Answer:
A bacteriophage attaches itself to a susceptible bacterium and infects the host cell. Following infection, the bacteriophage hijacks the bacterium's cellular machinery to prevent it from producing bacterial components and instead forces the cell to produce viral components.
The gel below shows a result of the experiment you designed using the DNA of three different individuals (S1-S3). It also shows a negative (C-) and a positive (C ) control, as well as a DNA marker. Why did S2 have three bands
Restriction enzymes recognize specific nucleotidic sequences. The molecule with no recognition site will not be digested. Individual S2 probably had molecules with the recognition site and others with a different sequence.
--------------------------
A restriction enzyme is a degradative polymer that recognizes and cuts up specific nucleotide sequences in DNA.
Restriction enzymes can produce cohesive cuts or blunt (abrupt) cuts, depending on the recognition sites.
The frequency in which the restriction enzyme will produce the cuts depends on the recognition sequences and the number of bases that compose them.
So restriction enzymes cut DNI molecules into different short sequences of varying lengths.
These pieces are called minisatellites and exhibit the existing variation from one person to the next.
These short sequences can be separated by using gel electrophoresis and will express a pattern of differentiation.
When the nucleotidic sequence of the DNA molecule does not include the recognition site, the enzyme will not cut this fragment. The enzyme does not digest this molecule.
Since the negative control does not have a recognition site, it is not digested by the enzyme.
The positive control is digested, meaning that these molecules carry the recognition site.
Probably DNA molecules from individual S1 do not have the recognition site either.
The enzyme recognizes the sequence in DNA from individual S3 and cuts it into two fragments.
The lane of Individual S2 includes both options: digested and not digested DNA. This means that the sample taken from this individual included DNA
⇒ carrying the sequence, and
⇒ not carrying the recognition sequence.
So enzymes digest molecules carrying the recognition sequence, and the other ones remain undigested.
Probably, individuals S1 and S3 are h0m0zyg0us, while individual S2 is heter0zyg0us.
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Answer:
Wrong category
Explanation:
Years ago, farmers determined that suppressing flower development in the wild mustard plant gave rise to the plant we know as broccoli. This is an example of ________.
To get the best from their produce, farmers tend to alter the features of the crops they have presently. The phenomenon that explains the action taken by the farmers above is;
Artificial SelectionArtificial Selection is the process of choosing desirable traits from plants and animals with the view of getting a new generation that is healthier and that possesses much better features.
In the case of the farmers above, they effected artificial selection by suppressing flower development in the wild mustard plant thus giving rise to broccoli which had more desirable features.
Therefore, the answer, artificial selection is correct.
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If dna is colorless when dissolved in water, how were you able to see the dna after it ran through the gel?.
Answer:
To visualise the DNA, the gel is stained with a fluorescent dye that binds to the DNA, and is placed on an ultraviolet transilluminator which will show up the stained DNA as bright bands. Alternatively the dye can be mixed with the gel before it is poured
Explanation:
HELP ASAPPP
Describe any other local examples of relationships between organisms that may influence population numbers?
Answer: trees, flowers, bees
Explanation:
Which objects would cause refraction of light? (Select all that apply.)
prisms
magnifying glasses
wooden boxes
eyeglasses
Answer:
prisms
eyeglasses
Explanation:
i new the answer
have a great day ;)
Imagine you are in a biology class and you are dissecting the eye of an animal that hunts at night. What prediction would you make about the retina of this animal
Answer:
Explanation:
This animal would have a large number of rods.
12. Which is NOT a natural cause of extinction?
A. Disease
B. Catastrophic events
C. Introduction of new species
D. Competition due to overpopulation
24. Which is NOT true about energy transformation?
A. Energy is essential to all organisms.
B. Food contains energy that is needed by all organism.
C. Heterotrophs feed on autotrophs and other heterotrophs to gain energy.
D. Autotrophs do not need energy because they can produce their own food.
23. Which is the CORRECT sequence of events in cellular respiration?
A. Glycolysis - fermentation - Krebs Cycle
B. Glycolysis - Krebs Cycle - Electron Transport
C. Krebs Cycle - Electron Transport - Glycolysis
D. Krebs Cycle - Glycolysis - Electron Transport
2. In humans there are four types of blood; type A, type B, type AB and type O. A person with a genotype of IaIa or Iai will have blood type_____?
A. A
B. B
C. O
D. AB
4. A couple has four children, one son and three daughters. What is the chance that the fifth child will be a daughter?
A. ¼
B. ½
C. ¾
D. 1/5
22. Cellular respiration releases energy by breaking down_______.
A. ATP
B. water
C. carbon dioxide
D. food molecules
5. A man is colorblind but there is no history of this disorder in his wife’s family. What is the chance that their son is color
blind?
A. 0
B. 25%
C. 75%
D. 100%
25. Which BEST summarizes the process of respiration?
A. Water + Carbon Dioxide ( light) sugar + oxygen
B. Sugar + Oxygen (enzymes) water+ carbon dioxide +energy
C. Water + Sugar ( light ) carbon dioxide + oxygen
D. Oxygen + Water (enzymes) sugar + carbon dioxide + energy
1. A father with blood type AB and a mother with blood type O will probably produce offspring with a blood type ___. *
A. A
B. B
C. A or B
D.AB or O
6. What is a sex- linked trait that results in the inability to have normal blood clotting?
A. baldness
B. color blindness
C. diabetes
D. hemophilia
11. What causes species extinction?
A. Pollution and reforestation
B. Reforestation and carbon emission
C. climate change and over consumption
D. conservation and consume
18. The pigment molecules responsible for photosynthesis are located in the _______? *
A. Mitochondria
B. Cytoplasm of the cell
C. Stroma of the chloroplasts
D. Thylakoid membrane of the chloroplasts
13. Which part of a leaf contains most of the chloroplasts?
A. Lower epidermis
B. Palisade mesophyll
C. Spongy mesophyll
D. Upper epidermis
19. At optimum light intensity, which atmospheric gas most directly influences the rate of photosynthesis?
A. Nitrogen
B. Oxygen
C. Sulfur
D. Carbon Dioxide
14. What part of the leaf is this tiny opening in the lower epidermis which makes it rough and responsible for the entrance and exit of gases in plants?
A. xylem
B. phloem
C. stomata
D. guard cells
16. In which part of the chloroplast does light reactions of photosynthesis takes place?
A. Grana
B. Stroma
C. Inner membrane
D. Outer membrane
17. Which is NOT needed to make food in plants?
A. Flower
B. Sunlight
C. Chlorophyll
D. Carbon Dioxid
8. Color-blindness is inherited as a sex-linked recessive trait. If a normal woman, carrier of the gene marries a man with normal color vision. What would be the expected phenotype of their children with reference to color-blindness?
A. All color-blind
B. 2 carriers, 2 color-blind
C. 1 normal, 3 carriers
D. 2 normal, 1 carrier, 1 color-blind
3. Blood type O has both antibodies A and antibodies B in the plasma but has no antigen on its erythrocytes or red blood cells. That is why Blood Type O is considered UNIVERSAL______.
A. Blood
B. Donor
C. Marker
D. Recipient
7. Melvin’s thinning hair is like that of his father. This characteristic of baldness is due to
A. multiple alleles
B. sex-linked
C. sex-influenced
D. sex-limited
Answer:
A bowling ball weighs 15 pounds on Earth and weighs 4 pounds on the planet Saturn. You could determine a 100–pound earthling's weight on Saturn using the proportion:
Explanation:
a.
StartFraction 15 Over 4 EndFraction = StartFraction b Over 100 EndFraction
c.
StartFraction 4 Over 15 EndFraction = StartFraction 100 Over b EndFraction
b.
StartFraction 15 Over 4 EndFraction = 100 Over b EndFraction
d.
either a or c
Which cell makes a pigment that absorbs uv light.
Answer:
Explanation:Melanin
Answer:
Explanation:
Recall that melanin is produced by cells called melanocytes, which are found scattered throughout the stratum basale of the epidermis. The melanin is transferred into the keratinocytes via a cellular organelle called a melanosome
the ames test is used to determine whether or not a compound causes __________.
Answer:
mutations
Explanation:
the ames test is used to determine whether or not a compound causes mutations in DNA
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*30 POINTS* PLZ HELP
The following list of events happens during meiosis:
Prophase I: Crossing over between homologous chromosomes occurs.
Metaphase I: Tetrads line up at the metaphase plate.
Anaphase I: Tetrads are separated.
Telophase I: Nuclear envelopes reform around the separated chromosomes.
Prophase II: Chromosomes condense.
Metaphase II: Chromosomes line up at metaphase plate.
Anaphase II: Sister chromatids separate into daughter chromosomes.
Telophase II: Nuclear envelopes reform around the daughter chromosomes.
Identify the answer choice that correctly lists the events from above that lead to new genetic combinations in the gametes.
(1 point)
1, 2, and 5
5 and 6
5, 6, and 7
1 and 2
Answer:
let me take the test i will tell you after
Explanation:
Explain what must happen before a cell can divide
Answer:
the cell must go through mitosis and chromosomes in the nucleus must double
help plssss
What unicellular protists have shells?
Answer:
Foraminifera (forams for short) are characterized as unicellular protists that have shells
examine the importance of your role as part of the family and community
Answer:
The important role of the family is communicating with each other, understanding,helping, and love my family
The important role of community help people how's need help, make my community clean and fresh
Hope it helps!
Transformed bacteria are plated on LB plus ampicillin to determine which cells were successfully transformed. Which part of the pGLO plasmid is responsible for the growth of transformed cells despite the presence of ampicillin
Answer:
The gene that encodes ampicillin resistance.
Explanation:
The plasmid would contain the ampicillin resistance gene which gets expressed in the presence of ampicillin.
people are not allow to enter the Wild reserves why
Answer:
because it can be very dangerous depending on the animal
Explanation:
hope this helps
Answer:
Because in wild life reserve, endangered animals are protected. So, people are not allowed to enter the Wild reservers
What must happen before a cell can begin mitosis? View Available Hint(s) for Part A The sister chromatids must be separated. The nuclear envelope must
Answer:
What must happen before a cell can begin mitosis? The chromosomes must be duplicated, which occurs during interphase.
Explanation:
What is added and removed from ATP/ADP
Answer:
ATP can be hydrolyzed to ADP and Pi by the addition of water, releasing energy. ADP can be "recharged" to form ATP by the addition of energy, combining with Pi in a process that releases a molecule of water.
Explanation:
Basically what the other person said
which structure provides protection by cushioning the brain?
Answer:
The arachnoid, fluid that cushions the brain.
Explanation:
Three layers of membranes known as meninges protect the brain and spinal cord. The delicate inner layer is the pia mater. The middle layer is the arachnoid, a web-like structure filled with fluid that cushions the brain. The tough outer layer is called the dura mater.
Which one of the following tissues is illustrated by the sketch?
A. xylem C. Collenchyma
B. Parenchyma D. Epidermis
Which of the following nerves is responsible for hearing and balance?
Answer:
b. Vestibulocochlear nerve
Explanation: is correct
Which structure is found in all eukaryotic cells?
flagella
large central vacuole
cilia
Golgi apparatus
Answer:
The nucleus
Explanation:
eukaryotic cells have a the nucleus, which means the cells DNA is surrounded by a membrane. Therefore, the nucleus houses the cells DNA
are sea snakes venemous?
Sea snakes are usually not aggressive unless provoked or cornered. Although they are highly venomous, only some bites result in significant symptoms of envenomation. The venom is injected by fangs.
What is photorespiration.
Which star is more massive than our Sun,but has a lower surface temperature?
(1) 40 Eridani B (3) Aldebaran
(2) Barnard's Star (4) Sirius
Answer:
The answer is not in the option, the answer is VY Canis Majoris
Which of the following statements is TRUE?
Carpal tunnel syndrome occurs when the ulnar nerve is compressed.
Carpal tunnel syndrome occurs when the facial nerve is irritated or swollen.
*Carpal tunnel syndrome occurs when the median nerve is compressed.
Carpal tunnel syndrome occurs when the 7th cranial nerve is irritated or swollen.
Answer:
c. Carpal tunnel syndrome occurs when the median nerve is compressed.
Explanation: is correct
Carpal tunnel syndrome occurs when the median nerve is compressed.
What is Carpal tunnel syndrome?When the median nerve, which travels from the forearm into the palm of the hand, is pinched or compressed at the wrist, carpal tunnel syndrome (CTS) develops. The median nerve and the tendons that bend the fingers are housed in the carpal tunnel, a small, stiff passageway made of ligament and bones at the base of the hand. The index, middle, and part of the ring fingers, as well as the palm side of the thumb, are all sensed by the median nerve (although not the little finger). The tunnel can occasionally become smaller and the median nerve can become compressed due to edema or thickening caused by inflamed tendon lining. As a result, the hand and wrist may experience numbness, weakness, or even pain (some people may feel pain in the forearm and arm). The most prevalent and well-known entrapment neuropathy, in which a peripheral nerve of the body is pushed against or crushed, is CTS.To learn more about Carpal tunnel syndrome, refer to
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When the lac repressor binds to the lac operator site, RNA polymerase is prevented from transcribing which gene(s)?
autonomic reflexes enable the ans to control what kinds of visceral functions? check all that apply.
Given what we know about the Autonomic Nervous System we can confirm that autonomic reflexes enable the ANS to control functions such as heart rate, urination, and breathing rates.
These are among the many visceral functions that the Autonomic Nervous System controls. As per the pattern that is being established, we can conclude that the Autonomic Nervous System functions at a subconscious level, controlling the visceral functions that do not require conscious thought.
Despite this, some organs can also be controlled consciously, such as the lungs and bladder. Other visceral functions such as heart rate, digestion, and even ocular responses, are not able to be controlled consciously.
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Methylation is an example of(1 point)
gene mapping
gene editing
epigenetics
DNA replication
Methylation is an example of epigenetics that is present in the third option, and this methylation helps in the expression of the gene or the repression of the gene product in the cell.
What is the importance of methylation in the cell?Methylation has many functions, such as in gene expression, where it can turn genes on or off by altering the way that DNA is packaged, such as by tightening or loosening the gene so that enzymes can access it; in DNA stability, methylation can help protect the genome from damage by stabilizing the DNA structure; and in epigenetic regulation, where it plays an important role.
Hence, methylation is an example of epigenetics that is present in the third option, and this methylation helps in the expression of the gene or the repression of the gene product in the cell.
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Answer:
C. Epigenetics
Explanation:
:)
All of the components in the list below exist in either the mitochondria, the chloroplast or they can be found in either. Match up the components to the organelle in which they exist.
Answer:
the answer is that there is no liat