What will be the effect of the damaged DNA? The role of p53 in regulating cell cycle prpgression in response to DNA damage
Answer:
Damaged DNA causes an increase in the number of mutations in the cell: this is extremely dangerous for the body and in fact this process is at the basis of the birth of cancer cells.
To avoid this, the cell is equipped with some molecular protective systems including the activation of the p53 protein. p53 induces recruitment of DNA damage repair systems and stops cell replication until the damage has been repaired. If the damage cannot be repaired p53 induces cell death through apoptosis
How can a change in structure to an organisms' cell negatively effect that organism?
what gift did dr paricia get her mother
alfred hershey and martha chase designed an experiment to determine the chemical makeup of griffith's transforming principle. define the term bacteriophage and explain why this organism was a good choice for this particular experiment. describe the procedure of the experiment using the terms bacteriophage, DNA, and proteins in your answer. Describe the results of the experiment and connect them to hershey and chases conclusion
Answer:
Bacteriophages (phages) are viruses that infect only bacteria and do not infect mammalian or plant cells. Phages are ubiquitous in the environment. Phages or bacteriophages were chosen as a model system for their simplicity, as they only contained protein-coated nucleic acid. Alfred D. Hershey and Martha Chase (who were part of the bacteriophage group) in 1952 studying the infection of the bacterium Escherichia coli by the T2 phage show that the information definitely resides in the DNA. They used phage with either [32P] -labeled DNA or [35S] -labeled proteins to infect the bacteria. Immediately afterwards, they centrifuged the sample so that the infected bacteria remain in the pellet and the virus capsids (proteins) remain in the supernatant. [35S] is found in the supernatant, whereas [32P] is found in bacteria. After one cycle of infection, it was observed that when phage labeled in the [35S] proteins were used, only 1% of the radioactivity was incorporated into the progeny. But when phages were [32P] labeled, more than 30% of the radioactivity was in the progeny. They showed directly that what is transmitted from one progeny to another is the DNA and not the proteins, despite having first "diluted" in a bacterium.
Explanation:
Bacteriophages are viruses that infect bacteria in a specific way. Bacteriophages, like other known viruses, are found in an intermediate zone between living organisms and inert matter. Bacteriophages bind to the host pathogenic bacterium, introduce their genetic material, replicate inside it and destroy it. Hersey, along with his assistant Martha Chase, used phages because they knew that T2 phages were made up of 50% proteins and 50% nucleic acids and that phages entered bacteria and reproduced. As the progeny carried the same infection traits, the genetic material of this had to be transmitted to the offspring, but the mechanism was unknown. These scientists carried out an experimental work with the T2 virus, a bacteriophage that infects the bacterium Escherichia coli, which it reproduces by attaching itself to the outer wall of the bacterium, injecting its DNA into it where it replicates and directs the synthesis of the phage's own proteins. Phage DNA is encapsulated within proteins and produces phages, which lyse or disrupt the cell and release phage from progeny. They infected a culture of bacteria with radioactively labeled phages: the protein coat with sulfur (35S) and its DNA with phosphorus (32P). After infection, they separated the phages from the bacteria by violent shaking using a mixer (hence the name of the experiment). By centrifugation the much smaller phages remained in the supernatant and the much larger bacteria in the pellet. 85% of the radioactivity corresponding to DNA appeared in the pellet and 82% of the protein in the supernatant. This result supported the idea that DNA was the only component of the bacteriophage that penetrated the interior of the bacteria and, having the ability to form new phages, constituted the genetic material.
Please help with all three will mark brainliest
Answer:
cells and tissue are the most basic level
then it is the bladder as it is connected to the kidney
and then the muscular system as it is chewing
Explanation:
What scientist discovered the process of transformation?
Answer: Fred Griffith
Explanation: :)
12 Rachel is analyzing a DNA sample to identify its base pairs. Her results show that
40% of the sample is adenine. Which other base makes up 40% of the sample?
A cytosine
C thymine
B guanine
Duracil
Answer:
thymine
Explanation:
Adenine binds to thymine in a DNA and with uracil in RNA
can someone put these in the right order ? IM GIVING BRAINLIEST ANSWER FOR THIS PLEASE! i inserted a picture ) thanks so much I need this fast as possible
Answer:
chlorine (17)
nitrogen (2,5)
magnesium (12)
lithium (2,1)
Explanation:
1. chlorine
2. magnesium
3. nitrogen
4. lithium
29. A teacher presented the two models below to the dass. The models represent a eukaryote and prokaryote cell. The teacher asked the students to label the structure of each cell that contains the genetic code and
tell where it is located.
structure C, located in the cytoplasm in Cell A and structure C, located in the cytoplasm in Cell B
structure H, located in the cytoplasm in Cell A and structure A, located in the nucleus in Cell B
structure C, located in the nucleus in Cell A and structure C, located in the cytoplasm in Cell B
structure H, located in the cytoplasm in Cell A and structure A, located in the cytoplasm in Cell B
Answer:
C. structure C, located in the nucleus in Cell A and structure C, located in the cytoplasm in Cell B
Explanation:
This question contains images that depicts an eukaryotic cell (animal) and a prokaryotic cell (bacteria). According to the question, a teacher asked the students to label the structure of each cell that contains the genetic code (DNA) and tell where it is located.
In an eukaryotic cell, the genetic material (DNA) which contains the genetic code is located inside a well defined membranous structure called NUCLEUS while the genetic material in a prokaryotic cell is found naked in a region of the cytoplasm called NUCLEOID as they lack a membrane-bound nucleus. Based on this explanation;
- Structure C is the genetic material (DNA) which contains the genetic code of cell A (eukaryotic cell), hence, the genetic code of cell A is found in structure C, which in turn is located in the centrally-placed NUCLEUS.
- Structure C is the genetic material containing the genetic code of cell B (prokaryotic cell), hence, the genetic code of cell B is found in structure C, which in turn is located in the CYTOPLASM.
An advertisement for a health supplement is being shown in a commercial explaining the benefits of increasing lean muscle, strengthen tendons, and ligaments. It also includes a fat burner that will increase the breakdown of triglycerides. Which two biomolecules are being discussed in this ad?
carbohydrates and lipids
lipids and nucleic acids
proteins and carbohydrates
proteins and lipids
Answer:
C. Proteins and carbohydrates
Which level of organization forms the fundamental base for all other levels
in the hierarchy of life? *
Cell
O Tissue
Organ
Organism
Answer:
organ
Explanation:
The highest level of organization for living things is the biosphere; it encompasses all other levels. The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.
The biological level of organisation range from organelle to biosphere. Therefore, option (A) cell forms the fundamental base.
What do you mean by hierarchy of life ?Cells join to form tissues in larger animals, which are clusters of similar cells performing similar or related jobs. Organs are groups of tissues that work together to fulfill a certain task. Organs can be found in both plants and animals. An organ system is a more advanced level of organization made up of organs with similar functions.
A population is the aggregate term for all members of a species that are present in a given location. An ecosystem is made up of all the living things that exist in a specific location as well as the abiotic, non-living elements of that environment, such as soil nitrogen or rainwater. The biosphere is a group of organisms that is organized at the highest degree possible.
Thus, option (A) cells forms the fundamental base for all other levels
in the hierarchy of life.
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White blood cells ingest, then digest, a number of bacteria and other pathogens. White blood cells would require high numbers of which organelle in order to function properly?
Answer:
Lysosome
Explanation:
what is a population?
Some students conduct an investigation in a biology lab by setting up four different artificial stomachs, each in a
40 °C water bath. The students place the same amount of boiled egg white, a protein-rich source, in each stomach.
They also add dilute hydrochloric acid, HCl, and pepsin, a digestive enzyme, to each stomach, as shown in the table.
The students observe the mass of egg white in each stomach every 15 minutes.
Which statement describes the most likely result of this investigation?
A. The mass of the Egg white increases as the volume of the enzyme increases.
B. The egg white is unaffected by the differing amount of enzyme.
C. Digestion decreases in each stomach as more of the egg white's surface area becomes exposed.
D. Digestion increases as the volume of the enzyme increases.
Answer: D. Digestion increases as the volume of the enzyme increases.
Explanation:
Enzymes speed up reactions by reducing the activation time of a reaction. If there are more enzymes therefore, the reaction will move faster.
Pepsin is an enzyme that prefers acidic conditions so it can work with dilute HCL. It can also work in temperatures of 40 °C without getting denatured. As more Pepsin is added therefore, the reaction will move faster and digestion will increase.
Answer: The answer would be D!!
Explanation:
True or false. Without wind there would be no weather.
Answer: Absent a gentle breeze or mighty gale to circulate both warm and cold weather around the Earth, the planet would become a land of extremes. Areas around the Equator would become intensely hot and the poles would freeze solid. Whole ecosystems would change, and some would completely disappear.
Overtime, plants will compete, and recreate the forest.
This principle is known as...
?????
Answer:
ecological succession
Explanation:
Answer:
Ecological succession
Hi all!
Pls help me in these 2 simple questions.....
Thanks in advance!
Answer:
pollination is the transfer of pollen grain from Male part to female part of flower
two types of pollination
1. self pollination
2.cross pollination
it is important for plant existence
What is needed for a fossil to form? Select all that apply.
1. The organism must first get stuck in rock.
2. The soft tissue of the dead organism must be eaten by scavengers before the bones can be preserved.
3. The tracks or burrows of an organism must be filled with sediments before they are disturbed.
4. The organism's body must be covered by sediment or another substance before its body decays.
The correct answer is:The organism's body must be covered by sediment or another substance before its body decays.
What is the explaining statement for the same ?Explanation: For a fossil to form, the organism's body must be rapidly buried in sediment, ash, or another substance before it can decay or be eaten by scavengers.
Over time, the minerals in the surrounding sediment or substance can replace the organic material in the bones, forming a fossil. Tracks, burrows, and other trace fossils can also form when sediment or another substance fills in the impressions left by an organism before they are disturbed.
Getting stuck in rock is not necessarily a requirement for fossilization, as fossils can also form in sedimentary rock or other types of rock.
Lack of oxygen: Decay requires oxygen, so organisms are more likely to fossilize in environments where oxygen is limited or absent, such as in deep water, bogs, or quicksand.
Low acidity: Acidic environments can dissolve bones and other hard parts, so fossils are more likely to form in environments with neutral or basic pH levels.
Lack of disturbance: Fossils are more likely to be preserved if they are not disturbed after burial. For example, if an organism's body is exposed to air or water before it can be buried, the bones may be scattered or destroyed.
Overall, fossilization is a rare and complex process that requires a combination of specific conditions to occur. As a result, the fossil record provides only a partial and biased glimpse into the history of life on Earth.
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The kingdom that does contain autotrophs is
A. Archae
B. Eubacteria
C. Plantae
D. Fungi
Answer:
The answer is C. the Plantae Kingdom.
Explanation:
They are multicellular, autotrophic organisms.
Answer:
D
Explanation:
The kingdom that does contain autotrophs is Fungi.
1. Insects Have three pairs of legs or are the ______ arthropods.
4. ______ have two body segments and have no antennae
6. Butterfly is an exxample of an _______
7. This animal is an example of exoskeleton.
8. _____ are invertebrates that people can eat
9. _____ is an example of shellfish.
10. Snail is an examole of _____
pick your answer below
-eight
spiders
worm
snail
shrimp
six legged
antennae
mollusks
insects
shellfish
Answer:
1. Six legged
4. Spiders
7.snails
8. Shrimp
9.Mollusks
10.worm
Explanation:
Insects have three pairs of legs or are the six legged arthropods.
What is a arthropod?
Invertebrates with an exoskeleton, segmented bodies, and paired jointed appendages are known as arthropods. Arthropods are classified as members of the phylum Arthropoda.
They are distinguished by their jointed limbs and cuticle, which is frequently mineralized with calcium carbonate. Arthropods have an external skeleton and are bilaterally symmetrical.
1. Insects have three pairs of legs or are the six-legged arthropods.
4. Spiders have two body segments and have no antennae.
6. Butterfly is an example of an insect.
7. This animal is an example of exoskeleton- Snail
8. Shrimp are invertebrates that people can eat.
9. Mollusks is an example of shellfish.
10. Snail is an example of worm.
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This dichotomous key helps scientists classify within the arthropoda phylum. If scientists discover an organism with: less than 10 legs, 6 legs, wings, wings with 1 or 2 colors, with legs that are approximately the same length, wings that are not net-like, and wings that meet in a straight line down the back, how would this organism be classified?
You'll have to follow the dichotomous key that's provided to you. Start by choosing less than 10 legs, then choose 6 legs, then with wings, then wings with 1 or 2 colors... etc. You should end up identifying an organism this way.. following the path.
Earliest eon of the earth's history
A. Cenozoic Era
B. Precambrian
C. Trilobite
D. Mesozoic Era
Answer: the Mesozoic era came before the others however the accurate earliest eon is the Hadeon to be exact, but from the options you provided, answer it D.
Explanation:
Explain what other steps need to be taken to demonstrate that each of these factors is needed for photosynthesis.
light
What are some examples of climatic conditions that support certain species and inhibit others?
Answer:
The cold temperatures, snow and ice, lack of daylight in winter and lack of darkness in winter, make good conditions for the survival of polar bears, seals, caribou, etc., but seriously prohibit the survival of mosquitoes and most other insects.
Explanation: Here's your answer, hopefully this will be help!
The examples of the climatic conditions that support certain species and inhibit others involved the snow, ice, etc.
Examples of the climate conditions:The cold temperature, snow, and ice, absence of daylight in the winter season, and absence of darkness in winter seasons resulted from the polar bears survival.
But at the same time, it restricts the mosquitoes and other insects survival.
So the above are the examples.
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How does the mining industry make use of bacteria?
Answer:
Using Bacteria such as Acidithiobacillus ferrooxidans to leach copper from mine tailings has improved recovery rates and reduced operating costs. Microbial leaching is especially useful for copper ores because copper sulfate, as formed during the oxidation of copper sulfide ores, is very water-soluble.
Explanation:
Answer:
hope it helps. hear is the answer
Do plants complete cellular respiration like humans to create energy?
Answer:
Yes
Explanation:
Cellular respiration is the process of using the chemical energy stored in sugars. The reaction is the mirror image of photosynthesis: glucose, + oxygen yields carbon dioxide +water. Like all living things, plants go through cellular respiration to obtain energy for growth and reproduction.
how would this affect the cells made from the cell cycle? passage: timmy has a disease that effects his cell cycle, it causes the S phase (part of interphase) to not work correctly.
Answer:
No cells are produced.
Explanation:
If the S phase of cell cycle did not work properly, the cells produced are abnormal or no cells are produced because no extra copy of chromosomes are present for cell division. If there is no extra copy of chromosomes is present in the cell, the cell will not go to the G2 phase and as a result the cell cycle is remain incomplete. So that's why we can say that no cells are produced if S phase did not work properly.
What are three methods scientists use to study past climate conditions?
PLEASE HELP ME GDSJFD
Answer:
paleaclimatology
Explanation:
this is method...
A healthy lifestyle is important because
A) people cannot control their genetic traits
B) lifestyle choices are the most important factor in disease prevention
C) unhealthy lifestyles lead directly to toxic environments
D) all of the above
Answer:
C
Explanation:
If your not carefull who you're around you can get hurt or i dont known how to explain it
Answer:
A
Explanation:
A new litter of pupples was born. The pupples in the litter do not all look the same, which can be seen
In the picture.
Rom
Which part of the cell contains the information that controls the traits of these dogs?
Helpppppp
WILL GIVE BRAINLY
Answer:
Explanation:
A