Ribozymes Study guides, Class notes & Summaries

Primavera Biology B Unit 4: Evolution Questions and Answers Graded A CHECKPOINT 17 What gas present in today's atmosphere was largely absent from early Earth's atmosphere? oxygen What are some possible sources for early organic molecules? Select all that apply. existing inorganic molecules forming into more complex organic ones by using energy from lightning simple inorganic compounds arriving on Earth through meteorites or other objects Which option correctly replaces X and Y? The Mill...

Biology 1406 EXAM 2 questions n answers rated A+ In a closed system from which no energy can be removed and to which none can be added from outside, - correct answer Potential energy decreases, and entropy increases Catalysts essentially equal to enzymes but made of RNA are - correct answer ribozymes Which cellular component is responsible for the regulation of exchanges of substances between a cell and its environment? - correct answer the cell membrane Cells with greater than diploid...

Brooks Biodiversity Unit 1 Exam with Complete Solutions evolution the concept that all given organisms are related to each other though common ancestry Have scientists proven that life exists? No Big Bang Theory of how the universe formed 16-18 billion years ago Symbiosis the interaction between two different organisms living in close association "life coming together" Spontaneous Generation Theory that life arose spontaneously from inanimate matter. Not a widely held beli...

Fungi - cell wall made of chitin; Eukaryote Algae - cell wall made of silicates, eukaryotic Protozoa - Eukaryote Bacteria - Prokaryotic Virus - Acellular; only reproduce if they are inside of a living cell What allows a substance to cross a membrane - Protiens Substances that will never pass through a membrane - Charged substances Passive movement processes - No ATP needed 1. Diffusion 2. Facilitaed Diffusion 3. Osmosis Active Transport processes - Uniport Aniport Sy...

Biology 1406 EXAM 2In a closed system from which no energy can be removed and to which none can be added from outside, - correct answer Potential energy decreases, and entropy increases Catalysts essentially equal to enzymes but made of RNA are - correct answer ribozymes Which cellular component is responsible for the regulation of exchanges of substances between a cell and its environment? - correct answer the cell membrane Cells with greater than diploid chromosome numbers, as is the ...

Eukaryote : An organism whose cells contain complex structures enclosed within membranes. The defining membrane bound structure thats sets them apart from prokaryotic cells is the nucleas or nuclear envelope within which the genetic material is carried. All species of large complex species are eukaryotes, including animals, plants and funghi. Euchromatin : This shows as pale areas in the nucleas under electro magnification. It is a less densly packed form of chromatin; 10% is even l...

First cells would have been autonomous, membrane-bound units capable of self-replication requiring - ANSWER-nucleic acids RNA - ANSWER-• RNA has catalytic activity (ribozymes) .• First enzymes could have been RNA. • Earliest self-replicating molecules could have been RNA. • Proteins are better catalysts and DNA is more stable than RNA Earliest organisms: - ANSWER-• Probably primary heterotrophs .• Derived nutrients from the environment. • No need to synthesize own food aut...

Biology 1406 EXAM 2 Collin College - Question and answers verified to pass Biology 1406 EXAM 2 In a closed system from which no energy can be removed and to which none can be added from outside, - correct answer Potential energy decreases, and entropy increases Catalysts essentially equal to enzymes but made of RNA are - correct answer ribozymes Which cellular component is responsible for the regulation of exchanges of substances between a cell and its environment? - correct answer t...

Microbiology Final Exam Straighterline Questions and Answers 100% Pass The study of evolutionary relationships among organisms is called ______. phylogeny The three cell types discussed, eukaryotes, archaea, and bacteria, all derived from ______. Last Universal Common Ancestor Organisms called parasites are ______. always harmful to their host Which of the following does not indicate microbe involvement in energy and nutrient flow? Thermal hot springs warmed by heat from earth's ...

RNA polymerase - ANSWER pries the two strands of DNA apart and joins the RNA nucleotides as they base-pair along the DNA templates promoter - ANSWER DNA sequence where RNA polymerase attaches and initiates transcription Synthesis of RNA transcript - ANSWER initiation; elongation; termination synthesis of RNA transcript initiation - ANSWER after RNA polymerase binds to the promoter, the DNA strands unwind, and the polymerase initiates RNA synthesis at the start point of the template stra...