Monomers are the basic units of larger molecules-macromolecules. These units are connected via chemical bonds and when joined in repetition, a polymer is formed.
Monosaccharides (simple sugars) are monomers that form complex sugars-polysaccharides (long chains of monosaccharides usually form the energy-storing molecules found in food) by creating glycosidic bonds. Those linkages vary widely in geometry (can be linear and branched). Besides that, monosaccharides can have different functions in the organism and monomers vary extensively (in the orientations of hydroxyl groups and in location).
Monomers of nucleic acids (deoxyribonucleic acid-DNA and ribonucleic acid-RNA) are nucleotides composed of a five-carbon sugar, a phosphate, and a nitrogenous base. Monomers of nucleic acids do not vary that much, there are only four different monomers that include adenine and guanine, which are derived from purine; and cytosine and thymine (for DNA) or uracil (for RNA), derived from pyrimidine.
Answer:
Polymerase chain reaction (PCR)
Explanation:
Polymerase chain reaction (PCR) is a method by which a target DNA fragment is amplified to produce millions of copies. In PCR, the Taq polymerase enzyme uses nucleotides and primers to replicate a small DNA segment <em>in vitro</em> and produces two DNA molecules. The newly formed DNA molecules are denatured by heating to facilitate their replication to produce four double-stranded DNA molecules. In this way, the number of DNA molecules is doubled in each cycle. Therefore, the small amount of DNA obtained from the minuscule spot of blood on a murder suspect’s shirt can be amplified using PCR.
<h3><u>Answer;</u></h3>
has 6 legs/has 8 legs
has wings/does not have wings
has one pair of wings/has two pairs of wings
<h3><u>Explanation</u>;</h3>
- Dichotomous keys are biological keys which are sets of statements that act as clues leading to the identification of an organism.
- Dichotomous key is a biological tool for identification of unknown organisms.
- A single characteristic is considered at a time. Two contrasting statements are put forward to describe the characteristics in such a way as to separate the organisms, which continues until the organisms have been identified.
Answer:
D
Explanation:
Facilitated diffusion is a form of passive transport hence no energy is required by the cell. This means that while the molecules are moving down a concentration gradient – line normal diffusion – the movement of the molecules needs to be facilitated (in this case by a transmembrane protein) either because the molecule is polar and can't pass through the hydrophobic region of the cell membrane, or the molecule is too big to passively pass through the small natural pores of the cell membrane.
