Answer:
The options
A) Small weeds began to grow and develop.
B) There was no distinct change in the corn fields.
C) All of the corn died due to a rampant corn disease.
D) The corn mutated to form a new species of vegetable
The CORRECT ANSWER IS A)
A) Small weeds began to grow and develop.
Explanation:
There is a very high tendency for Farmer Scott to observe the small weeds that had started to sprung up and continued to grow while he was away for some time in his corn field. The field was kept during those times without any use of the necessary protection methods such as pesticides or insecticides. The weeds still grew at the farm without weed clearing for two whole weeks, which must have resulted in the observed raise in growth. The weeds will compete with the corn plants for soil nutrients as the weeds will absorb a greater portion of soil nutrients than the corn plants. It results in shortage of nutrients for the corn.
Therefore, the right option is A)
Small weeds began to grow and develop.
Amino acid supplements are advertised to enhance performance in various groups of athletes. Based on the available research data, which of the following statements is FALSE concerning their effectiveness in this regard?a) arginine and ornithine are used to stimulate the release of human growth hormone, but research is generally not supportive of an ergogenic effectb) L-tryptophan has been shown to enhance performance in one study, but more recent data with better study designs have shown that L-tryptophan is not an effective ergogenicc) some well controlled research with aspartates has shown some possible beneficial effects, but more research is needed for confirmationd) BCAA supplementation in theorized to be beneficial in prolonged endurance events, but more research is needed for confirmation, especially with chronic supplementatione) Although not an essential amino acid, research conducted at Old Dominion University has shown inosine to be an effective ergogenic for aerobic endurance events
Explanation:
A biochemist is analyzing an aqueous solution of a pure unidentified macromolecule that she isolated from the cytosolic fraction of plant cells. She determined that the macromolecule is probably DNA from chloroplasts and mitochondria by adding an enzyme that catalyzed the destruction of the macromolecule. The enzyme most likely broke which type of bonds? a.glycosidic
b.peptide
c.phosphodiestes
d.None of the above
Answer: Option C) phosphodiesters
Explanation:
Since DNA, also known as deoxyribonucleic acid, is a macromolecule consisting of several repeating deoxynucleotides units of nitrogenous bases (Adenine, thymine, cytosine and guanine), where each is linked at the 3' position of its pentose sugar to the phosphate group attached to the 5' position of the pentose sugar on the adjacent nucleotide by a phosphodiester bond; the enzyme most likely broke the 3',5'-phosphodiester bonds, therefore leading to the unwinding of its double strands.
Compare the bones of the upper limbs with those of lower limbs. In what ways are the shapes and arrangements of the bones similar? How are they different?
Explanation:
A nursing instructor teaches nursing students about the steps to be taken while obtaining a guaiac fecal occult blood test (gFOBT). Which statement if made by a student indicates the need for further learning?
Explanation:
Proteins that are consumed as part of the diet are digested into single amino acids, absorbed in the small intestine, and transported via the portal vein to the liver. Fill in the blank about protein digestion. Proteins are denatured by hydrochloric acid in the 1. stomach
2. pancreas
3. liver
4. mouth small intestine
Answer:
Stomach
Explanation:
The digestion of protein starts in the stomach, where HCl and pepsin break proteins into smaller polypeptides, which then travel to the small intestine
Assuming the stomata are open to the same degree, the rate of transpiration should _____ on a rainy day compared with a sunny day, because the relative size of the H2O concentration gradient from the inside to the outside of the leaf would _____. A. increase: increase
B. decline: decrease
C. increase: decrease
D. decline: increase
Answer:
B. DEcline and Decrease
Explanation:
Transpiration means loss of water, which is higher on a sunny day than on a rainy day
Immediately after a client's thoracentesis on the right side of the chest cavity, the LPN/LVN notices a progressive swelling on the right side of the client's chest and neck. The LPN/LVN identifies which of the following conditions as the MOST likely cause of this swelling?1. Pneumothorax post-thoracentesis.2. Subcutaneous emphysema.3. Lipoma.4. Hematoma formation.
Answer:
2. Subcutaneous emphysema
Explanation:
Subcutaneous emphysema is a Medical condition where a bulging or swelling occurs beneath the skin due to passage of air or gas in the subcutaneous layer of the skin. Thoracentesis which is mostly done to remove fluid could cause air passage into the subcutaineous tissue resulting in swelling which progresses as more air enters the tissue
The Hershey and Chase experiments involved the preparation of two different types of radioactively labeled phage. Which of the following best explains why two preparations were required? A. Establishing the identity of the genetic material required observation of two phage generations.
B. The bacteriophage used in the experiments was a T2 phage.
C. It was necessary that each of the two phage components, DNA and protein, be identifiable upon recovery at the end of the experiment.
D. Each scientist had his own method for labeling phage, so each conducted the same experiment using a different isotope.
Answer:
C. It was necessary that each of the two phage components, DNA and protein, be identifiable upon recovery at the end of the experiment.Explanation:
Alfred Hershey and Martha Chase performed an experiment to identify the chemical nature of the genetic material.
After completion of the experiment, they found that DNA is a genetic material and not protein.
In this experiment, bacteriophage was used that is made up of DNA and protein so it was necessary to identify protein as well as DNA so both were labeled separately.
True membranes must fit these structural and functional qualifacations: consist of a superficial layer of epithelial tissue and a layer of connective tissue on which it rests; and anchor organs in place, serve as barriers, function in immunity and secrete various substances. A. True B. False
Answer:
True
Explanation:
True membranes must consist of a superficial layer of epithelial tissue and a layer of connective tissue on which it rests; and anchor organs in place, serve as barriers, function in immunity and secrete various substances
You discover a new sunflower that has blue flowers instead of yellow. When you cross this blue variety with a common yellow variety you get blue and yellow speckled flowers. What type of inheritance pattern does this gene exhibit?a. incomplete dominance. b. codominance.
c. simple Mendelian inheritance.
d. either incomplete dominance or codominance.
e. sex-influenced dominance.
Answer:
The correct answer is: B) codominance.
Explanation:
Codominance is a type of inheritance pattern that describes the relationship of two variations of the same gene: this means that in an individual, its two alleles manifest in the phenotype.
If a sunflower has both blue AND yellow speckles, it means that the two possible alleles are in a relationship, which makes these alleles CODOMINANT.
The rate at which your body consumes food energy to sustain basic functions is your: Group of answer choices Basal metabolic rate. resting metabolic rate. body mass index. set point.
Answer: Basal metabolic rate
Explanation: Basal metabolic rate is the rate at which the body consumes energy per unit time by endothermic animals at rest.
Basal metabolic rate is the amount of energy expended per unit of time to keep the body functioning even at rest.
The energy consumed by the body at rest to keep various involuntary body functions active is termed Basal metabolic rate. These involuntary body functions include breathing, heartbeat, etc.
_______consists of energy-releasing decomposition reactions. Such reactions break covalent bonds, produce smaller molecules from larger ones, and release energy that can be used for other physiological work. Energy releasing reactions are called exergonic reaction.
Answer:
The correct answer is: Catabolism.
Explanation:
The central nervous system is composed of the:________. a. brain and spinal cord. b. sympathetic and parasympathetic systems. c. autonomic and somatic systems. d. brain and somatic system.
Explanation:
The nervous system divides as, -(1) the peripheral nervous system and (2) the central nervous system . The central nervous system is the processing centre of the body. The central nervous system is consist of two parts ; (1) the brain and (2) spinal cord. The central nervous system is referred to as “central” because it received information from the body and then integrates the received information.
In the structural organization of many eukaryotic genes, individual exons may be related to which of the following? A) the various domains of the polypeptide product
B) the sequence of the intron that immediately precedes each exon
C) the number of polypeptides making up the functional protein
D) the number of start sites for transcription
In the structural organization of many eukaryotic genes, individual exons may be related to the following :
A) The various domains of the polypeptide product.
"Structural organization"In the structural organization of many eukaryotic genes, individual exons may be related to the following is the various domains of the polypeptide product.
The tertiary structure of the protein is made of different spaces. Each space of the protein has diverse work apportioned to them.
The exon is the utilitarian portion of the hereditary fabric.
The exon is portion of DNA which encodes for the portion of the develop RNA which is being delivered once all the introns have been evacuated after splicing.
Thus, the correct answer is A.
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Answer: Option A
Explanation:
The tertiary structure of the protein is made of multiple domains. Every domain of the protein has different function allotted to them.
The exon is the functional part of the genetic material. The exon is part of DNA which encodes for the part of the mature RNA which is being produced once all the introns have been removed after splicing.
It is the main part which decides the respective domain of the functional protein.
In 1964, Nirenberg and Leder used the triplet binding assay to determine specific codon assignments. A complex of which of the following components was trapped in the nitrocellulose filter?
Answer:
Charged tRNA
Explanation:
The first time the expereiment was performed was on the 15th of May in 1961 by two men Marshall W. Nirenberg and his post doc, J. Heinrich Matthaei. This experiment is now called the Nirenberg and Matthaei experiment where they used ruptured E.coli cells, RNA and labelled tRNA to decipher the triplet codon that matched to specific amino acid. By the time the experiment was complete the men had found 64 amino acid codons which was a large contribution to genetics and molecular biology.
Which regions of the vascular bed is the actual site of gas exchange with surrounding tissue?
Explanation:
Explanation:
Many biofilm-specific phenotypes are controlled by "quorum sensing." This system allows bacteria to regulate gene expression according to the concentration of in its immediate environment.a) trueb) false
Answer:
True
Explanation:
this has been seen as an evolutionary step in bacteria activity. it also allows them to control the activity of the the whole community
Answer: A) True
Quorum sensing is the system that allows bacteria to regulate gene expression according to the concentration of in its immediate environment.
Explanation: Quorum sensing is the process by which bacteria cells communicate among/within themselves and share information about their density and as well adjust their gene expression accordingly.
In quorum sensing ,there is production, detection and response of bacteria cells to Autoinducers (extracellular signalling molecules).
Increase in bacterial population density brings about the accumulation of autoinducers in the environment,the bacteria cell now monitors the information of the autoinducers inorder to track changes in their cell number and collectively alter their gene expression.
Quorum sensing controls the disease causing ability of a bacterial cell.
Transcription in eukaryotes requires which molecules in addition to rna polymerase?
Answer:i d k
Explanation:
Answer:
several transcription factors
Two-component regulatory systems rely on a balance of phosphorylation and dephosphorylation of sensor kinases and response regulators. If the response regulator became permanently phosphorylated due to lack of phosphatase activity, which of the following would NOT happen? Hints O The cell would become more sensitive to the environmental stimulus The cell would become insensitive to the environmental stimulus. The cell would not be able to "reset" its response cycle. O The operon controlled by the response regulator would be always transcribed or never transcribed, depending upon the regulatory role of the response regulator.
Answer:
The correct answer is the first statement.
Explanation:
A fundamental stimulus-response coupling mechanism that helps various species to react and sense different modifications taking place in various distinct environmental circumstances is known as a two-component regulatory system. Though this system is found in almost all the domains of life, however, it is generally witnessed in species like bacteria, mainly in the Gram-negative and cyanobacteria.
In case, if the response regulator turns completely phosphorylated because of the absence of phosphatase activity, the cell would become insensitive towards the environmental stimulus. This generally happens as the cell will lose its tendency to sustain the response cycle because of the imbalance in the dephosphorylation and phosphorylation system that helps in sustaining the response of the cell towards a specific environmental stimulus.
Hair turns color when we age because the follicles at the base of the hair shaft cease to produce melanin. Melanin is a chemical that gives the hair shaft its color (black, brown, blond, red, and all shades in between). The darkness or lightness of your hair depends on how much melanin each strand contains. With age, the cells in the follicle that produce melanin die off. As they do so, that hair strand will become silver, grey, or white, as it grows. a. Argument; conclusion: The follicles ... cease to produce melanin.
b. Argument; conclusion: Hair turns color when we age.
c. Argument; conclusion: With age, the cells in the follicle ... die off.
d. Nonargument.
e. Argument; conclusion: The darkness or lightness ... each strand contains.
Answer:
Explanation:
D