Through expanding, some galaxies are on a collision course with us.
Explanation:
Unclear question. However, I inferred you are referring to this clear rendering of the question:
Determine the degree of pollution with household waste in your neighborhood or your locality:
1. List the human and administrative (social) causes that led to such a situation.
2. What actions must be taken to solve the given problem?
3. What should be your contribution in solving the problem of environmental pollution?
4. Write an essay on the topic: "My community - the beneficial space for work."
Answer:
The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell, and that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell.
Explanation:
If about 30% is A then 30% is T. That leaves 40% to be G + C...so each must be around 20%.
Answer:
A Ligase
B False
C To separate the double‑stranded DNA
Explanation:
The Polymerase Chain Reaction (PCR) is a technique widely used in molecular biology laboratories in order to make millions of copies of a specific sequence of DNA. PCR requires deoxynucleotide triphosphates (dNTPs) to synthesize new copies of the target DNA fragment, a thermostable DNA polymerase that adds nucleotides to new DNA strands, and primers that attach to complementary ends at each DNA strand. PCR has three phases: 1-Denaturation, where the double-stranded DNA molecule is heated to separate it into two single (separated) strands; 2-annealing, where the temperature is lowered in order to allow the primers to attach each DNA strand, and 3- extension, where the temperature is increased (again), and the thermostable DNA polymerase adds the appropriate dNTPs to new DNA strands. In consequence, annealing occurs at the lowest temperature. Moreover, during the denaturation stage, the temperature is increased at 90–95°C in order to denature the DNA strands into single strands.
