Why are animals used in laboratory experiments in toxicology? Explain the dose-response curve. Why is a substance with a high LD50 considered safer than one with a low LD50?

Q: ______is the original source of new alleles. a. Mutation c. Gene flow b. Natural selection d. Geneti...

A: Mutation is the original source of new alleles.

Q: how the theory of evolution affects ours view of origin,developtment and spread of new diseases such...

A: Theory of natural selection stated that the survival of the fittest is the ultimate driving force fo...

Q: 2. Draw a Punnett square of a cross between a homozygous dominant individual and a heterozygous indi...

A: Answer 1: -  Parent individuals: - BB (homozygous dominant), Bb(heterozygous dominant) Cross: -  ...

Q: Bone mineral has the following -properties None O Has a fair amount of tensile strength Can be bent ...

A: Bone is one kind of living tissue that made a skeleton and gives the proper shape of a body. Bones a...

Q: Vho first developed the DNA sequencing approach using dideoxynucleoside triphosphates in DNA synthes...

A: DNA was major topic of discuss in early times for scientists. It's structure and constituents fascin...

Q: Compare and contrast the toxicity levels between water-soluble vitamins and fat-soluble vitamins usi...

A: Vitamin toxicity: Overdoses of vitamins cause toxic effects on the body. 

Q: Stoin namedD rathion E.coles Epidarmis S. Substilis Bacillus streptococep

A:   Introducrion :  staining is necessary in microscopy to enhance the contrast in a microscopic image...

Q: Which of the following refers to a bacterial species with variations?   Atypical   Genus   Diversif...

A: Atypical Bacteria- Atypical bacteria are bacteria that are neither Gram-positive nor Gram-negative. ...

Q: Which of the following statements indicate the function of growth hormone? It controls and regulates...

A: Hormones are chemical substances that act like chemical messanger molecules in body . They are synth...

Q: What is the importance of water, carbon and nitrogen for living organisms? Explain briefly.

A: There is wide diversity in living organisms in our biosphere. Are all living organism made up of the...

Q: How do geneticist normally tell whether an organism exhibiting a dominant phenotype is homozygous or...

A: *To know whether an organisms dominant trait is homozygous or heterozygous for a specific allele one...

Q: How does the Coriolis “Force” affect ocean productivity? How does it affect the world’s major fisher...

A: Coriolis force or Coriolis effect is the deflection of wind towards the right in the Northern hemisp...

Q: Which of the following enzymes are NOT used in recombinant DNA technology O A. Eco RI O B. Ligase O ...

A: INTRODUCTION Recombinant DNA (rDNA) is a process of joining DNA molecules from two different sources...

Q: 1.The route for renal tubular secretion is what 2. Give at least three penicillin products that are...

A: 1. What is the route for renal tubular secretion? Urine formation involves three main processes nam...

Q: Klinefelter syndrome (XXY) can most be easily diagnosed by_______ . a. pedigree analysis c. karyotyp...

A: Introduction:- Klinefelter syndrome (KS) is a hereditary disease in which a male's genetic code cont...

Q: Explain how natural selection drives microevolution

A: Natural selection is a process of adaption of an organism to its environment, Microevolution include...

Q: 8. Which of the following is the longest entity O reads contigs O scaffolds O bases

A: These options represent the various size of base sequences. 

Q: Men have slightly higher values(BMR) than women, because women have less body fat and therefore use ...

A: Introduction:- Basal metabolic rate (BMR). BMR is the number of calories your body uses to maintain ...

Q: Is this still a cheek cell? If not, what is it called?

A: Introduction :- Mucin, the main component of mucous, is secreted continuously by cheek cells. The mu...

Q: Illustrate and describe the following life cycle: (Please include references) a. Ascaris lumbricoid...

A: Introduction Ascaris lumbricoides:- Ascaris lumbricoides is an intestinal roundworm that causes rest...

Q: In order to view Treponema pallidum, the causative agent of syphilis, under the microscope, you can ...

A: Treponema pallidum is the causative agent of sexually transmitted disease (STD) called syphilis. 

Q: 16 whe Which statement is TRUE for the reciprocal regulation of phosphofructokinase-1 (PFK-1) and fr...

A: Introduction: The process by which the glucose (6C compound) is split into two molecules of pyruvic ...

Q: . The genotype r/r ; p/p gives fowl a single comb, R/− ; P/−gives a walnut comb, r/r ; P/− gives a p...

A: Comb in poultry is defined by two genes usually designated as R and P.  When only the dominant allel...

Q: Table 1. Different Staining Techniques Gram Stain Acid Fast Endospore Capsule Flagella 1. Principle ...

A:    ANSWER

Q: Why is leguminous crop rotation used in agriculture?

A: Introduction In this question we will discuss about why leguminous crop rotation is used in agricult...

Q: Provide 3 factors that influence sea level rise. Explain how each factor is influenced over differen...

A: Mostly human-induced global warming is the force behind the current global sea-level rise.

Q: If the purity of DNA sample is below 1.8 A260/A280, where did the protein contamination come from?

A: The absorbance ratio at 260 nm & 280 nm is used to determine the quality of DNA & RNA.  A ra...

Q: About the role of Ran-GAP and Ran-GEF for the unidirectional transportation of the cargo proteins mo...

A: Ran is a nuclear protein that is related to RAS and is also known as a GTP-binding nuclear protein. ...

Q: Answer the following questions based on the following karyotype shown. Write TRUE if the statement i...

A: Karyotype is the man made artificial arrangement of all chromosome present with in  cell according t...

Q: Direction: 1. Read each situation in the table below, then state if it is a density independent limi...

A:  Many factors restrict population number and expansion in nature.     Density-dependent With rising...

Q: In Figure 7-23(a), label all the leading and laggingstrands.

A: Introduction  DNA replication is very crucial for the continuation of life as every new daughter cel...

Q: What is the carbon cycle?

A: Introduction Living organisms have an impact on the carbon cycle, which represents the circulation a...

Q: if two carriers of the gene for albinism marry, each of their children has probability 1/4 of being ...

A: As 1/4 are albino then 3/4 will be normal or we can say that 3/4 won't have albmino a) (3/4)6 = 0.17...

Q: What changes in the structure of each polysaccharide affect its gelling property?

A: Gels are solid and jelly-like materials formed from colloid polysaccharides, polymers and proteins. 

Q: The egg of a fish is what type of chordate egg and why? a. isolecithal b. telolecithal with total ...

A: All fish eggs are surrounded by using an envelope, referred to as the zona pellucida (ZP), that perf...

Q: Question 5

A: Answer to Question 1: - Sequence of passage of molecule for filtration in kidney: - Blood> Capill...

Q: It is essential that RNA primers at the ends of Okazakifragments be removed and replaced by DNA beca...

A: Introduction  DNA replication is very crucial for the continuation of life as every new daughter cel...

Q: List all the cellular components (organelles and structures) involved in the proteins production. Pr...

A: The study of the formation, functioning, and behavior of cells is known as cell biology. Cells are t...

Q: Outline the flow of genetic information in cells, from DNA to RNA to polypeptide.

A: DNA is the genetic material present in the cells.  

Q: "Recombinant DNA Technology Began with Two Key Tools". What are these two Tools ?

A: Recombinant DNA technology is the technique of joining together of DNA molecules from two different ...

Q: If  I extract a cell culture with 100 cells that just entered g1.  I needs to extract the MOST possi...

A: Introduction: Cell cycle is the process by which a cell replicates i.e. makes copies of itself or fo...

Q: What is the formula for net primary production (NPP)? How does NPP relate to energy pyramids?

A: Introduction :- The difference between the energy fixed by autotrophs and their respiration is preci...

Q: A drug called garcinol, is isolated from Garciniaindica (a fruit-bearing tree commonly known as koku...

A: Garcinol is a benzophenone derivative that has been polyisoprenylated. It has phenolic hydroxyl grou...

Q: Enumerate 4 other pre-analytical factors and describe how they could ​affect the outcome of tissue p...

A: Preanalytical Phase: *The preanalytical phase means the laboratory do not have no direct control on ...

Q: Another name for the RNA polymerase recognition/binding site upstream of a gene is the O a. promoter...

A: Introduction :  In transcription process RNA polymerase binds to the DNA upstream of the gene at a s...

Q: What goes into the reaction tube for Sanger sequencing?   Template DNA, primers, DNA polymerase, an...

A: Sanger sequencing was developed by  Frederick Sanger and his colleagues in the year 1977 to determin...

Q: Men have slightly higher values(BMR) than women, because women have less body fat and therefore use ...

A: Basal metabolic rate: it is the minimum required energy to perform basic functions of the body at re...

Q: Another name for fiber is amylose O cellulose O pectins O Amylopectin

A: all plant fibers are constructed by few constituents such as cellulose, hemicelluloses, and lignin, ...

Q: 1. Which of the following are taken into consideration when classifying living things? c. Both A and...

A:

Q: True or False: Cellulose is a polysaccharide made from Beta-D- glucose. * O True O False

A: Introduction:- A polysaccharide (poly- Meaning "many") is a lengthy chain of monosaccharides linked ...

Clinical Pharmacology

Pharmacology is a discipline of medicine that studies how medications interact with the systems and processes of living organisms, focusing on drug action mechanisms as well as therapeutic and other purposes.