Answer:
24 % Thymine (T)
Explanation:
Chargaff's rules indicate that in double-stranded DNA, the proportion of Adenine (A) is equal to the proportion of Thymine (T), while the proportion of Guanine (A) is equal to the proportion of Cytosine (C). Since double-stranded DNA has 24% A, it means there will be 24% T.
Moreover, in this case, the A + T content in the double-stranded DNA is 24 + 24 = 48%, while the G + C content is 48 - 100 = 52%, i.e. G = 26% and C = 26% (26 + 26 = 52).
In DNA, the amount of adenine is always equal to the amount of thymine due to the base pairing rules or Chargaff's rules. Therefore, if a DNA helix has 24% adenine, there would be 24% thymine as well.
In DNA, the amount of adenine (A) is always equal to the amount of thymine (T) due to the base pairing rules, a principle proposed by scientists James Watson and Francis Crick. This principle, often referred to as Chargaff's rules, states that DNA from any cell of all organisms should have a 1:1 ratio of pyrimidine and purine bases. Therefore, if a DNA helix has 24% adenine, there would be 24% thymine present as well.
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Its the tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes.
Pedigree charts are used to trace the passing out of traits(characteristics) through generations.
In the given pedigree of 5 generations, the pattern of inheritance of genetic abnormality of polydactyly(extra fingers in hands and toes) is studied . The types of pattern of inheritance in traits over generations.
(a) Genotype of the parents for the trait Polydactyly in generation 1
Since each parent provide one allele of each trait to the offspring there are dominant and recessive genes on the basis of the expression of the character or trait. The genotype of the parents for thre trait of polydactyly in generation 1 is Recessive. Because both the parents do not have the abnormality and their offspring shows(expresses) the trait.
(b) In humans there are 46 chromosomes arranged as 23 sets of 2 chromosomes in a cell which is described as (2n). These somatic cells undergo Mitotic division to produce 2 identical daughter cell with 2n chromosomes and they are called diploid cells. When Meiosis takes place one cell is divide into 4 Haploid cells with 23 chromosomes each, ie, the single set of chromosomes represented by n. These Haploid cells are the gamates which transfer the genetic information from parents to offspring. The gamates are 2 types the sperm and egg cells , both are haploid and during fertilization a sperm cell fuses with eggcell to form a zygote with 2n (46) chromosomes.
To learn more about chromosomes check the link below:
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B. Thiamine pyrophosphate
C. Biotin
D. FAD
Answer: Option B.
Thiamine pyrophosphate.
Explanation:
Pyruvate dehydrogenase is an enzyme that catalyses the oxidative decarboxylation of pyruvate to acetyl coA , NADH and CO2. Pyruvate dehydrogenase uses NAD, biotin, FAD and lipoic acid.
Thiamine pyrophosphate is not a cofactor for pyruvate dehydrogenase . It is a cofactor in living systems. Thiamine pyrophosphate is a coenzyme that function in carbohydrates, Amino acids and lipids metabolism.
Biotin is not a cofactor in the reaction catalyzed by pyruvate dehydrogenase. NAD+, Thiamine pyrophosphate, and FAD do function as cofactors in this reaction.
The cofactors used in the reaction catalyzed by pyruvate dehydrogenase are NAD+, Thiamine pyrophosphate, and FAD. The compound that is not used as a cofactor in this reaction is Biotin. Biotin functions as a cofactor for carboxylase enzymes, and it is involved in fatty acid synthesis and gluconeogenesis but not in the process involving pyruvate dehydrogenase.
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b. False
Answer:
b.True
Explanation:
Yes it is true that chimps are closely related to human.
Chimps ,bonobos and gorillas have same genetic and biochemical function like humans.That is why they are also called human ancestor.Some of chimps could able to transfer their body according to the environment and slowly slowly become human,but some of them could not able to transfer their body and they are still chimps.
Answer:
This is because humans are causing species to go extinct at a faster rate than the normal rate.
Explanation:
It is documented that there are at least 2 million species on earth, and species have been naturally evolving and going extinct for billions of years. Some may say even if nothing is done there would still be extinction of this species which is true.
We care if human activity is driving other species extinct as we grow because humans are causing species to go extinct at a faster rate than the normal rate.
because India is closer to the ocean, and it has many rivers within it. North Africa does not have that much freshwater