Answer:
The correct answer is two layers of phospholipids,with their polar hydrophilic heads facing away from each other.
Explanation:
The plasma membrane of a cell contain lipid bilayer.Each monolayer contain phospholipids.The hydrophobic tails of the phospholipid of both the monolayers faces each other in the hydrophobic region where as the hydrophilic heads of the phospholipid molecules of both the monolayers are oriented away from each other.
The right answer is The digestion of DNA by restriction enzymes.
The fragmentation of the DNA is done by bacterial enzymes called restriction enzymes.
Restriction-enzymes (or endonucleases) recognize and cut the DNA into a specific sequence. These enzymes are naturally produced in bacteria as a defense against bacteriophages - viruses that infect bacteria. The bacterial restriction enzymes cut the DNA of the invasive bacteriophage while leaving the bacterial genomic DNA healthy and safe through the addition of methyl groups.
These enzymes are used in practice at the laboratory level to explore DNA.
Answer:
B. tRNA molecules bring amino acids for the ribosome to link together.
Explanation:
Transfer ribonucleic acid (tRNA) is a type of RNA molecule which are responsible for the decoding of messenger RNA (mRNA) into protein. During translation, with the help of tRNA, protein in the form of amino acid is produced from a messenger RNA molecule. The tRNA recieves message of nucleic acid and formed protein according to the instructions.
Answer:
As I am the member of the city council, I would prefer nuclear power plant as the best for community instead of using a new coal-burning plant.
Explanation:
- The nuclear plant don't emit harmful gasses like carbon dioxide, sulfur dioxide, nitrogen oxides, mercury, or other toxic gases which is harmful to the living beings.
- It is the alternate method to decrease the rate of air pollution so it is friendly to the environment as well as Eco-system.
- Although the nuclear plant is expensive but the requirement is less than Coal-burning plant.
I believe heterotrophs are organisms that get their energy by eating other organisms. These organisms are also called predators