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kotykmax [81]
3 years ago
5

The letter A indicates: _____. 1. Globules containing eight subunits each. 2. A filamentary structure forms two turns around eac

h globule. 3. Letter A marks the filamentary structure between the globules. 4. Letter B marks one of the globules. 5. Letter C marks one subunit of the globule.
Biology
1 answer:
alex41 [277]3 years ago
6 0
<h2>a DNA double helix</h2>

Explanation:

  • Deoxyribonucleic acid is made up of two chains. A double helical structure is formed when two chains coil around each other.This double helical structure carry genetic information for the growth, reproduction, development and functioning of an organism.
  • The nucleic acid such as DNA and RNA are one of the major types of macromolecules which are necessary for all life forms.
  • The nucleotide is made up of one of four nitrogen containing nucleobases such as Adenine, Guanine, Cytosine and Thymine, Deoxyribose sugar and a Phosphate group.

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The Lac Operon is a set of genes that controls the production of lactase the enzyme that digests
Romashka [77]

Answer:

The lactose present prevents the production of lactase

Explanation:

This question is describing a set of genes in bacteria called LAC OPERON. Lac operon controls the production of lactase, which is the enzyme that digests lactose. However, this gene can be regulated at the transcription level i.e caused to be transcribed or not depending on certain factors.

According to the question, lac operon, which regulates the production of enzymes will be transcribed and subsequently translated i.e. turned on when there is a substrate (lactose) that the produced enzyme will work on. However, when there is no need of the lactase enzyme or there is absence of lactose (substrate), the lac operon gene is turned off.

Note that, the statement that "The presence of lactose prevents the production of lactase" is not correct.

4 0
2 years ago
Non Examples of asexual and sexual reproduction
posledela
A Chameleon and a Camel
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3 years ago
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Hydrogenotrophy is Choose one: A. the oxidation of water during photosynthesis to liberate electrons, protons, and oxygen gas. B
NikAS [45]

Answer:the answer will be b

Explanation:

3 0
3 years ago
5. If an organism has 5 pairs of chromosomes and no crossing over occurs, how many different
Tom [10]

Answer:

In spite of the fact that he didn't have any acquaintance with it, Walther Flemming really noticed spermatozoa going through meiosis in 1882, yet he confused this cycle with mitosis. Regardless, Flemming saw that, dissimilar to during standard cell division, chromosomes happened two by two during spermatozoan improvement. This perception, continued in 1902 by Sutton's careful estimation of chromosomes in grasshopper sperm cell improvement, given conclusive insights that cell division in gametes was not simply customary mitosis. Sutton showed that the quantity of chromosomes was decreased in spermatozoan cell division, a cycle alluded to as reductive division. Because of this cycle, every gamete that Sutton noticed had one-a large portion of the hereditary data of the first cell.

Explanation:

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3 years ago
What is the primary advantage of noneugenol periodontal surgical dressing over periodontal surgical dressing that does contain e
daser333 [38]

Some people may develop redness and burning discomfort in the vicinity of the bandage if they are allergic to eugenol.

  • In order to lower the danger of surgery site infection and bleeding, speed up wound healing, and lessen patients' pain and discomfort, periodontal dressings were devised.
  • The ability of eugenol-based dressings to numb pain and make sites less sensitive made them popular in the past, especially after gingivectomy.
  • Based on its antibacterial qualities, zinc oxide-eugenol dressings appeared to prevent or delay bacterial development. However, it was discovered that eugenol irritated oral mucosal tissues, caused allergic reactions, and caused tissue necrosis, especially in bone, which slowed the healing process.
  • Thus, noneugenol periodontal surgical dressing are preferred.

learn more about eugenol here: brainly.com/question/17092785

#SPJ4

6 0
2 years ago
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