Indicate whether each of the following words or phrases applies to proteins, dna, or both. a. a macromolecule composed of a "string" of subunits b. double-stranded c. four different subunits d. 20 different subunits e. composed of amino acids f. composed of nucleotides g. contains a code used to generate other macromolecules h. performs chemical reactions

a. A macromolecule composed of a "string" of subunits stands both for DNA as well as proteins. Both are the macromolecules (large molecule) made of their respective subunits ( DNA made of polynucleotides and Proteins made of amino acids) and contains the stretch of monomers in their structure.

b. Double-stranded stands for DNA as DNA is a double stranded molecule contains two nucleotide chains runs with anti parallel polarity. The one strain has polarity in 5' to 3' direction and other strand has polarity in 3' to 5' direction.

c. Four different subunits stands for DNA. DNA contains the four nitrogenous bases adenine, guanine, thymine and cytosine. These four different nitrogenous bases with deoxyribose sugar and phosphate group may be responsible for the four different subunits of DNA.

d. 20 different subunits stands for proteins. 20 different standard amino acids are known for the formation of proteins. These 20 different amino acids makes the subunits.

e. Composed of amino acids stands for proteins. Proteins are the polymers of the amino acids. Amino acid contain the amine group, carboxylic acid group, hydrogen and R hydrocarbon chain.

f. Composed of nucleotides stands for DNA. DNA are the polymers of nucleotides. The nucleotide contains nitrogenous base, pentose sugar and the phosphate group.

g. Contains a code used to generate other macromolecules stands for DNA. DNA contains nitrogenous bases in the form of codes to generate RNA as well as protein.

h. Performs chemical reactions stands for proteins. Enzymes are made of protein that are responsible for the metabolic and enzymatic reactions of the body.

advantage of using stem cells in medical research:

1.       it provides medical benefits in the fields of therapeutic cloning and regenerative medicine.

2. it provides great potential for discovering treatments and cures to a variety of diseases including parkinson disease, spinal cord injuries, diabetes, alzheimer’s disease and many more.

3. limbs and organ could be grown in lab from stem cells and then used in transplant or treat illness.

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.