Answer:
The options to this question are missing, they are:
A) All the proteins the cell creates from the miscopied strand will do different jobs than the old ones.
B) Any miscopied DNA will be replaced with an accurate DNA copy once the cell divides.
C) Both new DNA strands will end up together in a new cell, and the inaccurate one will be discarded.
D) If the new sequence codes for the same amino acid as the original cell, it will function normally.
THE CORRECT ANSWER IS D
Explanation:
What occured to this cell replicating its DNA is called MUTATION, which is a change (small or big) in the nucleotide sequence of a DNA. The miscopied base will alter the nucleotide sequence of the DNA. Since a single base is involved, it is referred to as a POINT MUTATION.
A point mutation, such as the one in this case, can produce varying effects in the resulting organism. The mutation can either lead to a different protein in that particular sequence the mutation occured or have no effect on the organism.
The mutation will have no effect on the organism in a case where the base that was miscopied produced a codon that codes for the same amino acid as the original codon. Hence, the same protein will be produced and have both effect on the cell. This is possible because of the degenerate nature of the genetic code, as more than one codon codes for a given amino acid.
B) Many animals are captured or killed by poachers, significantly reducing their numbers.
C) Viral epidemics that break out in human populations spread to animals in the ecosystem.
D) Factories cause a significant rise in temperature in the forests, endangering many species.
Answer: A) Urbanization leads to deforestation and loss of habitat for many species.
Explanation:
Urbanization is the main reason for the exploitation of the rain forests which has lead to the extinction of species used to be residing in the forests ecosystems. Following are the factors which are responsible for such disaster with the expension of urbanization:
1. Infrastructure: The land is the main requirement which is responsible for the exploitation of rain forests. The large area is required for the accommodation of the large human population, construction of roads, highways and bridges. This has replaced many habit-ant animals from their native land and also leads to extinction due to ecological disturbance.
2. Increasing needs of food, herbs and wood: Many species of wooden trees could be found in the rain forests which have now extincted due to increasing demand for wood. The herbs have been wiped up for the preparation of medicines and drugs. The large number of tree populations are also exploited due to availability of fruits, and vegetables.
3. Wildlife trafficking and hunting: Some of the animal species have been included in the list of endangered species due to their use for commercial selling of horns, hives and other valuables.
Answer:
The main function of RNA is to carry information of amino acid sequence from the genes to where proteins are assembled on ribosomes in the cytoplasm.
Explanation:
This is done by messenger RNA (mRNA). A single strand of DNA is the blueprint for the mRNA which is transcribed from that DNA strand. One of these active processes is protein synthesis, a universal function in which RNA molecules direct the assembly of proteins on ribosomes. This process uses transfer RNA (tRNA) molecules to deliver amino acids to the ribosome, where ribosomal RNA (rRNA) then links amino acids together to form proteins.
The domain in which this organism is included is Eukarya. As the name indicates, Eukarya domain includes all the organisms which are made up of eukaryotic cells. Eukaryotic cells are kind of cells which have well defined nucleus and membrane bound organelles.
Further, this domain named Eukarya comprises 4 kingdoms which are mentioned as under:
1) Plantae
2) Animalia
3) Fungi
4) Protista
These 4 kingdoms include several organisms of varying characteristics but an organism having the mentioned characteristics i.e. multicellular, makes its own food, and is unable to move around its environment is specifically included in Kingdom Plantae.
Answer:
Although an increase in body weight can be noticed after 2 weeks, the increase is gradual and becomes apparent after 4 weeks. After 16–20 weeks of high-fat diet feeding, mouse will typically exhibit 20–30% increase in body weight when compared to chow-fed mouse (9).
b. news about a scientific discovery reaches the public sooner.
c. only the most exciting experiments are published.
d. a hypothesis is accepted without any supporting evidence.
Answer: A. A scientific paper is a reliable source of information.
Explanation:
A peer review is a kind of analysis of the research outcome by the people who generally exhibit the same competency as that of the author or researcher and knowledge for a particular subject or topic in which the research has been conducted. Such a process makes the research outcome more authentic and reliable. The author learns to improvise the research process and corrects the mistakes after the peer review.
Answer:
The correct answer is : A scientific paper is a reliable source of information.