Hwlp! which of the following statments about the primary structure of a protein is NOT true?
the most inappropriate answers would be 1 and 2. 3, 4 and 5 are true. however if it was an exam question i would choose 1 to be the untrue one. option 2 seems a little too vague. but there is definitely no branching in the primary structure of proteins, that's for sure (: @layercakex3 the primary structure of proteins do affect the tertiary structure because the different sequence of amino acids, different nature of the R groups on amino acids and different types of R groups on amino acids will determine how a protein will fold further to form its tertiary structure (:
Which of the following is (are) true of snRNPs?
The answer is E. PROOF: are particles that combine with pre-mRNA and various proteins to form spliceosomes (Both A and C) The precise beginnings and ends of introns on the primary transcripts are marked by signals by which the snRNPs can recognize and remove them (B)
Which of the following macromolecules is primarily responsible for the insolubility of cell membranes in water?
Phospholipids! The phospholipid bilayer is composed of hydrophobic heads on the outside and hydrophillic chains on the inside. The only way water can pass through the cellular membrane is through channels or pores specifically designed to pass water through. Water simply can not pass through the cellular membrane. It is insoluble.
In eukaryotic cells the first step in protein synthesis is the _____?
Nucleic acids are the cell's information molecules. There are two kinds of nucleic acids: Deoxyribonucleic acid, or DNA, and ribonucleic acid, or RNA. DNA makes up the cell's inherited library of information-- the genes. DNA carries instructions for building all the proteins that carry out cell activities. RNA acts as an intermediary in the protein-making process. DNA's information is transcribed into RNA, which is then translated into the primary structure of proteins. so the question is In eukaryotic cells the first step in protein synthesis is the _____. a. translation of an RNA nucleotide sequence into a sequence of amino acids b. transferring of information from DNA to messenger RNA c. removal of introns from RNA and the stitching together of exons d. translation of a DNA nucleotide sequence into a sequence of amino acids e. linking of nucleotides to form a polypeptide So i chose D. Can someone help me guess why i thought i chose D. I know that is the wrong answer but i guess i am having trouble interpreting this pharagraph. any tips on how to better read this pharagraph
What is the relationship between the following words- cells,genes,chromosomes,tissue... and protiens?
tissues are made of cells that contain chromosomes made of DNA with regions called genes that code for proteins.
What is the difference between hormones and neurotransmitters?
Hi there…Human body maintains its homeostasis under different stress conditions with the help of central nervous system (through neurotransmitter), endocrine system (through hormones) and immune system (through antibodies and specialised cells). All the three major systems work in synchrony to regulate the body function smoothly under all diverse situations of fight or flight. Hormones and neurotransmitters are two separate chemical messengers with some similarities as some molecules can act as both hormones and neurotransmitters as well. One example of this overlap is norepinephrine which can be released into the bloodstream by the adrenal glands as a hormone or can be released by sympathetic nerve endings as a neurotransmitter.Figure- The synchrony between the three major system of human bodyThe major differences between hormones and neurotransmitters are as follows-• Neurotransmitters belong to the nervous system, whereas hormones belong to the endocrine system.• Transmission of neurotransmitters is across the synaptic cleft, whereas that of hormones is by blood.• Hormones are produced by endocrine glands while neurotransmitters are produced by neurons.• Target cells of neurotransmitters can be specific neurons or other cells, whereas that of hormones can be some distance from endocrine gland.• Action of neurotransmitters is extremely fast, which could be up to few milliseconds. In contrast, effect of hormones could be last for a long period which could be in the range of few seconds to few days.• Examples for neurotransmitters include acetylcholine, dopamine and noradrenaline, whereas examples for hormones include ADH, GH, PTH, Oxytocin, insulin, glycogen etc.• Hormones are able to regulate their target organs, whereas neurotransmitters are able to stimulate the postsynaptic membranes.Hope it helps.