Answer:
denaturing of the peptide bonds
Explanation:
Enzymes are proteins that help speed up chemical reactions. However, they require specific temperatures and pH's to work optimally and produce the best outcome.
If an enzyme is placed in a lower than optimal pH, that means that there are more H+ ions, and the environment is more acidic. This influx of H+ ions can denature the peptide bonds within the enzyme, causing it to fold in a different way and be unable to carry out its normal duties. Hence, the activity of the enzyme will decrease significantly.
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Answer:
The correct order would be:
b. "Unwind the DNA molecule near the promoter."
d. "Transcribe the complementary RNA strand."
c. "Exit the nucleus to the cytoplasm."
a. "Combine the mRNA strand with a ribosome and a tRNA carrying a methionine."
The given order is according to the central dogma of a cell. According to central dogma DNA is first transcribed into mRNA which is then moved out of nucleus (in eukaryotic cells).
For transcription, the DNA is unwind near the promoter region where transcription factors and RNA polymerase binds the template strand. It then make mRNA which is moved out of the nucleus.
The mRNA then is translated with the help of ribosome and tRNA. The start codon in mRNA usually codes for methionine due to which tRNA carrying methionine recognises the start codon and initiate the process of translation.
O DNA comparisons
o observations
O comparison of fossils
O experimentation
Answer:
DNA comparisons
Explanation:
The molecular nature of DNA and its role in inheritance and evolution was not known during Darwin's time. Therefore, it was not possible to compare similarities in DNA sequences between different species to understand their evolutionary relationships.
This type of method was not in regular use until the 1980s/1990s, when sequencing and DNA amplification technologies were invented
B. distilled water
C. iron sulfide
D. oxygen gas
E. seawater
F. sodium chloride
Answer: db a
Explanation:
Answer:
"The main role of plasma is to take nutrients, hormones, and proteins to the parts of the body that need it. Cells also put their waste products into the plasma."
b. Suppose an unusual heritable characteristic helped animals to live longer but made them sterile so they could not have any offspring. Explain why this heritable characteristic would not become more common in subsequent generations as a result of evolution by natural selection.
Explanation:
a. Some novel traits become fixed within a population, as they confer advantageous adaptations to an individual within their environment. These adaptations let these individuals live longer than their counterparts, and mate to produce more offspring over time, who also possess these traits.
b. For natural selection to act on a trait, it must confer a particularly beneficial advantage, and it should also be passed on to various offspring capable of surviving and reproducing at a higher rate. Without the ability to reproduce, natural selection cannot occur and is not influenced by an individual's fitness.
Natural selection leads to evolutionary change when individuals with certain characteristics have a greater survival or reproductive rate than other individuals in a population and pass on these inheritable genetic characteristics to their offspring.
Further Explanation:
Genetic variation has an important impact on small populations. There, mutations add up over time in a population, modifying the distribution of alleles or various forms of a gene. Natural selection may lead to loss of diversity in a population through genetic drift; one trait's allelic frequency increases significantly while others become less prevalent. Usually these differences exist because of occurrences of mutation and recombination.
Spontaneous changes within the genome occurring during the cycle of cell division are called mutations. These are defects of copies of the DNA produced within the cell; mutations may range from small modifications called single nucleotide polymorphisms to large-scale deletions and multi-gene additions.
Such mutations create variants which, within a group, become permanent, resulting in the creation of different, genetically distinct populations called species. Mutations occur over time in a population, changing the distribution of alleles or various forms of a gene-this is called genetic drift.
Learn more about mutations at brainly.com/question/4602376
Learn more about DNA and RNA at brainly.com/question/2416343?source=aid8411316
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The organism that live in water get oxygen from the oxygen that is dissolved in water.
Oxygen is a gas, that is present 18% in the environment. The oxygen is an important for living beings because all are activities of our body is run by oxygen.
The water also contain oxygen in the dissolved form, which is used by the water organism.
Thus, the oxygen that is dissolved in water.
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Answer:
Most organisms that live in water get oxygen from the dissolved water in the oxygen.