Molecular Biology of The Cell – Alberts chapter 002 Test Bank With Correct Answers 2023/2024
How many species are there? correct answers Around 8.7
... [Show More] Million
Most living organisms have how many cells? correct answers Most are single celled organisms
Others, such as ourselves, are multicellular organisms in which groups of cells perform specialized functions and are linked by intricate systems of communcation.
How many cells does a human body have? correct answers 10¹³
How are human cells generated? correct answers The whole is generated from cell division
What is the "vehicle" for hereditary information for organisms? correct answers The cell, which carries the hereditary information that defines the species.
And specified by this information, the cell includes machinery to gather raw materials from the environment and to construct out of them a new cell in its own image.
How long have living cells been evolving? correct answers 3.5 Billion years
Where do all living cell store their hereditary information? correct answers In DNA.
What is DNA's Structure? correct answers Double stranded molecules - long unbranched paired polymer chains, called strands, twisted into a double helix made from the same four monomers - A, T, C and G - and they are strung together in long linear sequences that encodes the genetic information, just as the sequence of 1s and 0s encode the information of a computer file.
Parts of a nucleotide? correct answers sugar (dioxyribose) with a phosphate group attached to it, and a nitrogen-containing base, which may be either adenine, guanine, cytosine or thymine.
Each strands are liked via sugar-phosphate group linkages, creating a polymer chain composed of repitive sugar-phosphate backbone with a series of bases protruding from it.
Concept: A single isolated strand, can be, in principle added in any orgder, because each links in the same way. correct answers Basically, A will always go to T, C always to G and the phosphates will always link to the sugar, etc.
What are the bond between nucleotides on opposide strands? correct answers Weak hydrogen bonds - This allows the two DNA strands to be pulled apart without breakage of their backbones.
Each strand can then serve as a template for the stnthesis of a fresh DNA strand complementary to itself - a fresh copy, that is, of hereditary information.
The bonds between nucleotides on individual strands? correct answers Strong covalent bonds
DNA Replication correct answers The process by which a copy of DNA ia made [Show Less]