Describe Covid-19, it’s mechanism of entry, and it’s deleterious effects. Be specific about receptor type used for viral entry.

Q: What are the functions of Cell signaling proteins?

A: Introduction: Cells use chemical signals to communicate with one another and with other cells and…

Q: how do you overcome problems when being a research scientist

A: The main objective of a research scientists is to solve problems of daily life through invention of…

Q: Diagram 3: Lower Respiratory System

A: The organ system of human body through which exchange of gases occurs between the body and the…

Q: Which of the following is an example of a proto-oncogene? 1) cell cycle inhibitor 2) tumor…

A: Oncogene The gene that are cancerous and divide cell abnormally.

Q: A benefit of second messengers is that O they decrease the effect of negative hormones. O they…

A: The exposure to extracellular signalling molecules to the cell leads to release of intracellular…

Q: When does development of neuronal myelination occur?

A: Developmental biology is the branch of biology which studies how several interrelated mechanisms…

Q: Why do fish need to ventilate 30 times more than mammals?

A: Both fishes and mammals need oxygen to survive.  Water can hold a lower amount of dissolved oxygen…

Q: "Presence of lactobacillus species, alpha-streptococci, dna diphtheroids in cultured urine specimen…

A: The urinary system is one of the vital excretory systems in the body. It helps in removing wastes…

Q: How many ATP molecules are produced by metabolism of an acetyl COA molecule? A) 1 B) 1.5 C) 2.5 D)…

A: Introduction  Acetyl-CoA is a molecule that takes part in a variety of metabolic processes in the…

Q: If you count 70 colonies from a urine culture obtained using 0.001ml calibrated loop, how many…

A: CFU or colony forming unit is an unit of measurement that is used to estimate the viable microbial…

Q: Explain how an imbalance in any given physiological variable may produce a change in one or more…

A: Variable in a simple term refers to the values that can change or vary and at the same time this…

Q: Meiosis Allows fish to control their buoyancy OIs a cell division that produces a diploid cell

A: The type of cell division known as meiosis produces four haploid daughter cells from a single…

Q: What are the major differences between type 1 and type 2 diabetes in relation to insulin?

A: The blood glucose level of the body is regulated by insulin and glucagon.

Q: Which combination of oncogenes and tumor suppressors is MOST likely to develop a tumor? 1) decreased…

A: Tumor is the characteristic feature of the abnormal cell division. The cell division rate is faster…

Q: The peptide hormone oxytocin induces labor by stimulating the concentration of uterine smooth…

A:

Q: Why it is necessary for an Rh− woman who has had an abortion, miscarriage, or an ectopic pregnancy…

A: Blood types in people are divided into four groups: A, B, AB, and O. Based on whether a surface…

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A: Gel electrophoresis is a technique by which macromolecules are separated and analysed. After the…

Q: What is the probability that their offspring has freckles and separated eyebrows

A: Introduction The traits that can be expressed even when a single copy of an allele is present are…

Q: o How do SNPs arise? describe one example of an SNP cause of a genetic disease  describe one…

A: Geneticists use SNPs as markers to find genes in DNA sequences. Suppose a gene alteration raises the…

Q: A woman with blood type A, who is heterozygous for both blood type and Rhesus factor, had a child…

A: The Human Blood group is a classic example of multiple allelism and co-dominance. ABO blood type in…

Q: Which are the Trace Elements: Less than 0.01% of Total Atoms in the Body?

A: On Earth, 92 elements are found in their native state. Only 11 of these elements are present in…

Q: A person with type A blood can safely donate RBCs to someone of type someone of type O B; A AB; O O…

A: Blood group donation and acceptance is determined by the type of antigen and the antibody that is…

Q: Which of the characteristics identified using SIM media, which would be most useful in…

A: SIM agar media is referred to as a sulfur or indole or motility test combined in one agar deep if…

Q: Each answer can be used more than once, or not at all. - Simple Diffusion - Facilitated diffusion…

A: Introduction Diffusion is a process which involves the movement of molecules from a high…

Q: How do myasthenic crisis and cholinergic crisis differ in terms of cause and treatment?

A: The immune system provides protection against pathogens. Likewise, other organ systems of the body…

Q: Why it is necessary for an Rh− woman who has had an abortion, miscarriage, or an ectopic pregnancy…

A: Introduction :  Erythroblastosis foetalis also called the haemolytic disease of the newborn. It is a…

Q: What are the functions of Defense proteins?

A: Proteins are the polymers of amino acids joined by peptide bonds.

Q: After giving a response to low sugar levels in the blood, the pancreas releases the hormone…

A: A hormone called glucagon is important in regulating blood sugar (glucose) levels. It is created by…

Q: Which of the following is released by endothelial cells and targets smooth muscles surrounding the…

A: Introduction  All blood vessels are lined by a single cell layer called the endothelium, which…

Q: are stacked upon each other to make up strands of DNA.

A: DNA is a self-replicating material that is present in nearly all living organisms as the main…

Q: What is the most important environmental cue for the entrainment ofcircadian rhythms?

A: The body's internal clock is made up of 24-hour cycles called circadian rhythms which work in the…

Q: What are pheochromocytomas?

A: Pheochromocytomas Pheos means Dark Chroma means Color Cyt means cell Omas means cancer, It's a…

Q: "If you find purple colonies with metallic green sheen growing on your EMB plate following an…

A: Introduction : Gram-negative bacteria can be identified using the selective stain Eosin-Methylene…

Q: List two defects of neural tube closure.

A: Introduction: Birth malformations affecting the brain, spine, or spinal cord are called neural tube…

Q: . What is the difference between organic and inorganic molecules? B. Name four major groups of…

A:

Q: Describe the characteristics of the three types of levers in the body

A: Introduction  Muscles and bones make up the lever systems in the human body, and the main goal or…

Q: Why do children with thalassemia major develop cardiovascular complications?

A: Blood is a liquid connective tissue with formed elements.

Q: A researcher crosses two tall plants, however, one quarter (1/4) of the offspring from this crossing…

A: Mendel was known as the father of genetics.  Mendel's inheritance gave certain laws of how traits…

Q: Historians report that 2500 years ago the Chinese learned to treat superficial infections such as…

A: Answer--- Antibiotics play significant role in the treatment of skin infections caused by fungi.

Q: Throughout the reflection, make sure you have a copy of the Student Guide and your data tables. Fill…

A: Introduction  A watershed is an area where all the water from many sources drains together. A…

Q: After giving a response to low sugar levels in the blood, the pancreas releases the hormone…

A: Introduction Homeostasis alludes to the total capacity of the body to keep up with the stability of…

Q: Question 28 "If you find purple colonies with metallic green sheen growing on your EMB plate…

A: Eosin Methylene Blue (EMB) agar is a both selective and differential culture medium. It is selective…

Q: Describe a drug therapy that has been used for patients infected with SARS CoV2.  What does it…

A: There are few important points : This disease is caused by virus called as covid-19 and has been…

Q: ring or group specialized cells around the sporangia elaters sori annulus indusium

A: Introduction The sporangium is a structure found in in the fungi, bryophytes and pteridophyte. It…

Q: Which of the following is the opposite of hypertrophy? 1) anaplasia 2) apoptosis 3) atrophy 4)…

A: Hypertrophy refers to the condition in which increase in volume or tissue particularly muscle due to…

Q: What are electrolytes?

A: The research of biochemical functions at the molecular and cellular levels is known as biochemistry.…

Q: estion 14 From which chamber of the heart does blood leave to the lungs

A: Introduction Your heart beats to provide blood to your body that is full of nutrients and oxygen.…

Q: What makes a cell responsive to a particular hormone? O The location of the gland that secretes the…

A: Introduction Hormones are chemical messengers that are directly released into the blood, where they…

Q: If the following terms were used to describe a tumor, which one would indicate the worst prognosis…

A:

Q: Explain step by step in your own words what are the events that follow fertilization

A: Introduction An organism reproduces an offspring that is biologically identical to the organism…

Viral Infections

Viruses are abundantly found, minute entities that have genetic material enclosed within a protein coat. The proteinaceous material enclosing the genetic material of the virus is called a capsid. The genetic material could be either DNA (deoxyribonucleic acid) or RNA (ribonucleic acid). A virus is too minute to be looked at with naked eyes and therefore visualized with the help of a microscope. They are acellular entities that require a host for processes, such as replication, transcription, translation and multiplication. Plants, animals, and bacteria act as host wherein the virus reproduce. Viruses cannot multiply outside the host's body and thus are considered nonliving outside the host body.