Answer:
The correct answer is option a. "7.1".
Explanation:
One easy way to determine if a peptide sequence is acidic, basic or neutral is to check for the number of amino acid residues that are acidic, basic or neutral. In this case, most amino acid residues are neutral, which mean that under neutral conditions they have a pKa close to 7.0. Particularly, the content of 3 leucine, 2 alanine and 2 glycine residues determines that the peptide have a pI of around 7.1.
The decimal reduction time (DRT) to kill 90% of cell present for autoclaving a culture is 1.5 minutes. How long would it take to kill all the cells if 106 cells were present? What would happen if you stopped the heating process at 9 minutes?
Answer:
10.5minutes
Explanation:
DRT = 90%
Cells present = 10^6
Autoclaving = 1.5 minutes
Solution:
10^6(1.5)10^5(1.5)10^4(1.5)10^3(1.5)10^2(1.5)10^1(1.5)10^0(1.5)0=10.5
it would take it approximately 10.5 minutes to kill 10^6 of the cells.
If i should stop the heating process at 9 minutes this would have effect on some of the microbes as they are still present with 1 bacterium left which makes it not efficient.
XR
Can you read this??
Dndkfrjjdfjjd
Answer:
I can't read the picture because it's too pixelated, but "Dndkfrjjdfjjd"
clearly means "Da National Day Known For ReJoicing Joe's Dad For Joyous Jiving Dogs".
What's the difference between a statute and a regulation in the US?
A. Statutes are laws passed by federal agencies, while regulations are laws passed by Congress
B. They're the same thing. Laws and regulations express the same concept.
C. Statutes are laws passed by Congress, while regulations are laws passed by federal agencies
D. Citizens that break the law are subject to heavier penalties, whereas breaking regulations would only result in fines at the worst
Answer:
A. Statues are laws passed by federal agencies, while regulations are laws passed by Congress.
Explanation:
A statute is a law, enacted by the state or federal legislature. Regulations are rules set by agencies that fill in the ambiguous areas of laws
Which of the following statements regarding the human
population are TRUE? Select TWO.(Remember, there is no
partial credit)
SELECT ALL THAT APPLY
The world's population of humans is
increasing.
In every country, the human population is
increasing.
In some countries, the human population is
decreasing or staying the same.
The world's population of humans is
staying constant
Answer:
The world's population of humans is
increasing.
and
In every country, the human population is
increasing.
Enzymes affect the reactions in living cells by changing the
(A Products of the reason
B( Speed of the reaction
C( temperature of the reaction
D(pH of the reaction
According to ______
electrons are added one sublevel at a time.
Answer:
Two electrons are added to one sublevel at a time (Hund's Principle)
An experiment is designed to study the mechanism of sucrose uptake by plant cells. Cells are immersed in a sucrose solution, and the pH of the solution is monitored. Samples of the cells are taken at intervals, and their sucrose concentration is measured. The pH is observed to decrease until it reaches a steady, slightly acidic level, and then sucrose uptake begins. Rank the steps from first to last. To rank items as equivalent, overlap them.
A proton Pump, using ATP, pumps protons outside.
Sucrose moves into the cell.
H+ moves down electrochemical gradient into the cell.
A steady proton gradient with a higher concentration of H+ out of the cell is maintained by the proton pump.
pH decreases.
The gradient becomes sufficient.
Answer:
A proton Pump, using ATP, pumps protons outside
A steady proton gradient with a higher concentration of H+ out of the cell is maintained by the proton pump.
pH decreases;
The gradient becomes sufficient.
H+ moves down electrochemical gradient into the cell; Sucrose moves into the cell.
Explanation:
A proton Pump, using the energy of ATP hydrolysis, pumps protons outside the cell.
A steady proton gradient with a higher concentration of H+ out of the cell is maintained by the proton pump.
The continues outward pumping of protons by the proton pump causes the pH of the extracellular fluid to decrease
At some point the gradient becomes sufficient, and pH reaches a steady slightly acidic level.
H+ moves down its electrochemical gradient into the cell together with Sucrose through the hydrogen ion-sucrose co-transporter.
To rank items as equivalent, overlap them.
E
C
A
D
F
Co-transporterIn this experiment in which the mechanism of sucrose uptake by plant cells immersed in a sucrose solution, and the pH of the solution is monitored, the following steps are ranked in order:
E) pH decreases.
C) H+ moves down the electrochemical gradient into the cell.
A) A proton Pump, using ATP, pumps protons outside.
D) A steady proton gradient with a higher concentration of H+ out of the cell is maintained by the proton pump.
F) The gradient becomes sufficient.
A co-transporter also called a symporter, is a carrier protein that transports a solute and an ion from one side of the membrane to the other at the same time.
The proton pump is an integral protein that builds a proton gradient across a biological membrane.
The cell cannot import sucrose by simple diffusion, the cell expends energy to move the substance against a concentration gradient.
The sodium and potassium maintain the electrochemical gradient of living cells, the direction an ion moves across a membrane is determined by the electrochemical gradient.
Learn more about sucrose uptake:
https://brainly.com/question/559824
When you are sitting in a bath, are your skin cells in a hypertonic or hypotonic solution?
Answer:
hypotonic
Explanation:
5
What is the main idea of this text?
A
No two human microbiomes are the same.
B
The human body is a diverse ecosystem made up of microbes.
C
Some bacteria cause infections and even life-threatening diseases.
D Some scientists think that infants who lack exposure to microorganisms
develop a higher rate of allergies.
Answer:
What is the text?......
Which of the following describes the
cytoskeleton?
A. a web of proteins that gives shape and
support to the cell
B. a membrane-bound organelle that contains
genetic material
C. the outer covering of a cell that separates it
from the environment
D. the structure that contains the information
about how to make a cell's proteins
Answer:
either b or c
Explanation:
its been a while since I took biology but I'm pretty sure its in between those two answers
what is the last thing that happens when a cell divides to produce two new identical cells
Answer:
The last phase of cell division is cytokinesis. In this phase the cytoplasm of parent cell divides in to two cells called as daughter cells. It occurs during late stages of nuclear division.
The visible change of cytokinesis in an animal cell can be observed as formation of Furrow or Pucker on the cell surface.
How do
you think humans can impact the
biosphere by affecting the biogeochemical
cycles?
Answer:
hope this will help u
Explanation:
Biogeochemical Cycles
Human activities have greatly increased carbon dioxide levels in the atmosphere and nitrogen levels in the biosphere. Altered biogeochemical cycles combined with climate change increase the vulnerability of biodiversity, food security, human health, and water quality to a changing climate.
Explore interactions between climate change and biogeochemical cycles.
Answer:
Human activities
moreover, biogeochemical cycles combined with climate change increase the vulnerability of biodiversity, food security, human health, and water quality to a changing climate.
Why do lunar and solar eclipses not happen every month?
Eclipses only occur during full and new moons.
Earth rotates around its axis faster than the moon.
The moon and Earth only travel through the penumbras.
The moon’s axis does not always align with Earth’s shadow.
Answer:
Eclipses only occur during full and new moons. Earth rotates around its axis faster than the moon. ... The moon's axis does not always align with Earth's shadow.
Explanation:
Answer:
The moon's axis does not always align with Earth's shadow.
Explanation:
The Earth goes around the Sun, while the moon goes around the Earth, so all of them lining up exactly doesn't happen that much. I also jus got it right.
Which organelle found in plant cells allows them to make food using sunlight?
lysosome
chloroplast
Golgi body
nucleus
Answer:
Chloroplast
Explanation: Its choloroplast since chloroplasts are sites where photosynthesis takes place.
Please mark as brainliest if you want!
Answer:
its chloroplast
Explanation
I got it right and because Im smart like that.
Explain what would happen if the body's kidneys failed?
A. The body will not be able to produce enough blood.
B. The body will not be able get rid of waste products made by cells.
C. The body will not get sufficient amount of clean water.
D. The body will not be able to dispose of carbon dioxide in the blood.
Answer:
b:) the body will not be able to get rid of waste products made by cells
Explanation:
How far do scientists estimate the plates move in a year
Answer:
10 cm
Explanation:
They can move at rates of up to four inches (10 centimeters) per year, but most move much slower than that. Different parts of a plate move at different speeds. The plates move in different directions, colliding, moving away from, and sliding past one another. Most plates are made of both oceanic and continental crust.
Given what you learned about how influenza changes over time, how could you explain the emergence of drug resistance in bacterial pathogens?
Answer:
Beneficial mutations events can generate resistance to drugs
Explanation:
Bacteria can develop antibiotic resistance through mutations, as well as horizontal transference events, that allow them to reduce/eliminate the effectiveness of drugs used to treat infections. For example, penicillin-resistant strains have been identified in Staphylococcus aureus and Streptococcus pneumoniae. In general, mutations have a negative impact on the fitness of the organism; however, there are cases where mutations increase the fitness of the individual. In consequence, antibiotic resistance may occur by natural selection, where antibiotic-resistant bacteria that exhibit beneficial mutations are selected to survive and perpetuate their genetic material.
Which of the following is an example of a species adapting to changing
conditions in their ecosystem?
A. Amur leopard populations declining because of the spread of humans into their
habitat
B. Longer walrus" tusks because the oysters they eat burrow deeper into the sea floor
Answer:
b
Explanation:
their tusks allow them to get food which is an adaptation for survival
Answer:
The correct answer would be B.
Explanation:
B is the correct answer because the walrus's tusks gives them an advantage to capture the oysters that are deep in the sea floor.
3. A plant cell (0.9% NaCl) is placed into a solution of 20% NaCl, the membrane is permeabl
water. What happens to the plant cell?
4. A plant cell (0.9% NaCl) is placed into a solution of 100% DI water, the membrane is
permeable to water. What happens to the plant cell?
o
w
Answer:
3. the water inside the plant cell will diffuse out from the cell following the concentration gradient. cells will be plasmolysed.
4. distilled water will diffuse into the cell following the concentration gradient. cells will be turgid
what does carbon footprint mean???
Answer:
A carbon footprint is the total greenhouse gas emissions caused by an individual, event, organization, service, or product, expressed as carbon dioxide equivalent.
Explanation:
Answer:
The amount of carbon dioxide a person produces
Explanation:
The process of photosynthesis requires the starting materials
Answer:
Carbon Dioxide, Water, and sunlight
Explanation:
Answer:CO2 and H2O
Explanation:
If the scientific name of the tiger is Panthera tigris then: to what genus do tigers belong?
What 3 molecules, bonded
together, create a single link in the DNA chain
Answer:
nucleotides, phosphate, sugar (for a better explanation go to google and that should help you! I hope this helps you)
How do organisms affect one another's survival and environment ?
How are the enzymes that nerve cells produce different from the enzymes that blood cells produce? A. The molecules that nerve cells digest are more complex than those digested by blood cells. B. The genes that are activated in nerve cells are different from those activated in blood cells. C. Nerve cells contain more ribosomes than blood cells. D. Nerve cells contain more mitochondria than blood cells.
Red blood cells carry a specific type of protein, called hemoglobin, which is able to bind oxygen and release it in other tissues. A nerve cell doesn't have this protein because it doesn't need to bind oxygen. Instead, the nerve cell uses other proteins that help it transmit signals to other cells.
Considering the role of coenzyme Q, how do you think this product might function to benefit the heart?
Answer:Coenzyme Q10 has a crucial role of transporting molecules when electron transport chain takes place this is highly effective in enhancing aerobic respiration which results to a constantly supply of oxygen to the heart like when you exercise and effective aerobic respiration boost the function of the heart
Explanation:
1. Your arm is made up of four different types of
Answer:
joints or muscles
Explanation:
Answer:
Tissues
Explanation:
connective, muscle, epithelial, and nervous tissue.
Do the same mechanisms that govern gene expression operate in bacterial cells and eukaryotic cells? Explain your answer.
Answer:
in prokaryotic cells, the control of gene expression is mostly at the transcriptional level. ... Eukaryotic gene expression is regulated during transcription and RNA processing, which take place in the nucleus, and during protein translation, which takes place in the cytoplasm.
What evidence supports the LAW OF CONSERVATION OF ENERGY?
1. Mechanical energy is converted to chemical energy during photosynthesis
2. Energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis
3. Oxygen is made from the breakdown of carbon dioxide during photosynthesis
4. The sun gives off light energy that is absorbed by plants
The evidence that supports the law of conservation of energy is as follows: mechanical energy is converted to chemical energy during photosynthesis.
LAW OF CONSERVATION OF ENERGY:The law of conservation of energy states that energy can neither be created nor destroyed but is changed from one form to another. This means that energy involved in chemical reactions and natural phenomena is recycled by transformation and doesn't get destroyed. A typical example that obeys this law is photosynthesis, which converts mechanical energy in sugar molecules to chemical energy in ATP.Learn more about law of conservation of energy: https://brainly.com/question/2264339
Answer: The Answer is 3. Oxygen is made from the breakdown of crabon dioxide during photosynthesis.
Explanation: I took the test.
The uterus has three parts. Which one of the following is NOT one of the parts of the uterus?
Question options:
A. Corpus B.Fimbrus C.Fundus D.Cervix
Answer:
My ans is Letter B. Fimbrus
Answer: B. Fimbrus
This is not part of the uterus.
Hope this helps!