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umka21 [38]
3 years ago
9

(1 point)

Biology
1 answer:
Yakvenalex [24]3 years ago
8 0

Answer:

The correct answer is Tryptophan binds with the repressor allowing it to attach to the operator site,blocking the RNA polymerase.

Explanation:

Tryptophan operon contain 3 regulatory genes and 5 structural genes.The structural genes encodes enzymes for tryptophan biosynthesis.

  The expression of tryptophan operon is tightly regulated by the the cellular level of amino acid tryptophan.

 When the tryptophan level is high at that time the tryptophan bind with the repressor protein encoded by regulatory tryp R gene and then the repressor tryptophan complex binds to the operator region thus preventing the RNA polymerase enzyme to exert its action.

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Assume that the mother's genotype is AZ/az, and the father's genotype is Az/aZ, and the recombination rate is 10%. What are the
attashe74 [19]

Answer:

0.45 from mom and 0.05 from dad.

Explanation:

The recombinant progeny might occur due to the crossing over at the time of meiosis in which the exchange of chromosomes occur in the homologous chromosomes of non sister chromatids.

The progeny receives half of their chromosome from the mother and half from the father. The mother 50% AZ and 50% az chromosomes respectively. The 10% recombination has occured due to which the mother chromosomes is reduce upto 45%. The recombinant  10% will be aZ and Az and has 5% frequency. Mom has the ability of az chromosomes is 0.45 %. The father has the genotype 50% Az and 50% aZ. The 10% recombination has occured due to which the father chromosomes is reduce upto 45%. The recombinant will be az and AZ with 5% frequency. So, father has az with 0.05 % probability.

Thus, the answer is 0.45 from mom and 0.05 from dad.

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The __ regulates body temperature, thirst, appetite, and water balance.
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The correct answer is B. Hypothalamus.

Explanation

The hypothalamus is a part of the brain that is located below the thalamus, it is an area of the brain where several and very important homeostatic regulatory functions of the organism are integrated. Its main function is to link the autonomic nervous system with the endocrine system. Other functions are to control body temperature, control thirst and urine production (water balance in the body), control food intake, control uterine contractions and milk ejection in mammals, the coordination of the nervous system Autonomous, which affects smooth muscle and cardiac activity, influences behavior and expression of emotions. Therefore, the correct answer is B. Hypothalamus

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Explain the difference in meaning between the words microbe and pathogen.
Ivanshal [37]

Answer:

Different diseases are caused by different types of micro-organisms. Microbes that cause disease are called pathogens. It is important to remember that: A pathogen is a micro-organism that has the potential to cause disease.

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hope this helps helps you a lot

my handwriting is bad sorry for that bhai

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