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Molecular models show a DNA double helix that is packed in a chromosome in Part a, and two proteins are shown in Parts b and c.
Genes, which are carried on (a) chromosomes, are linearly organized instructions for making the RNA and protein molecules that are necessary for all of processes of life. The (b) interleukin-2 protein and (c) alpha-2u-globulin protein are just two examples of the array of different molecular structures that are encoded by genes. (credit “chromosome: National Human Genome Research Institute; credit “interleukin-2”: Ramin Herati/Created from PDB 1M47 and rendered with Pymol; credit “alpha-2u-globulin”: Darren Logan/rendered with AISMIG)

Since the rediscovery of Mendel’s work in 1900, the definition of the gene has progressed from an abstract unit of heredity to a tangible molecular entity capable of replication, expression, and mutation ( [link] ). Genes are composed of DNA and are linearly arranged on chromosomes. Genes specify the sequences of amino acids, which are the building blocks of proteins. In turn, proteins are responsible for orchestrating nearly every function of the cell. Both genes and the proteins they encode are absolutely essential to life as we know it.

Questions & Answers

how are you studying in this quarantine? .. how are you keeping yourselves motivated?
what is the important of sex
Aremu Reply
why did human being need sex?
Aremu
because he/she have feelings
Chripine
reproduction...to make more
Yazi
due to active harmon
Manish
One important of sex is to reproduce
Emma
to ensure the countinuty of life
Yusuf
all of you are right
Edith
what is momentum
Asiya Reply
The strength or force that allows something to continue or grow stronger or faster as time pass
Emma
What is Centripetal Force?
Justin
centrepital force is the inward force required to keep a body moving with constant speed in a circular path
Yusuf
what is the test for protein
Takii Reply
List four condition necessary for seed germination
Tedeka Reply
water,air(oxygen),light,temperature
Hassan
water, light, oxygen and temperature
lilchris
importance of biology
Alabina Reply
importance of boilogy
Alabina
what is soil
Amina Reply
soil is the upper part of the earth
Alabina
what is importance of studying biology
Alabina
soil is the uppermost layer of the earth on which plant grows
Yusuf
soil is defined as the thin surface of the upper most layer of the earth crust on which plants grow
Thanni
soil is the upper part of the earth which plants grow on
Emma
differences between euglenoid and amoeboid
Grace Reply
what are the difference between aerobic and anaerobic respiration?
Maxwell Reply
Aerobic respiration involves the use of oxygen whiles anaerobic respiration does not involve the use of oxygen
Quabena
what is assmilation
Lucy Reply
what is cell
Manish Reply
cell is the structural and functional unit of life or living things
hamid
where anaerobic respiration occurre?
Manish
in cell
Manish
in cells?
Manish
where anaerobic respiration occurre in cell?
Manish
what's phloem?
Gift Reply
what is different between Latin name and common names
mary Reply
hey
Gift
what's enzyme
Gift
what structure help root hair cells to take up water.
Jackson Reply
which two part of a plant cell are affected when the is immersed in sucrose solution?
Jackson
which two part of a plant cell are affected when the is immersed in sucrose solution?
Jackson
the xylem cells absorbs water and mineral salt from the soil to all part of the plant.
Nana
And the phloem cell take up food prepared from the leaves to all part of the plant
Nana
what is genetic engineering
Mavis Reply
what are the three main type of ecosystem
Mavis
biosphere,
Bigenis
biosphere
Adeniyi
where anaerobic respiration occur?
Manish
lupin plant what does it look like
Miracle

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Source:  OpenStax, Biology. OpenStax CNX. Feb 29, 2016 Download for free at http://cnx.org/content/col11448/1.10
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