Which of the following is not a function performed by proteins? And explain why they are correct or incorrect
A. antibodies used in body defense
B. hormones that serve as chemical messengers
C. insulators for protection against temperature change
D. enzymes that control the rate of chemical reactions
The layer of the epidermis that contains cells undergoing division is the
The tails of the phospholipids of the plasma membrane are composed of _____ and are _______.
The tails of the phospholipids of the plasma membrane are made of fatty acid chains and are hydrophobic, helping to separate the inside of the cell from the outside environment.
Explanation:The tails of the phospholipids of the plasma membrane are composed of fatty acid chains and are hydrophobic (water-repelling). Phospholipids are a type of lipid molecule that makes up the bi-layer of the plasma membrane in all cells. Each phospholipid has a head and two tails. The head is polar and hydrophilic (water-loving) while the tails are nonpolar and hydrophobic. One significant purpose of these properties is to keep the aqueous environment inside and outside the cell separate.
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a woman has two dominant alleles. What is her phenotype?
Answer:
Her phenotype will be the physical characteristic generated by the dominant allele.
Explanation:
The phenotype is the term used to describe the physical representation of a characteristic determined by the genpotype.
To improve the understanding of this, we will use an example. As we know, the hair color of humans is determined by the genotic. Black hair has the genotype formed by the dominant homozygous alleles "AA", brown hair has the genotype formed by heterozygous alleles "Aa", while blond hair has the genotype promoted by recessive homozygous alleles "aa".
With that, we can conclude that if a woman has two dominant alleles, her phenotype is the physical characteristic represented by the dominant alleles. In the case of hair, its phenotype would be black hair.
The difference between primary and secondary circular reactions is that secondary circular reactions involve the infant responding to people and _____.
The answer is "secondary circular reactions involve the infant responding to people
and objects in
outer world."
An example is that when a mother hands the infant a duck or something he
squeezes it, sometime creating a sound which the infant feels like responding
to and that is why he/she will repeat the action again and again.
The idea was presented by a Swiss scientist Jean Piaget and is known as Piaget's stages of
sensorimotor intelligence.
The study of biogeography includes information about the location of ____.
Males account for between _____ and ______ percent of all eating disorders.
In mitosis and meiosis are daughter cells genetically identical or different from the parent cell?
Researcher, john clapham, reports that dnp could produce weight loss of up to ______ pounds a week.
Final answer:
The exact number of pounds lost per week due to DNP use is not specified by John Clapham, but DNP facilitates weight loss by disrupting the mitochondrial proton gradient, preventing ATP production and leading to increased metabolic rate and rapid weight loss. DNP use is dangerous and not recommended due to potential severe side effects.
Explanation:
Researcher John Clapham has not specified an exact number of pounds for weight loss with DNP usage in the provided information. However, it's important to understand how DNP (Dinitrophenol) facilitates weight loss. DNP acts as an uncoupler in the mitochondria of cells. It essentially disrupts the normal functioning of the mitochondrial inner membrane's proton gradient, which is a crucial component in the production of ATP (Adenosine Triphosphate). By disrupting the proton gradient, DNP prevents ATP production, causing the body to burn more energy to meet its demands. This excess energy consumption leads to rapid weight loss, as stored fat and carbohydrates are broken down at an increased rate to meet the energy deficit.
There are several ways in which DNP achieves this effect. Firstly, DNP can dissipate the proton gradient in the mitochondrial matrix, which is necessary for the production of ATP. Secondly, it can also block protons from moving through ATP synthase, which again halts ATP production. The energy that would have been used to produce ATP instead dissipates as heat, leading to the weight loss effect.
Although it might seem like a quick solution for weight loss, the use of DNP is extremely risky. This is due to the fact that its weight loss effects come alongside a host of potential side effects, including overheating, dehydration, and even fatal poisoning. Additionally, the efficacy and safety of weight loss through DNP have not been endorsed by health authorities like the FDA. Conventional wisdom, as shown by the practices of those in the National Weight Control Registry (NWCR), emphasizes that sustainable weight loss is best achieved through changes in diet and exercise.
Tetanic muscle contractions don't occur in a normal cardiac muscle because
A mass of lymphatic tissue at the back of the mouth is a(n):
The nurse is caring for an infant who has frequent respiratory infections. while assessing the infant, the nurse hears a loud and harsh holosystolic murmur at the left lower sternal border. what should the nurse infer from these findings?
The nurse should infer base from the findings is that the infant is having a ventricular septal defect in which cause the infant having to produce a loud and harsh holosystolic murmur that is found in the left lower sternal border.
How are genetic mutations passed from parent to offspring?
A. Sex cells divide to create new cells.
B. Mutated gametes (sex cells) fuse to create offspring.
C. Genetic mutations occur during DNA replication.
D. Genetic mutations only occur during meiosis, never mitosis.
Ans. (B). Mutated gametes (sex cells) fuse to create offspring.
Genetic mutations or germline mutations can be defined as permanent change in the DNA sequence of germ cells (cells, which form ovum and sperm). These mutations can pass from one generation to other, when a mutated sperm or mutated oocyte (gametes) get fertilized with other oocyte or sperm.
A germline mutation, present in a single-celled zygote will present in all cells of a muticellular organism, as single-celled zygote divides and produce all of the cells in that organism.
Thus, the correct answer is option (B).
Genetic mutations are passed from parent to offspring by mutated gametes (sex cells) which are fuse to create offspring.
Further Explanation:
Sexual reproduction is the major method of reproduction in a variety of organisms. All the plants and animals majorly undergo sexual reproduction. The main process in sexual reproduction is:
Meiosis Fertilization
Fertilization is a process of the fusion of gametes which are sperm and egg results in the diploid zygote. In meiosis ploidy level of germ cell get halved. Meiosis involves crossing over in between the non-sister chromatid of the homologous chromosome thus leads to genetic variation.
Germline or genetic mutations can be defined as the lasting change in the sequence of germ cell (sperm and ovum) DNA. These mutations can inherit from one generation to another. If a mutated gametes such as oocytes or sperm fuses with other. After fertilization, meiosis occurs and crossing over takes place which transfer the genetic information from parents to offspring. If the genetic information contains mutated gene that is also pass from parents to offspring.
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Answer Details:
Grade: High School
Subject: Biology
Chapter: Cell division
Keywords:
Reproduction, asexual reproduction, sexual reproduction, meiosis, fertilization, animal, plant, genetic variation, offspring, parents, archaea, Protista.
Is it possible that nuclear division in mushrooms represents an intermediate mechanism in the evolution of mitosis
Possibly, because karyokinesis, the division of a nucleus, is similar with that of the processes of mitosis and cytokinesis. It might be that nuclear division was an intermediate to mitosis which later developed to other cells. This means that because this replication is essential for the proliferation of cells, essentially, the mechanism that is mitosis should be vitally involved.
Some fish have bony fins. if the body of water they are in dries out, these fins can be used to help the fish "walk" to another body of water. in this context, bony fins are an example of ______.
Some fish have bony fins. if the body of water they are in dries out, these fins can be used to help the fish "walk" to another body of water. in this context, bony fins are an example of exaption.
What is exaption ?Evolution is rife with exaptation. Exaptation is the outcome of any evolutionary process that involves adopting a characteristic for a new function. This implies that all features that are moderately complicated are probably the result of a layered combination of adaptations and exaptations. Think about the barn swallow's tail feather once again as an illustration.
A change in a trait's function throughout evolution is referred to as exaptation and the related term co-option. For instance, a trait may evolve because it fulfilled a specific purpose before shifting to fulfil another. Exaptations occur frequently in both behaviour and anatomy. Feathers from birds are a prime example.
Although mammal species, including humans, use sutures to facilitate passage through the birth canal, all juvenile vertebrates have sutures in their skulls.
Thus, Some fish have bony fins. if the body of water they are in dries out, these fins can be used to help the fish "walk" to another body of water. in this context, bony fins are an example of exaption.
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¿Qué función crees que cumple el tejido cartilaginoso en la laringe y en la tráquea?
Gradual changes in the frequency of diseases over long periods are known as
Cells were first identified by Robert Hooke in the 1600s in which specimens
A.) leaf of a sweet pea
B.) Wings of a fruit fly
C.) Cells of a wine cork
D.) Single celled organism
The right answer is C.) Cells of a wine cork
Robert Hooke is an English pluridisciplinary scientist born on July 18, 1635 in Freshwater and died March 3, 1703 in London. He is considered one of the greatest experimental scientists of the seventeenth century and one of the key figures of the scientific revolution of the modern era.
His contribution in biology is very important. It is thus attributed the first description of a biological cell made from the observation of plants. Hooke describes in 1665 a fly eye and a cork cell. He was the first to use the word "cell" to designate his discovery.
The physiological ability to perceive the presence of sounds in the environment is reffered to as
What is the best way to increase the availability of ecotourism?
A kind of tourism, which incorporates visiting pristine, fragile, and comparatively undisturbed natural regions is known as ecotourism. It is regarded as the low-influenced and generally small-scale substitute to standard commercial mass tourism.
It signifies responsible travel to the natural regions, bettering the well-being of the native individuals, and conserving the environment. The best way to upsurge the accessibility of the ecotourism is to enhance the number of protected lands, parks, and conservation areas.
Question 11 the area on an enzyme where a molecule other than the substrate can attach is called an:
Which process is responsible for causing menstruation?
Final answer:
The menstrual cycle is responsible for causing menstruation. It involves the shedding of the endometrium from the uterus and is controlled by hormones from the brain and ovaries.
Explanation:
The process responsible for causing menstruation is called the menstrual cycle. It is a natural monthly cycle of processes and events in the ovaries and uterus of a sexually mature female. The menstrual cycle is necessary for the production of eggs and the preparation of the uterus for pregnancy.
During the menstrual cycle, the endometrium of the uterus is shed from the body. The cycle is controlled by hormones from the hypothalamus, pituitary gland, and ovaries. Ovulation, the release of an egg from an ovary, is part of the menstrual cycle. If pregnancy does not occur, the endometrium builds up again during the cycle and is shed during the next menstrual period.
What is the name of he group that consists only of modern humans and their direct ancestors?
"refined carbohydrates are digested __________, leading to a ________ rise in blood glucose levels."
Who uses cellular respiration?
Determining the current state process yield level would likely occur during which dmaic phase?
How does an atom become an ion
What prevents goodman brown from receiving baptism? what does the devil promise as the result of baptism?
Goodman Brown is stopped from receiving baptism due to his disillusionment about human purity after his encounter with the devil who reveals the sinful nature of humanity. The devil doesn't promise anything as a result of the baptism, but his disclosure of human sinfulness creates a bleak and pessimistic understanding of life for Goodman Brown.
Explanation:In the short story 'Young Goodman Brown' by Nathaniel Hawthorne, Goodman Brown is stopped from receiving baptism due to his encounter with the devil and his subsequent realization of the pervasive nature of evil. Despite being brought up in a religious household and community, Brown is unable to commit to the sacred baptismal vows as he has succumbed to cynicism and disillusionment about human purity after witnessing the hypocrisy and the sinful nature of those he once believed to be pious.
When Goodman Brown meets the devil, the latter does not explicitly promise anything as a result of the baptism. However, the devil does represent a promise of knowledge and understanding—an uncovering of the true, sin-ridden nature of those around Brown, thus tearing down his illusions about the inherent goodness of men. This promise, though enlightening, leaves Goodman Brown isolated and pessimistic for the rest of his life, unable to enjoy the comfort and communal bond of his earlier, naive faith.
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Goodman Brown is prevented from receiving baptism because he is tempted by the Devil to abandon his faith. The Devil promises knowledge of the sins of the townspeople as a result of baptism.
Explanation:Goodman Brown is prevented from receiving baptism in the story 'Young Goodman Brown' by Nathaniel Hawthorne because he is tempted and convinced by the Devil to abandon his faith in God. Before the ceremony, the Devil promises Goodman Brown that if he goes through with it, he will gain knowledge about the sins and corrupt nature of his fellow townspeople. The Devil tempts him by saying that his father and grandfather were involved in evil actions, which ultimately leads Goodman Brown to doubt the true intentions and righteousness of the people in his community.
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The most concentrated source of stored energy is a molecule of
Fats are the most concentrated source of stored energy in biological systems due to their dense energy content. While ATP has immediate energy available, fats are more efficient for long-term energy storage compared to sugars or other macromolecules.
The most concentrated source of stored energy in biological systems is a molecule of fats. This is because fats contain carbon atoms in a highly reduced state, allowing for a higher release of energy upon oxidation compared to other macromolecules like sugars, proteins, or nucleic acids.
For instance, the oxidation of fats releases about 9 kcal/mol of energy, whereas proteins or carbohydrates provide approximately 4.5 kcal/mol.
When considering potential energy in molecules like sucrose, ATP, glucose, and ADP, ATP (adenosine triphosphate) typically has the most immediate energy available for biological processes. However, for long-term energy storage, fats are more efficient due to their ability to pack together tightly without water, enabling the storage of a greater amount of energy in a reduced space.
Carbohydrates such as sugars and glycogen provide readily available energy sources, but due to their association with water, they are not as energy-dense as fats and are commonly used for short-term energy needs.
Cara and chuck were looking at pond water through a microscope they saw small square crystals in their slide cara wondered what is was chuck said it could not be any living thing because it was not? A. Round. B. Moving. C. Small enough. D. Made of cells.
The answer is D it is not made of cells
The right option is; D. Made of cells.
.....chuck said it could not be any living thing because it was not made of cells.
Cell is the basic structural and functional unit of all living organisms. All living organisms are made up of many cells that functions together, and they are either unicellular or multicellular organisms. Cells contain several membrane bound organelles that perform different important functions within the cell. Distinct features that allow a cell to carry out its functions include; a cell membrane that keep the chemical reactions of life together, at least one chromosome that contains genetic material, and the cytoplasm (the content of the cell).