min. What is Vmax for this enzyme
Answer: [Vmax]= 6mM/min.
Explanation:
Enzymes are proteins that produce a specific chemical change in a substance, called substrate, resulting in a product. By following the rate of product appearance (or disappearance of the substrate) as a function of time, the kinetics of the reaction is obtained. As the reaction proceeds, the rate of product formation decreases and the substrate is consumed.
The rate [V] indicates the amount of substrate that is converted into product per second. With increasing substrate concentrations [S], the enzyme approaches its maximum velocity [Vmax], but does not reach it. For this reason, there is no specific value of [S] for Vmax. However, a characteristic parameter of the enzyme can be defined using the substrate concentration at which half of the maximum velocity (Vmax/2) is reached. The initial velocity of the reaction is equal to the slope of the zero-time forward curve and is measured before 10% of the total substrate is consumed, so that the substrate concentration can be considered as essentially constant throughout the experiment. So, although it is impossible to measure exactly the substrate concentration that gives Vmax, enzymes can be characterized by the substrate concentration at which the reaction rate is half the maximum rate. This substrate concentration is known as the Michaelis-Menten constant (KM). For enzymes exhibiting simple Michaelis-Menten kinetics this constant represents the dissociation constant of the enzyme-substrate complex (or the inverse of the enzyme-substrate affinity). Thus, Km indicates the affinity of the enzyme for its substrate, since the higher the Km the lower the affinity. And the lower the Km the higher the affinity.
The formula for the calculation is as follows:
[tex]V_{0}= \frac{[Vmax] x [S]}{[S]+[KM]}[/tex]
So if we replace the numbers, we get:
[tex]2mM/min= \frac{[Vmax] x [4mM]}{[4mM]+[8mM]}[/tex]
If we clear the equation, we obtain that [Vmax]= 6mM/min.
Should the U.S. be able to prevent other countries from developing nuclear power?
Answer:
We should use nuclear power instead of other sources of energy because it can produce high levels of electricity without causing damage to our environment and atmosphere. ... Nuclear power plants produce less pollution than many of our other current energy sources, including coal fire and natural gas plants . I dont think us will be able to prevent other countries from developing nuclear power because us is also developing nuclear power and 1 country cannot stop countries more than 150 ..
sinanthropus pekinenis was victim of cannibalism
What is produced during the replacement reaction of Ba(NO3)2 and Na2SO4?
2BaNa + 2NO3SO4
2NaNO3 + BaSO4
NaNO3 + BaSO4
BaNa2 + (NO3)2SO4
Answer:
2NaNO3 + BaSO4
Explanation:
Answer:
2NaNO3 + BaSO4
Explanation:
Hydrocarbons are burned to produce water and carbon dioxide. Propane (C3H8) is a homologous series alkane that belongs to the hydrocarbon family. As a result, when propane is burned, three molecules of carbon dioxide and four molecules of water are produced.
Because there is an overabundance of oxygen, carbon dioxide is created when butane is completely burned.
Apply logarithm to evaluate T given 644 204=400 000 (1+10%)^T,by first simplify the equation.
The value of T after applying logarithm to evaluate the function is 4.9988
Given the expression
[tex]644 204=400 000 (1+10 \%)^T[/tex]
Since 10% = 0.1, the expression becomes;
[tex]644 204=400 000 (1+0.1)^T\\644 204=400 000 (1.1)^T\\\frac{644204}{400000} =1.1^T\\1.61051=1.1^T[/tex]
Take the logarithm of both sides
[tex]log1.61051=log1.1^T\\log1.61051=Tlog1.1\\Swap\\Tlog1.1=log1.61051\\T=\frac{log1.61051}{log1.1}\\T=\frac{0.2069}{0.04139} \\T=4.9988[/tex]
The value of T after applying logarithm to evaluate the function is 4.9988
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Is cell division a continuous process?
Illustrate with an example
Answer:
Cell division is the means of reproduction in unicellular organisms whereas it is the means of tissue growth and maintenance in multicellular organisms. ... In adults, cell divisions are involved in renewing old tissues rather than growth.,ya it is continuously processing
silicon and _______ stay in the the outer cells pls tell me fast
Answer:
It could be halogens for example things like fluorine
what are three characteristics of life that archaea bacteria have?
Answer:
The common characteristics of Archaebacteria known to date are these:
(1) the presence of characteristic tRNAs and ribosomal RNAs.
(2) the absence of peptidoglycan cell walls, with in many cases, replacement by a largely proteinaceous coat.
(3) the occurrence of ether linked lipids built from phytanyl chains.
Psychometric scores for anxiety, depression, negative self, somatization, and hostility were combined into a single Global Severity Index (GSI). Global Severity Index was compared for 80 adolescents who were seen in the outpatient clinic for 7 different physical complaints (short stature, obesity, lack of weight gain, breast problems, genital problems, menstrual problems, and hirsutism). Report the degrees of freedom for the relevant F statistic in the numerator and the denominator. (Round your answers to the nearest whole number.)
Answer:
The correct answer is -
Numerator = 6
Denominator = 73
Explanation:
In F static test or table there are two sets of degrees of freedom: one for the numerator and one for the denominator. The degrees of freedom are equal to the number of observations minus one. Thus, if the sample size were 7 then the degree of freedom would be 7 minus 1
Numerator df = 7 - 1 = 6
Thus, the numerato would be - 6.
Denominator is calculated by subtracting the observation or variables from the total number of sample size.
Denominator df = 80- 7 = 73
supuie ) Prokaryotes have nucleus that is without : i) nuclear ii) membrane nucleous iii) nucle
Answer:
the ans is
NUCLEOUS MEMBRANEor
MEMBRANE nucleus u can call it either way
Answer:
Nucle
Explanation:It is said that Prokaryotes have nucleus that has nuclear,membrane and nucleous
QUESTION 6
Which one of the following substances is not a product of aerobic respiration?
A.
ATP
B.
Water
C.
Alcohol
D. Carbon dioxide
Answer:
C. alcahol
Explanation:
aerobic respiration equation
glucose+ oxygen -> carbob dioxide gas + water + energy
Answer:C
Explanation:
Rain and snow are two forms of ____________.
Answer:
precipitation
Explanation:
The most common types of precipitation are rain, hail, and snow. Rain is precipitation that falls to the surface of the Earth as water droplets.
What is the use of hormones in humans
Answer:
Hormones are chemical messengers that use your bloodstream to travel throughout your body to your tissues and organs.
Explanation:
Answer:
Hormones are chemical messengers that move throughout your body via your bloodstream to your tissues and organs.
OAmalOHopeO
If you were given the power to control the United States government and policy what changes would you make regarding the environment and how would you fund these? You can consider your response to the question and/or include other issues.
Answer:
i would probably fund different jails using taxes. there's absolutely no reason someone who accidently committed tax fraud should be sitting in the same cell as aconvicted murderer. & abd I would make harder consequences for hate crimes. like jail time.
If Sarah had skin vesicles on the anterolateral region of her neck, which peripheral nerve is infected by the virus? To which peripheral nerve plexus does this nerve belong?
Which of the following statements relating to leptin and the metabolism of lipids is correct. (Select all that apply.) Leptin acts mainly in the brain to stimulate appetite. High levels of leptin are interpreted as overfeeding. Insulin stimulates production of leptin in adipocytes. Leptin is a hormone involved in short-term control of eating behaviour. Higher leptin levels result in a decrease in appetite.
Answer:
High levels of leptin are interpreted as overfeeding.
Insulin stimulates production of leptin in adipocytes.
Higher leptin levels result in a decrease in appetite.
Explanation:
Leptin is a peptide hormone that helps to control body weight. This hormone (leptin) is synthesized by fat cells (i.e., adipocytes), then circulates in the blood and goes to the brain, in particular in a region of the brain called the hypothalamus, where it acts to alter food intake over the long term. Higher leptin levels trigger the hypothalamus to lower the appetite. Insulin is another peptide hormone that acts to regulate long-term leptin secretion of adipose cells through a posttranscriptional mechanism. In turn, leptin increases insulin sensitivity, thereby both hormones regulate each other. When body fat decreases as a consequence of decreased appetite, insulin and leptin concentrations in the bloodstream also decrease.
Question 1 of 10
Consider the following geometric solids.
A sphere with a ratio of surface area to volume equal to 0.3 m
A right circular cylinder with a ratio of surface area to volume equal to
2.1 m?
What results would you expect if these two models were compared in a
diffusion test?
A. The rate of diffusion would be slower for the right cylinder,
B. The rate of diffusion would be the same for the two models.
0
C. The rate of diffusion would be faster for the right cylinder.
D. The rate of diffusion would be faster for the sphere.
Answer:
the rate if diffusion will be faster in the right cylinder
Explanation:
The surface area to volume ratio of the cylinder is higher. This means that in the cylinder more reactants are exposed at the surface and the rate at which diffusion takes place increases
Neurons are classified functionally according to the direction the ____________ travels relative to the ____________ . Afferent neurons are the neurons of the sensory nervous system. They are responsible for conducting ____________ input from both somatic sensory and visceral sensory receptors. Most sensory neurons are ____________ . Efferent neurons are the neurons of the motor nervous system, conducting ____________ output from the CNS to the effectors. All motor neurons are ____________ . Interneurons (or ____________ neurons) lie entirely within the CNS. They receive stimulation from many other neurons and carry out the integrative function of the nervous system. The most numerous types of neurons are ____________ .
Answer:
Based on their roles, the neurons found in the human nervous system can be divided into three classes: sensory neurons, motor neurons, and interneurons.
Explanation:
Neurons are classified functionally according to their direction. The nerve impulse travels relative to the receiving neuron.
What do you mean by Neurons?Neurons may be defined as nerve cells that are responsible for the transmission of signals from the body to the brain.
Afferent neurons are the neurons of the sensory nervous system. They are responsible for conducting nerve impulse input from both somatic sensory and visceral sensory receptors. Most sensory neurons are afferent neurons.
Efferent neurons are the neurons of the motor nervous system, conducting nerve impulse output from the central nervous system to the effectors. All motor neurons are efferent neurons.
Interneurons or associated neurons lie entirely within the central nervous system. They receive stimulation from many other neurons and carry out the integrative function of the nervous system. The most numerous types of neurons are interneurons.
Therefore, it is well described above.
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what is diffusion and why is imo
You learned in the previous lesson that T cells require two independent signals to become activated. When T cells are activated, they acquire effector functions and begin to proliferate. This two-signal mechanism prevents the expansion of self-reactive effector T cells. Similarly, B cell receptor signaling alone is not sufficient to activate B cells. B cells require assistance from helper T cells to become activated by monovalent protein antigens and gain certain immune functions. What changes do you suspect will occur to B cells when they are activated by protein antigen and receive T cell help? (select all that apply)
a) They will generate memory cells that can respond to a subsequent exposure to antigen.
b) Their immunoglobulin genes will be mutated in a way that alters antigen affinity.
c) The isotype of their immunoglobulin (Ig) genes will change.
d) They will proliferate and expand.
e) They will secrete antibodies.
Answer:
a. They will generate memory cells that can respond to subsequent exposure to antigen.
d. They will proliferate and expand
e. They will secrete anti bodies
Explanation:
B cells are type of white blood cells who belong to lymphocyte subtype. They are activated by binding of antigen to receptors on cells surface, against which they initiate and antibody response. Some of these cell proliferate and divide while other become long lived memory cells that respond subsequent exposure to antigen at later stage.
g In order to stimulate the renin-angtiotensin-aldosterone system (RAAS), _______________ cells in the kidney detect _______________blood pressure which causes ________________ to be released from the juxtaglomerular cells.
Answer:
Macula densa cells, lower and renin.
Explanation:
Macula densa cells in the kidney detect lowers blood pressure which causes renin to be released from the juxtaglomerular cells which is an enzyme. The arterial cells observe the drop in blood pressure, and the decrease in Na concentration is transfer to them by the macula densa cells. The juxtaglomerular cells then release an enzyme called renin. Renin converts angiotensinogen which is a peptide, or amino acid derivative into angiotensin-1.
What role does mutation play in the evolution of a species and the development of new characteristics?
Answer:
Mutation plays a vital part in evolution; it is the greatest source of genetic variation. In evolution, it creates a new DNA sequence for a particular gene, creating a new allele. Additionally, recombination can produce a DNA sequence (a new allele) for a specific gene through intragenic recombination.
Explanation:
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Eutrophication occurs when excess nutrients are supplied to a region, leading to an algae bloom and ultimately ______
A. Coral bleaching
B. Ocean deoxygenation
C. Ocean acidification
D. Overfishing
Answer:
The correct answer is - B. Ocean deoxygenation.
Explanation:
Eutrophication is the process in which a water body gets excessively rich in nutrients that leads to the algal growth or plankton growth in this region and covers the complete surface or most of the water body.
Due to this algal and plankton growth, there is a significant decrease in the concentration of the dissolved oxygen in water bodies that result in the incapability of supporting the lives found in it. The primary and main reason for this deoxygenation is eutrophication. Ocean deoxygenation is the reduction of the oxygen concentration of the oceans.
A new member of your team is visually impaired. He's having a hard time reading his computer screen. How can you show that you value diversity? a) Suggest the organization may not be a great fit. O b) Tell him to apply for a different job within the organization that does not b) require computer usage. 12 Od Tell him that he might want to schedule an eye exam. c) d) Provide access to technology that can magnify or read what is on the computer screen.
Explanation:
Provide access to technology that can magnify or read what is on the computer screen.
Which of the following statements are true
A calorie is a unit of heat
B one calorie is the energy required to raise 1 kilogram of water
C the preferred unit in metabolism studies and nutrition label is a kilogram
Answer:
Calorie is a unit of heat
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.
what is the phylum of lizard?
Lizard belongs to chordate phylum.
hope it helps you.
During alcoholic fermentation, when is NAD+ converted to NADH -- during the conversion of glucose to pyruvate (glycolysis) or during the conversion of pyruvate to alcohol?
Answer:
During the conversion of glucose to pyruvate glycolysis or during the conversion of pyruvate to alcohol
Explanation:
During the conversion of glucose to pyruvate, NAD+ is converted into NADH.
What is alcoholic fermentation?Alcoholic fermentation is a biological process that converts sugars into cellular energy while emitting ethanol and carbon dioxide as byproducts.
The NADH + H+ from glycolysis would be recycled back to NAD+ during the fermentation process, allowing glycolysis to continue. NAD+ is reduced during glycolysis to form NADH + H+.
Thus, during this, when glucose is converted to pyruvate, NAD+ is being converted to NADH.
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In butterflies, having red antennas (denoted by “R”) is dominant to having white antennas (denoted by “r”). If both parents are heterozygous for red antennas, what are the predicted Phenotypic outcomes of their offspring? (hint: a punnett square will help you determine this).
In butterflies, having red antennas (denoted by “R”) is dominant to having white antennas (denoted by “r”). If both parents are heterozygous for red antennas, what are the predicted Genotypic outcomes of their offspring? (hint: a punnett square will help you determine this).
All the offspring of a cross between a black-eyed mendelien and an orange-eyed mendelien have black eyes. What is the expected F2 phenotypic ratio of a cross between two F1 black-eyed mendeliens?
A) 1 black-eyed:1 orange-eyed
B) 3 black-eyed:1 orange-eyed
C) 1 black-eyed:3 orange-eyed
D) 1 black-eyed:0 orange-eyed
The phenotypic ratio of the cross is as follows: 3 red antennas: 1 white antenna
For question 2, the phenotypic ratio of the F2 generation is: 3 black-eyed: 1 orange-eyed
QUESTION 1
According to the first question, a gene coding for antenna color in butterflies is involved. Red antennas (“R”) is dominant to white antennas (“r”). Hence, a butterfly with genotype "Rr" will be phenotypically red.
According to this question, If both parents are heterozygous for red antennas i.e. Rr (red antenna) × Rr (red antenna), the following gametes will be produced: R and r. Using these gametes in a punnet square (see attached image), the following phenotypic ratio of offspring is produced:
3 RED ANTENNAS (RR, Rr, Rr) : 1 WHITE ANTENNA (rr)
2. In the second question, all the offspring of a cross between a black-eyed mendelien (BB) and an orange-eyed mendelien (bb) have black eyes (Bb). In a cross between two F1 black-eyed mendeliens i.e. Bb × Bb, the following proportion of offspring is produced:
BB, Bb, Bb, bb
Hence, a phenotypic ratio of 3 black-eyed: 1 orange-eyed
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