Answer:
The correct answer is - 1. a metal hammer
4. the metal frame of your chair
6. the screws and nails that hold your desk together.
Explanation:
Bar magnets are rectangular objects made up of ferromagnetic objects or substances and must carry the north and south pole ends. These objects show ferromagnetism and attract any ferromagnetic metal such as iron, steel or ferromagnetic composite.
In the case of the same ends, for instance, the north-north pole of two magnets repulse and opposite attract to one another. From the given options the correct answer is a metal hammer, the metal frame of chair and screws and nails that hold the desk.
Answer:
D. Plasmids are nucleic acids which can pass on traits
Explanation:
A Nucleic acid is one of the four biomolecule polymers in living systems. It is made up of monomeric units called Nucleotides. RNA and DNA are the two nucleic acids in existence and they function in storage and expression of genetic information.
According to the question, a colony of bacteria that can break plastics were mixed with the colony that can't break plastics. The two different colonies engage plamids, which conferred the ability to break plastics to some of the colonies that previously couldn't. This tells us that the ability to break plastics in the certain bacteria colony is GENETIC.
If the trait is genetic, the plasmid must be a nucleic acid because of the ability to genetically pass on traits. Note that, a plasmid is an extra-chromosomal DNA (nucleic acid) capable of replicating on its own. Hence, plasmids are nucleic acids which can pass on traits.
Answer:
is bound to the constant region of the secondary antibody.
Explanation:
Enzyme immunoassays are the techniques used to detect the presence of antigens with the help of antibodies. Each of the antibody molecules has a constant and variable region.
The primary antibodies are added to the wells. The constant region of the secondary antibody is bound to an enzyme while its variable region is free so that it can bind to the specific antigen.
Addition of substrate to the system is followed by visualization and/or evaluation of antigen as the reaction between enzyme and substrate produce some visible changes such as color change.
It is a very long sequence, written in code, that needs to be transcribed and translated before a cell can make the proteins that are essential for life. Any sort of changes in the DNA sequence can lead to changes in those proteins, and, in turn, they can translate into changes in the traits those proteins control.
Answer:
C. obtain energy or reassemble the resulting materials to form different compounds
Explanation:
Organisms can break down organic bonds (usually C-C bonds) to produce chemical energy, especially in the form of Adenosine triphosphate (ATP). In living cells, ATP is considered to be the 'cell's energy currency' because this molecule provides energy for diverse cellular processes. Moreover, small organic molecules generated by chemical breakdown can also be reutilized in metabolic pathways in order to synthesize new (more complex) macromolecules. For example, fatty acids generated by the breakdown of longer lipidic macromolecules can be reutilized in different metabolic pathways to produce structural building blocks of the cell.