1. Could viruses have been the first form of life on earth? Why or why not?

Q: A P cross of AAbb x aaBB is performed. An F1 offspring is crossed with an individual that is aabb.…

A: Alleles are the alternative forms of a gene that are located on the same locus of homologous…

Q: What is the relationship between nursing and molecular biology?

A: Nurses who are knowledgeable in the rapidly expanding science of molecular biology can contribute in…

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A: During P450-catalysed monooxygenation.......?

Q: Explain the reason not for trusting the results after the change of temperature of the incubator…

A: Biochemical test strip Biochemical test strips contain dehydrated bacterial media which are further…

Q: What are the risks in planting (dead seed, unhealthy)

A: Putting the seeds in a jar of water is one approach to determine whether the seed is viable or…

Q: What treatment modalities are available to patients with end-stage liver failure?

A: Introduction: End-stage liver failure (ESLF) is a potentially fatal illness that affects people…

Q: What is the correct pairing of the Ramachandran plots with the protein structures they quantify? A B…

A: Ramachandran Plot - The Ramachandran plot is a plot of the torsional angles - phi (φ)and psi (ψ), of…

Q: Describe the major classes of filaments which make up the cytoskeleton and the differences in their…

A: Introduction  Some cytoskeletal filaments are dynamic, as evidenced by two phenomena: dynamic…

Q: How many spermatozoa may be formed from 8 primary spermatocytes? O 64 4 8 32 16

A: Introduction: Spermatogenesis is the process by which spermatozoa are created and developed within…

Q: Write the genotype and phenotype that would be expected from this cross.  Write the genotype and…

A:

Q: you have a recessive phenotype for a given trait, but neither of your parents has that phenotype,…

A: A dominant allele produces a dominant phenotype in individuals who have one copy of the allele,…

Q: Describe the possibility of generation of novel life forms from a flask with boiled yeast broth,…

A: The theory of spontaneous regeneration, which proposed that life entities develop from inanimate…

Q: Acetylcholine that binds to a muscarinic acetylcholine receptor will stimulate cardiac muscles.

A: Acetylcholine binds to muscarinic AChRs, which undergo a conformational shift that leads to the…

Q: Recently, scientists have identified a mutation that is found at high frequency in Finnish…

A: The physical and functional unit of heredity is a gene. They transmit knowledge from one generation…

Q: True and false with explaination: Protozoans are complex organisms with a set of specialized cells…

A: Zooplanktons are protists that lack walls, are not photosynthetic, and are holozoic. Protozoans…

Q: Explain situations in which pulsed-field gel electrophoresis is most useful.

A: Numerous bacteria cannot be cultivated using the same genotypic techniques, according to genetic…

Q: Match the term with its complement. T-cell receptor 8-chain gene CD3 complex CD4 beta-2…

A: Major Histocompatibility Complex (MHC) MHC is the group of genes encoding for specufuc proteins that…

Q: Mendel's work was ignored for about 35 years, until it was essentially replicated. Meanwhile, cell…

A: The answer is false.

Q: The cross AaBb x AABB results in which of the following phenotypic ratios? 9:3:3:1 1:1:1:1 1:1 1:0

A: Dihybrid cross When a single cross of two different individuals for two traits is done…

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A: Blood pressure is the pressure exerted on the arterial walls by blood flowing into it. The blood…

Q: ESTION 16 junction is connecting the cell's cytoskeleton to the basement membrane. This is a…

A: Cell junctions, also known as intercellular bridges, are a class of cellular components that contain…

Q: structure labeled A in a cat, and what it posteriorly connects to.

A: Cats belong to the Felidae family and can be domestic or wild. Felis catus is the domestic species…

Q: The cross AaBb x AAbb results in which of the following phenotypic ratios? 1:2:1 1:1:1:1 9:3:3:1…

A: A dihybrid cross is made up of two people who have two features that are regulated by two different…

Q: Find the true or false. of the following statement: "Each member of the human haemoglobin gene…

A: Gene: Chromosomes include hereditary structural units called genes that are in charge of…

Q: Explain the reason for fact that the distinct serotypes are not different species instead when…

A: Serology refers to the area of immunological microbiology that studies serum and microorganisms. The…

Q: tate two postulates of Oparin and Haldane with reference to origin of life .

A: Elements that are not living gave rise to life. To create a straightforward organic complex, these…

Q: How could you test whether the extra FCs are from FCs dividing, or from a change in the fate of…

A: The Drosophila tracheal system produces two morphologically distinct forms of seamless tubes from…

Q: 18) In what way is RNA polymerase different than DNA polymerase?     RNA polymerase takes part in…

A: Introduction:- Transcription, which produces RNA from DNA, Protein, which gives an organism its…

Q: A cross is performed between individuals with the following genotypes: Aabb and aaBb. Use a Punnett…

A: Punnett square is a method of genetic analysis. It helps in genetic analyses by performing cross…

Q: * 191 Biology B CR-Edgenuity X pre.learn.edgenuity.com/player/ The Nervous System Practice Active 3…

A: Atfirst nerve impulse arrives at presynaptic terminal of one neuron. Then neurotransmitter…

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A: Vertebrates are animals that have a backbone inside of them from birth. which lack compound eyes…

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A: the electron transport chain is a collection of four protein complexes that couple redox reactions…

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A: Structural analysis of bacterial release factor 1 (RF-1) and release factor-2 (RF-2) has revealed…

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Q: Which of the following are not driving forces for protein folding? Salt Bridges Conformational…

A: Protein folding is the mechanical way of converting a protein chain to its natural three-dimensional…

Q: What is the pointed structure labeled A in a cat's urogenital system?

A: The cat's urinogenital system consists of the kidneys, ureters, bladder, and urethra. The cat's…

Q: One technique is the denial of service attack, using multiple attacking systems in multiple…

A: The correct answer is (a) amplification.

Q: Describe the reason why bacterial population in a culture tends to grow slowly under unfavorable…

A:

Q: Does adenylate cyclase become more active when the inhibitory (Gia) protein is mutated and increases…

A: The GPCR pathway involves activation of cell surface receptor that is a 7 pass transmembrane…

Q: The five classes (isotypes) of immunoglobulins comprise Select one: a. IgA, IgD, IgE, IgG, IgM b.…

A: The immune system uses an antibody, often referred to as an immunoglobulin, to identify and destroy…

Q: Which of the following are important chemical considerations defining the structure and function of…

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A: The answer is: Some traits skip a generation and then return

Q: 1 2- 3 4 5- 6 Label the indicated structures in each type of cell in the illustrations below.…

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A: The Ramachandran plot shows the statistical distribution of the combinations of the backbone…

Q: Cell Membrane Cell Wall O Nucleus Cytoplasm 2. 6. 8. 5. 4. 7. 1. 3. Mitochondria Chloroplast ooo…

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A: following are the advantages that seedless plants in demand , industry, economy

Q: Which of the following statements about polynucleotide formation is correct? As a polymer, DNA is…

A: Polynucleotides are made when a polymerase enzyme joins nucleotifes together.

Q: In the development of an antiviral drug what would be two areas that would be deadly to the virus,…

A: Virus infection within host cell is mostly carried out by a cascade of events namely: Attachment:…

Q: Describe the study of model organisms helps to study cellular processes and how diseases like cancer…

A: A species that has undergone extensive research is known as a model organism. This is typically…

Q: Investigue y describa cómo las células procariotas realizan fotosíntesis sin poseer cloroplastos.…

A: Prokaryotes are found everywhere. They grow on and inside nearly every single other living creature,…

Virus

Viruses are infectious microscopic agents that can only reproduce in live cells of animals, plants, or microbes and are smaller than bacteria. Vertebrates, invertebrates, plants, protists, and fungi are among their many hosts. Viruses are unable to multiply on their own due to the lack of necessary cellular machinery, but they can guide the cell machinery of a host to make additional viruses by infection. The virus enters and attaches to a particular host cell, injects its genetic material, and reproduces by using the host’s genetic material. Viruses cause infection by taking entry into the host cell and using the host cell’s enzymes and raw materials to multiply.