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e-lub [12.9K]
3 years ago
9

The operon model of the regulation of gene expression in bacteria was proposed by _____.

Biology
1 answer:
AlladinOne [14]3 years ago
6 0

Answer: D. Jacob and Monod

Explanation:

An operon is a region of DNA that consists of a single gene regulated by more than one promoter. An operon is a region of RNA that consists of the coding regions of more than one gene. RNA polymerase is the enzyme that binds to promoters and transcribes the coding regions of genes into RNA.

Jacques Monod was the first to demonstrate the preference for certain substrates over others through his studies of E. coli’s growth when cultured in the presence of two different substrates simultaneously.

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Which process in eukaryotic cells will proceed normally whether oxygen (o2) is present or absent?
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The correct answer is glycolysis. 

Glycolysis is an anaerobic process of splitting a molecule of glucose (6 carbons) to 2 molecules of pyruvate (3 carbons each). Glycolysis does not require the presence of oxygen and will still produce energy, albeit lower than aerobic metabolism. In the absence of oxygen, fermentation can occur wherein pyruvate is further converted into lactate.
3 0
3 years ago
Acording to erikson what is the first stage of psychosocial development?
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Answer:

The answer would be trust .vs. mistrust

Explanation:

This is the first stage

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7 0
3 years ago
Musculo que tiene las características tanto de musculo esquelético como de musculo liso. Se encuentra en el corazón y sus contra
max2010maxim [7]

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El músculo estriado cardiaco es una forma especializada de músculo estriado, conforma la pared del corazón, cuya contracción rítmica es involuntaria.

5 0
3 years ago
In garden peas, tallness (T) is dominant to shortness (t) and axial flowers (A) are dominant to terminal flowers (a). What are t
Delicious77 [7]

Answer:

The correct answer is explained below:

Explanation:

  • According to the question, heterozygous tall, heterozygous axillary plant has the following genotype, TtAa.
  • It produces the following gametes: TA, Ta, tA, ta.
  • The heterozygous tall, terminal plant has the following genotype: Ttaa
  • It produces the following gametes: Ta, ta.
  • Crossing them,

           TA                       Ta                     tA                        ta

Ta      TTAa                   TTaa                 TtAa                   Ttaa

     (Tall, Axillary)    (Tall, Terminal)    (Tall, Axillary)    (Tall, Terminal)

ta       TtAa                    Ttaa                  ttAa                   ttaa

     (Tall, Axillary)     (Tall, Terminal)   (Short, Axillary)  (Short, Terminal)

  • The genotypes of the offspring obtained are: TTAa, TTaa, TtAa, Ttaa, ttAa and ttaa respectively.
  • The phenotypes obtained are:
  1. Tall, Axillary = 3.
  2. Tall, Terminal = 3.
  3. Short, Axillary = 1.
  4. Short, Terminal = 1.
8 0
3 years ago
A) Describe the role of carbon in biological systems.
larisa [96]

Answer:

Key molecules that contain carbon include proteins, nucleic acids, carbohydrates and lipids. Carbon is an integral part of many biological processes, including reproduction, photosynthesis and respiration. We often assume that life in other parts of the universe, if we ever find it, will be carbon-based.

Explanation:

4 0
3 years ago
Read 2 more answers
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