Final answer:
The Hershey-Chase blender experiment led by Hershey and Chase involved radiolabeling T2 bacteriophage DNA with 2P and proteins with 5S. They demonstrated that DNA, not protein, is the genetic material as radioactive DNA was found inside bacterial cells and the genetic information was used to produce new viruses.
Explanation:
The Hershey-Chase blender experiment was a crucial study in molecular biology, conducted by Alfred Hershey and Martha Chase, to determine whether DNA or proteins were the genetic material responsible for heredity. Hershey and Chase used T2 bacteriophage, a virus that infects bacteria, for their experiments. They grew the viruses in cultures containing radioactive isotopes: 2P for DNA and 5S for proteins, since DNA contains phosphorus but no sulfur and vice versa for proteins. The viruses thereby incorporated these isotopes into their DNA or proteins, respectively.
Two separate sets of E. coli bacteria were then infected with the radiolabeled phages. After allowing the phages to attach to the bacteria, the mixtures were placed into a blender to separate the phage coats from the E. coli cells. The mixtures were then centrifuged, so the heavier bacteria formed a pellet, and the lighter phage particles and detached coats remained in the supernatant. In the set with 5S-labeled proteins, the radioactivity was found in the supernatant, indicating that the protein did not enter the bacteria. Conversely, in the set with 2P-labeled DNA, the radioactivity was detected in the pellet, indicating that the DNA entered the bacteria and therefore was the material responsible for directing the production of new phage particles. Thus, Hershey and Chase concluded that DNA is the molecule that carries genetic information.
which research question about the largemouth bass and whirligig beetle would best match the scientists' observations?
a.how log do fish spend rinsing their food?
b.what is the favorite food of a larrgemouth bass?
c.which insects produce the most foul-tasting substances?
d.does the slow release of a foul-tasting substance increase survival?
The weather department in Richmond is forecasting a snowstorm. What is likely to happen to the barometer and thermometer readings in Richmond?
A. Barometer readings will decrease, and thermometer readings will increase.
B. Barometer and thermometer readings will increase.
C. Barometer and thermometer readings will decrease.
D. Barometer readings will increase, and thermometer readings will decrease.
E. Barometer and thermometer readings will not change.
The correct answer is option D. Barometer readings will increase, and thermometer readings will decrease.
The barometers are the devices, which are used for the measurement of the pressure and the thermometer is a device, which is used for the measurement of the temperature. During snowstorm, the temperate is decreased and the pressure is high. So, the reading on the thermometer would decreased, and the reading on the barometer would be increased.
Answer:
D.
Explanation:
If matter cannot be created or destroyed within the physical universe, then the total quantity must be _____????????
The pictures below show a cave and a geyser.
Which of these statements is correct about the cave and geyser shown in the pictures?
a. Both are formed when groundwater gets heated.
b. Both are formed when groundwater reacts with the limestone in rocks.
c. The cave is formed when groundwater reacts with the limestone in rocks and the geyser is formed when groundwater gets heated.
d. The cave is formed when groundwater gets heated and the geyser is formed when groundwater reacts with the limestone in rocks.
Answer:
c
Explanation:
Imagine that a chromosome contains the following chromosome order ZYXWVUT. What type of mutation happens to produce ZYXWWVVUT?
Chemical reactions that release energy are______________________
Characteristics we use to tell the difference between kinds of matter are called ____________ properties.
The blank would be physical
hope this helps have a great day
if a codon in RNA was GAC, what would it's copy be?
Electrons are excited in photosystem I. With what do these electrons combine to produce an energy-carrying molecule?
A.ADP
B.Glucose
C.ATP
D.NADP+
Transcribe the following DNA to RNA
DNA A G T C C T A T G A C C
mRNA ___________________________________
Which of these is not a component of the cell membrane? question 19 answers phospholipids rna cholesterol proteins?
A shark's skeleton is different from a goldfish because
a. the shark's skeleton is very dense.
b. the shark's skeleton is quite rigid.
c. the shark's skeleton is composed of bone.
d. the shark's skeleton is composed of cartilage.
Which of the following could be a nucleotide of DNA?
deoxyribose + phosphate group + thymine
deoxyribose + phosphate group + uracil
ribose + phosphate group + thymine
ribose + phosphate group + uracil
Why must organisms of the estuary be adapted to varying levels of salinity? A.Fresh river water flows into the estuary
B.Saline ocean water flows into the estuary
C.Ocean tides increase and decrease the amount of ocean water
D.All of the above
Organisms in estuaries must adapt to varying levels of salinity due to the unique environment where fresh river water and saline ocean water meet, creating varying and changing salinity levels. Fresh river water, saline ocean water, and ocean tides all contribute to these salinity changes.So, the correct answer is D. All of the above.
Explanation:Organisms in the estuary must be adapted to varying levels of salinity because of the unique factors of their environment. The estuary is a transitional zone where fresh river water meets marine or saline ocean water. This creates varying levels of salinity, which can even change with the tides. Therefore, organisms living there have to adapt to this ever-changing salinity environment.
This happens because of a combination of the factors mentioned in options A, B, and C. Fresh river water from inland sources flows into the estuary (option A), increasing the freshwater content. On the other hand, saline ocean water also flows in (option B), increasing the salinity. Furthermore, the rise and fall of ocean tides can increase and decrease the amount of saline water entering the estuary (option C). So, the correct answer is D. All of the above.
Learn more about Estuary Adaptation here:https://brainly.com/question/26768445
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Which of these processes is used to break down glucose into ATP that is usable by the cell?
A) chemosynthesis
B) photosynthesis
C) respiration
D) transpiration
Because of when the chromosomes pair up during meiosis, crossing-over must occur during
Why did Gregor Mendel conclude that the genes for flower and seed color in pea plants independently assorted even though both traits are on the same chromosome?
Crossing over occurred frequently.
The genes are not considered linked.
The genes are very far apart on the chromosome.
All of the above are correct.
Explain why molecules held together by covalent bonds don't have electrical charges
A good example of something that is biodegradable is __________.
a leaf in a compost pile
a plastic milk jug in a landfill
a plastic six-pack can holder in an estuary
a polystyrene burger container in a trash can
Create a sentence explaining how amino acids form proteins
Amino acids are monomers that combine to form polymers called proteins.
What disease causes an imbalance of the blood glucose levels
Which of the following is an indicator of good water quality?
High levels of nitrates
High levels of phosphates
All of the above
Zero turbidity
I would think that it is B. Nitrates can be a form of pollution and D is usually from the speed of the water moving.
Answer:d
Explanation:took test
Fish, trees, and animals are important wildlife resources that we depend on for survival. Fish are a main source of food for many of the people in the world. Trees have been used to build and heat homes, make paper, and provide food for centuries. Humans hunt land animals such as deer, fox, antelope, and buffalo for food and other products. What can we do to protect wildlife resources so they will be around for future generations?
Answer:
harvest fast-growing trees, impose fishing limits, and impose laws to prevent poaching and illegal hunting
Explanation:
i got it right
Competition occurs between species when _____.
they fight for mates
their niche is destroyed
they try to share the same niche
a new niche becomes available
Answer: The correct answer for the fill in the blank is- They try to share the same niche.
According to competitive exclusion principle, two species when present in the same area, try to compete for the same limiting resource like food. The species having better advantageous trait over the other survive and exclude the other one. In other words, the second species is either eliminated or shifts to some other niche.
This principle is also called Gause's principle.
Thus, competition occurs between two species when they try to share the same niche.
Answer:
they try to share the same niche
Explanation:
Cells of a multicellular organism are specialized. What does this statement mean?
A.
Cells of a multicellular organism can perform all the life functions the organism needs to survive.
B.
Cells of a multicellular organism perform all life functions but not at the same time.
C.
Cells of a multicellular organism are adapted for performing a specific function.
D.
Cells of a multicellular organism are specialized because they have a complex structure.
What does it mean if a scientist fails to reject a hypothesis?
You visit a farm and notice that white chickens lay white eggs and colored chickens lay brown eggs, so you decide that only white chickens lay white eggs. What type of reasoning is this?
a) inductive
b) deductive
Answer
Inductive
Explanation
Its a logical process in which a number of premises all believed true or sometimes found true most of the time and combined to come up with specific conclusions. Its mostly used in applications that do involve behavior, forecasting and makes broader generalization that is considered probable. For example a speculation that all crows are black and each time a new crow is observed and found out that its black the assumption is increasingly confirmed. On the other hand if the crow is found not to be black then the assumption's found to be false..
2. Which organelle acts like the “brain” or control center of the cell?
Select all that apply.
Problems with solar energy include _____.
the inability of current technology to capture large amounts of the Sun's energy
the inability of current technology to store captured solar energy
inconsistencies in the availability of the resource
lack of demand for solar energy
I just turned in my assignment and the answers are:
"the inability of current technology to capture large amounts of the Sun's energy"
"the inability of current technology to store captured solar energy"
"inconsistencies in the availability of the resource"
Hope this helps! :)
The element hydrogen has three naturally occurring isotopes, H-1, H-2, H-3. What is the number of protons, neutrons, and electrons in H-3, or tritium?
Answer:
Tritium is one of the three isotopes of hydrogen which contains 1 proton, 2 neutrons, and 1 electron. Out of three isotopes, protium is the most abundant isotopic form of hydrogen constituting about 99.98 % of total isotopic form.
Tritium is a radioactive isotope of hydrogen having a half-life period of 12.3 years which is produced as a byproduct of fission in a nuclear explosion. Naturally, it occurs in a very trace amount.
It emits the beta particle which is having very low energy so cannot penetrate the skin but can be hazardous if inhaled or get absorbed in the skin.