Answer:chromosomes are separated by a structure called the mitotic spindle and then pulled by the spindle to opposite poles of the cell
Explanation:
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Answer:
1. The difference between the normal hemoglobin protein DNA sequence and the sickle cell hemoglobin DNA sequence is a base to base shift, in this case adenine (GAG) to thymine (GTG).
2. The difference affects the amino acid sequence of the protein by replacing glutamic acid (Glu) with valine (Val).
Explanation:
In sickle cell anemia, a change in the DNA nucleotide sequence is observed, where adenine is substituted by thymine, whose expression is the change in the amino acid sequence of globine β, incorporating valine instead of glutamic acid. This represents a molecular mutation - point mutation - by subtitution, which corresponds to missense mutation.
Normal hemoglobin protein in a RBC
DNA CTG ACT CCT GAG GAG AAG TCT
Amino acids Leu Thr Pro Glu Glu Lys Ser
Sickle cell hemoglobin protein in a RBC
DNA CTG ACT CCT GTG GAG AAG TCT
Amino acids Leu Thr Pro Val Glu Lys Ser
When GAG is transcribed to mRNA, the CUC codon is obtained, which codes for glutamic acid. Thymine substitution causes the DNA sequence to change to GTG, which is transcribed as CAC, the codon that encodes the amino acid valine. The change from glutamic acid to valine in β-globin causes an altered hemoglobin, giving the abnormal erythrocytes observed in sickle cell disease.
Identify the letter of the choice that best completes the statement or answers the question. When determining the number of significant digits in a measurement,
Answer:
B
Explanation:
Identify the letter of the choice that best completes the statement or answers the question. When determining the number of significant digits in a measurement. When determining the number of significant digits in a measurement,
a. all zeros are significant.
b. all nonzero digits are significant.
c. all zeros between two nonzero digits are not significant.
d. all nonzero digits are not significant.
According to the rule of significant figures;
all nonzero digits in a number are significant. For example, 161.45 has 5 significant digits. all zeros after nonzero digits without decimal points are not significant. For example, 12300 has 3 significant digits.all zeros located between nonzero digits are significant. For example, 2002 has 4 significant digits.leading zeros in a digit are not significant. For example, 00123 and 0.0123 have 3 significant digits each.Hence, the correct option is B.
Make a list of the energy carriers involved in the Krebs cycle. Include their names before and after they accept the electrons.
Thank you!
Answer:
12
Explanation:
Make a food web for the rainforest
(No pictures needs to be written)
Answer:
Producers are bamboo trees, coconut trees, banana tree, shrubs , bromeliads e t.c.
The primary consumers are monkey, grasshopper, bats, macaws, butterflies, sloths.
Secondary consumers are iguanas, vampire bats, frogs.
Tertiary consumers are Jaguar and python.
Decomposers are insects, microorganisms.
Explanation:
Food webs refers to association that comprises of interconnections of several food chains or what organisms feed on or live on in an ecological community. Food web comprises of producers, primary consumer, secondary consumer , tertiary consumer and decomposers.
Which treatment would be considered gene therapy?
removing an organ that is not working properly
giving medicine to match the effects of a gene
working correctly
introducing a new gene to the body
giving medicine to kill infections
Answer:
introducing a new gene to the body
Explanation:
This because gene therapy is the process where gene from genetic material or DNA is transfered or introduce into the body of a patient to treat diseases or certain infections. This is done to cure ailments. This is a process that modify the gene that is present in the patient body which is the source or cause of the disease and then make it to work normally.
How might an error during transcription affect the protein that is produced?
Answer:
the protein might be unable to function
Which is not true in the following statements.
Binary fission is a form of asexual reproduction.
Budding is a form of reproduction.
Propagation is a form of asexual reproduction
Meiosis is a form of asexual reproduction.
A half-life is the time required for one half of the atoms of a radioactive substance to decay. Do these special type of atoms continue to decay until they become stable atoms and they do not give off energy anymore?
Answer:
Half-life, in radioactivity, the interval of time required for one-half of the atomic nuclei of a radioactive sample to decay (change spontaneously into other nuclear species by emitting particles and energy), or, equivalently, the time interval required for the number of disintegrations per second of a radioactive
Explanation:
What is the significance of the sequence of nitrogen bases in a DNA molecule?
Answer:
The sequence of the nitrogen bases detremine the order of amino acids in the proteins synthesized. AKA determine the amino acids in the protein
Explanation:
A DNA is used as a template to create mRNA in a process known as transcription. Transcription occurs in the nucleus and it is catalyzed by an enzyme RNA polymerase.
mRNA moves to the ribosome, and is translated.The nucleotide sequence on the mRNA are arranged in triplets known as codons. The codons on the mRNA are read by the ribosome and used to make a protein.
Thus, the order of nitrogenous bases determines the order of amino acid sequence of the protein synthesized.
The order in which amino acids are added to newly synthesized proteins is determined by the sequence in which nitrogen bases are added.
What are nitrogenous bases?In the process known as transcription, a DNA molecule serves as a template for the production of mRNA. The nucleus is the location where transcription takes place, and the RNA polymerase enzyme is the catalyst for this process.
The translation process begins when mRNA travels to the ribosome. The nucleotide sequence on the messenger RNA is organized into triplets that are referred to as codons. The ribosome reads the codons that are written on the mRNA and uses that information to make a protein.
Therefore, the sequence of amino acids in the newly synthesized protein is determined by the order in which nitrogenous bases are added.
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What causes the stars to seem to disappear in the city skyline at night?
Оа
Small buildings
b
The sun
The moon
ос
Od
Light pollution
Stars seem to disappear from the city skyline at night due to light pollution caused by artificial lights.
What is light pollution?It is the excessive or less use of artificial light that disrupts the natural patterns of wildlife, disrupts human sleep, and conceals the stars in the sky.
Why do stars disappear from the city skyline?It is because in the city skyline there is excessive use of artificial lights and there is not a portion left which is not encroached by artificial lights.
Hence, option d) light pollution is the correct answer.
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What is the difference between droplet and airborne spread of viruses like the measles?
Answer:
droplet consists of exposure to larger, smaller and particles when a person is close to a infected person. airborne consist of smaller droplets even for greater distance
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Answer:
D!
Explanation:
9. What happens when most chemical changes take place
a. Only the form of the matter changes.
b. The mass of the matter increases.
c. There is no change in heat.
d. Heat is liberated or absorbed.
In the late 1800s, a biologist studying animal embryos coined the phrase "ontogeny recapitulates phylogeny," meaning that the physical development of an animal embryo (ontogeny) seemed to retrace the changing form of the species during its evolutionary history (phylogeny).
Why would embryonic development retrace evolutionary steps?
Answer:
Embryo provides information about their ancestors.
Explanation:
Embryonic development retrace evolutionary steps because embryo provides evidence for evolution as embryo formation in widely-divergent groups of organisms are conserved. This embryo provides information that leads to their ancestors from which they evolve so we can say that embryonic development provides evidence for evolution of an organism.
In order to extract DNA from strawberry cells, what will need to happen at the cellular level?
Answer:
Tiene que romperse la membrana plasmática para poder acceder al núcleo de la célula y posteriormente romperse también la membrana nuclear para dejar libre al ADN
Explanation:
what is an outcome of lack of oxygen?
Answer:
Blood carries oxygen to the cells throughout your body to keep them healthy. Explanation:
Hypoxemia can cause mild problems such as headaches and shortness of breath. In severe cases, it can interfere with heart and brain function. Hypoxemia that causes low oxygen levels in your body's tissues is called hypoxia.
The outcome of lack of oxygen To maintain your body's cells healthy, blood provides oxygen to every cell.
What is cell ?The smallest unit that can sustain life on its own and makes up all living things, including the body's tissues. The cell membrane, the nucleus, and the cytoplasm are the three primary components of a cell. The substances that enter and leave the cell are governed by the cell membrane, which encloses the cell.
There are two different types of cells: prokaryotic cells, which lack a nucleus but still have a nucleoid area, and eukaryotic cells, which have a nucleus. Eukaryotes can either be single-celled or multicellular, in contrast to prokaryotes, which are single-celled organisms.
From bacteria to humans, cells give all living things their structure and functionality. They are regarded as the tiniest form of life by scientists.
Thus, To maintain your body's cells healthy, blood provides oxygen to every cell.
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Which of the following is a way that lakes differ from ponds?
A) temperature variation
B) size
C) effect on weather conditions
D) all of the above
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1. Show the possible outcomes if a women who is a carrier for baldness has children with a normal man.
Can they have a son with baldness?
Answer:
Yes they can.
Explanation:
I defined the genotypes and possible outcomes in the image attached
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Answer:
A) It helps to separate the chromosomes
Explanation:
Where does carbon dioxide end up?
Answer:
Only about 50 percent of the CO2 from human emissions remains in the atmosphere. The remainder is approximately equally split between uptake into the land biosphere and into the ocean.
Explanation:
Which of the following is the lysosome?
Answer:
D
Explanation:
1. the process some organisms are able to use by which they convert light energy to chemical energy 2. the main method photosynthesizing organisms use for carbon dioxide fixation Photosynthesis 3. a set of chemical reactions that break down pyruvate, producing electron carriers for an electron transport chain that powers ATP production 4. the process cells use to produce energy from carbohydrates 5. a substance that absorbs some wavelengths of light and reflects others, giving something its color 6. the green substance that absorbs light and provides energy for photosynthesis 7. disc-shaped sacs in chloroplasts in which photosynthesis takes place 8. the series of molecules in the inner membranes of chloroplasts and mitochondria down which excited electrons pass, releasing energy for ATP production 9. process by which NAD is recycled under anaerobic conditions in order to continue the break down of carbohydrates to supply energy for producing ATP 10. adenosine triphosphate, a substance that stores and releases energy for most cell processes 11. describes a process that requires oxygen
Considering the given descriptions of metabolic reactions, the correct terms described are:
1. photosynthesis.
2. photosynthesis
3. citric acid cycle.
4. respiration.
5. pigments.
6. chlorophyll.
7. thylakoids.
8. electron transport chain.
9. fermentation.
10. Adenosine triphosphate
11. Aerobic reactions
What is photosynthesis?Photosynthesis is one of the many chemical reactions that occur in living organisms.
Photosynthesis is the process by which living organisms known as plants use the energy of sunlight to convert carbon dioxide and water into chemical energy stored in foods.
These chemical reactions are known as metabolic reactions and are essential for the growth and development of the living organism.
Considering the given descriptions of metabolic reactions:
Photosynthesis is the process some organisms are able to use by which they convert light energy to chemical energy. It is the main method by which photosynthesizing organisms use for carbon dioxide fixation to produce food nutrients.
The green pigment that absorbs light and provides energy for photosynthesis is chlorophyll.
Pigments are substances that absorb some wavelengths of light and reflect others, giving something its color.
Chlorophyll is found within chloroplasts. Thylakoids are disc-shaped sacs in chloroplasts where photosynthesis takes place.
Through the process of respiration, cells produce energy from carbohydrates. In living organisms such as man, the citric acid cycle is a set of chemical reactions that break down pyruvate, producing electron carriers for an electron transport chain that powers ATP production.
Adenosine triphosphate, ATP, is a substance that stores and releases energy for most cell processes.
The electron transport chain refers to a series of molecules in the inner membranes of chloroplasts and mitochondria down which excited electrons pass, releasing energy for ATP production.
ATP production can occur under aerobic or anaerobic conditions.
Aerobic reactions are processes that require oxygen while anaerobic reactions do not require oxygen.
The process by which NAD is recycled under anaerobic conditions in order to continue the breakdown of carbohydrates to supply energy for producing ATP is called fermentation.
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3. Two parents bring their 4-year-old son, James, to the doctor because he is having
difficulty walking. He is diagnosed with a genetic disorder called Duchenne muscular
dystrophy, which affects males much more often than females. When genetic testing of
the family is done it is found that James' grandmother, mother, and one of his sisters are
all carriers for the disease. What is the most likely inheritance pattern for this disease?
i
Answer:
from his mother
Explanation:
because they have one copy of X chromosome from their mother and if X chromosome have DMD gene mutation so he will have DMD
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Answer:
its "A" water flowing over a tall cliff
Explanation:
Madison's group lab is given a dish that contains sand, shells and water. How should they classify the substance they have been given?
A: The solution is a homogenous mixture because it has the same uniform appearance and composition throughout
B: The solution is a heterozygous mixture because it does not have the same uniform appearance or composition.
C: The substance is a compound because it contains several elements.
D: The substance is a pure substance because it's made up of various compounds.
Dialectical behavior therapy (DBT) is used to treat all of the following EXCEPT
O schizophrenia
O borderline personality disorder
O drug addiction
O chronic suicidal behavior
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Which process does this picture show?*
Transcription
Translation
Replication
Transformation
How do you think the rock layers and fossils found in Red Rock Canyon can provide evidence for Earth's geologic history? What types of information can scientists learn from fossils?
Answer:
Fossils found in Canyon are crinoids, brachiopods, and sponges.
Explanation:
The rock layers and fossils found in Red Rock Canyon can provide evidence for Earth's geologic history because the canyon has marine fossils such as crinoids, brachiopods, and sponges and also contains terrestrial fossils such as impressions of leaf, dragonfly wing, scorpions, centipedes, and reptiles. So we can say that Red Rock Canyon provides a lot of evidences about geological history. The scientists learn a lot of information from fossils such determine the age of the rock, relation of different organisms with one another and ancient environments.
Explain an example why selective breeding is an example of biotechnology