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What two forms of DNA did Franklin discover?
Rosalind Franklin discovered two forms of DNA: the A-form and the B-form. The A-form is a dehydrated version of DNA, appearing shorter and more compact, while the B-form is the more common, hydrated form that is typically found in biological systems. Her X-ray diffraction images provided crucial insights into the helical structure of DNA, particularly the dimensions and orientation of the B-form.
What important discoveries was first found in plants a the structure of DNA b the laws of heredity c the existence of enzymes d the nucleus?
a) The structure of DNA was first discovered in plants by James Watson and Francis Crick in 1953. b) The laws of heredity, also known as Mendelian genetics, were first discovered by Gregor Mendel while studying pea plants in the 19th century. c) The existence of enzymes was first discovered in plants by Eduard Buchner in 1897 when he found that crushed yeast cells could still perform fermentation. d) The existence of the nucleus was first observed in plant cells by Robert Brown in 1831 when he saw a structure inside the cells that appeared different from the rest of the cell.
Why is DNA called B-DNA?
B-DNA stands for "B-form DNA," which describes the common structural conformation of DNA. The "B" refers to the characteristic helical shape and right-handed twist of the DNA double helix. Different types of DNA, such as A-DNA and Z-DNA, have distinct structural features that distinguish them from B-DNA.
What letters does not represt one possible bases in the DNA structre a b c g?
B is not present. The nitrogen bases of DNA have letters A, C, G, T to represent it.
What is the difference between Z-DNA and B-DNA?
Z-DNA is usually found in areas with alternating purine and pyrimidine bases (ie. -ATATAT- ). When you look at it from the side, Z-DNA zig-zags toward the top left of the page/screen (This is essentially what it means when you read "left-handed helical form"), compared to B-DNA ("right-handed") which spins toward the top right. If you look at the top looking down the center of the molecule, B-DNA has no hole in the center (like in A-DNA) and is arranged with the bases in the middle, then the sugar, and then finally the phosphate backbone is at the edges. Z-DNA also lacks a hole in the center, but due to the zig-zagging structure, there is no definite area to locate the bases, sugar, and phosphate backbone -- they are all jumbled up together.
What two forms of DNA did Franklin discover?
Rosalind Franklin discovered two forms of DNA: the A-form and the B-form. The A-form is a dehydrated version of DNA, appearing shorter and more compact, while the B-form is the more common, hydrated form that is typically found in biological systems. Her X-ray diffraction images provided crucial insights into the helical structure of DNA, particularly the dimensions and orientation of the B-form.
What important discoveries was first found in plants a the structure of DNA b the laws of heredity c the existence of enzymes d the nucleus?
a) The structure of DNA was first discovered in plants by James Watson and Francis Crick in 1953. b) The laws of heredity, also known as Mendelian genetics, were first discovered by Gregor Mendel while studying pea plants in the 19th century. c) The existence of enzymes was first discovered in plants by Eduard Buchner in 1897 when he found that crushed yeast cells could still perform fermentation. d) The existence of the nucleus was first observed in plant cells by Robert Brown in 1831 when he saw a structure inside the cells that appeared different from the rest of the cell.
Who is the woman who along with Watson and Crick discovered DNA's double helix shape?
Rosalind Franklin. After discovering the existence of the A and B forms of DNA, Rosalind Franklin also succeeded in developing an ingenious and laborious method to separate the two forms, providing the first DNA crystals pure enough to yield interpretable diffraction patterns. She then went on to obtain excellent X-ray diffraction patterns of crystalline B-form DNA and, using a combination of crystallographic theory and chemical reasoning, discovered important basic facts about its structure. She discovered that the sugar-phosphate backbone of DNA lies on the outside of the molecule, not the inside as was previously thought. She discovered the helical structure of DNA has two strands, not three as proposed in competing theories. She gave quantitative details about the shape and size of the double helix. The all- important missing piece of the puzzle, that she could not discover from her data, was how the bases paired on the inside of the helix, and thus the secret of heredity itself. That discovery remained for Watson and Crick to make. Rosalind Franklin. After discovering the existence of the A and B forms of DNA, Rosalind Franklin also succeeded in developing an ingenious and laborious method to separate the two forms, providing the first DNA crystals pure enough to yield interpretable diffraction patterns. She then went on to obtain excellent X-ray diffraction patterns of crystalline B-form DNA and, using a combination of crystallographic theory and chemical reasoning, discovered important basic facts about its structure. She discovered that the sugar-phosphate backbone of DNA lies on the outside of the molecule, not the inside as was previously thought. She discovered the helical structure of DNA has two strands, not three as proposed in competing theories. She gave quantitative details about the shape and size of the double helix. The all- important missing piece of the puzzle, that she could not discover from her data, was how the bases paired on the inside of the helix, and thus the secret of heredity itself. That discovery remained for Watson and Crick to make.
What were some of Rosalind Francklin's achievements?
Rosalind Franklin's acheivements.-Discovered that DNA could crystalize into two different forms, an A and B -Developed an ingenious and laborious method to seperate the two forms, providing the first DNA crystals pure enough to yield interpretable diffraction patterns-Later found that DNA was the lead cause of aids, then after 2 months later she found the cure.-Discovered that the sugar-phosphate backbone of DNA lies on the outside of the molecule, not on the inside which was previously thought-Has gave quantitative details about the shape and size of the double helix-Written four papers on the challenge, the structure of the virus called, the Tobacco Mosaic virus
Why is DNA called B-DNA?
B-DNA stands for "B-form DNA," which describes the common structural conformation of DNA. The "B" refers to the characteristic helical shape and right-handed twist of the DNA double helix. Different types of DNA, such as A-DNA and Z-DNA, have distinct structural features that distinguish them from B-DNA.
What is the full name for B DNA?
B DNA stands for B-form DNA, which refers to the most common structural form of DNA found in nature.
Beryllium was discovered by who?
beryllium was discovered by Jean b
Are a DNA strand can consist on z DNA and b DNA?
Yes, a single DNA strand can have Z-DNA and B-DNA forms at different regions.These forms can exists at different sections on the same strand but never simultaneously at the same region since they contradict each other. The vast majority of DNA is in the B form.B-DNA is a right-handed double helix that twists 360 degrees every 10.0 base pairs.Z-DNA is a left-handed double helix (this causes the phosphate backbone to zigzag) there are about 12.0 base pairs per 360 degree turn. This form contains extended repeats of G-C base pairs. Organisms do show evidence of having Z-DNA in living cells but its physiological role is currently unknown (although recently it has been hypothesized to play a part in gene control).
Has the structure of DNA changed over time?
Although there are three forms of DNA that have been discovered (A form, B form and the Z form), the structure of DNA itself is the same in all organisms. DNA may be packed differently or may contain additional chemical groups attached to the bases (like methylated DNA). However, the structure of DNA is similar in all organisms. This is the reason why it has been named the molecule of life.
Difference between Z-DNA and B-DNA?
B DNA is the normal kind where it twists in what is called a right hand fashion. Z DNA is twisted in the opposite direction.
What is the name given to DNA by Watson and crick?
B dna
What DNA strand is most common?
The most common DNA helix is B-DNA.
