Answer
3,1,2,4
Explanation:
Through the mechanism of RNA interference (RNAi), short RNAs can inhibit gene expression. RNAi can function at transcriptional level, translational level, and mRNA stability.
RNAi mechanism has numerous biological functions; it can affect development, for instance in the worm C. elegans, or it can be utilized by plants to evade viral infection.
These short RNAs (abt 23 bp long) also known as siRNAs (short interfering RNAs) are products of long dsRNAs which are cleaved by nuclease Dicer. The siRNAs regulate a nuclease complex called RISC (RN-induced silencing complex) leading to repression of gene expression via three distinct ways;
a) Destroy mRNAs that have complementary sequence with the siRNA
.
b) Inhibit translation of mRNAs that have complementary sequence with the siRNA.
c) Induce chromatin modification within the promoter of these homologous (complementary) genes, thus silencing them.
You can tell a lot from someone's urine. Firstly just looking at urine one could see if a patient has hematuria or the concentration of the urine. These can indicate UTIs, Kidney Disease, Dehydration, or Diabetes. Further analysis can provide some much more like quantities of vlood, proteins, etc...
Answer:
Amino acids contain nitrogen; fatty acids and sugars do not.
Explanation:
Genetic material is made of nucleotides, which contain amino acids; fatty acids and sugars are not part of genetic material. - this is false. Genetic material is made of nucleotides, but they are made of a sugar, phosphate group, and a nitrogenous base. Genetic material is transcribed then translated into a string of amino acids called a polypeptide chain.
Amino acids are building blocks to larger molecules; fatty acids and sugars are not. - false, amino acids are building blocks to larger molecules called proteins However, sugars are also building blocks for polysaccharides like starch, and fatty acids can combine to form triglycerides
Amino acids contain nitrogen; fatty acids and sugars do not. - this is true. Fatty acids and sugars are made of carbon, hydrogen, and oxygen. Amino acids contain carbon, hydrogen, oxygen, and nitrogen. They also sometimes contain other molecules in their R groups e.g. Sulphur.
Amino acids make up proteins, which provide energy for the body; fatty acids and sugars do not provide energy. - this is false, fatty acids and sugars can also provide energy
What are the statements?
an inference is a conclusion reached on the basis of evidence and reasoning
examples:
if you see someone eating a new food and he or she makes a face, then you infer he does not like it
if someone slams a door, you can infer that she is upset about something.
The blood sample has only antigen B on the red blood cells and antibody A in the plasma. This indicates that the blood group type is B.
The negative and the positive sign of the blood group is determined by looking at the presence of another antigen called the Rhesus factor or RhD factor. The presence of RhD antigen in RBC is denoted by a '+' sign next to the blood group.
Since the question does not mention about the presence of RhD factor, the blood can be either B+ or B-.