1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
SVEN [57.7K]
3 years ago
14

Further microscopic analysis of negatively stained specimens reveals a colorless ring around each of the spherical cells against

a dark background. This clearing indicates that the pathogen possesses which structure(s):________. a. endospores. b. a capsule. c. nucleoid. d. pili.
Biology
1 answer:
Tanya [424]3 years ago
7 0

Answer:

b. a capsule

Explanation:

The capsule is mainly made up of polysaccharides and surrounds many bacteria. Capsule staining includes mixing of the bacterial cells with dye and spread out in a thin film on a slide. After air-drying, the cells appear as light-colored structures present in a relatively dark blue-black background. This occurs since the dye particles cannot penetrate either the cell or its capsule. Therefore, the given slide with a colorless ring around the cells in a dark background represents the presence of a capsule around the observed cells.

You might be interested in
Which animal could a Siamese cat mate with to produce offspring
Law Incorporation [45]
Siamese cats most of the time mate with Aegean cats, and the reason why is because Aegean cats are also domesticated and most of the times can easily be  found.
8 0
3 years ago
Read 2 more answers
While studying the function of a G protein-coupled receptor you develop a modified GTP molecule that has the same binding capabi
laila [671]

<u>Answer:</u>

Effects Include:

Activates secondary messengers such as cAMP which further activates number of hormones like

  • ADH: production of this hormone causes kidneys to retain more water inside body.
  • GHRH: release growth factors and stimulates growth of organism.
  • ACTH: produces fight or flight responses i.e rise in heart beat, rise in Blood pressure etc
  • TSH: Stimulate the synthesis of Thyroid hormone and enhances the metabolism of body. In rare cases causes Goiter without the deficiency of Iodine.
  • LH: Stimulate follicle maturation and formation of ovules in women.
  • Calcitonin: Decreases blood calcium level by deposition calcium in bones. This effect weakens the muscles.
  • Glucagon: Stimulates glycogen breakdown from liver and muscles and many more effects.

<u>Explanation:</u>

Background Knowledge:

GPCR (G Protien coupled receptors) are present inside plasma membrane in huge amount. As name suggest that these receptors are coupled with G proteins during their inactive state present inside of the cell. During their Inactive state these G proteins are bounded with GDP molecule.

Upon receiving signal molecules from outside of cell alters the shape of GPCR. These receptors also triggers change in G Protein, as a result of this GTP get attached with them. This protein further activates reaction cascades inside of the cell.

What happen if GTP cannot be hydrolyzed to GDP + Pi?

If GTP cannot hydrolyzed in to GDP + Pi than, it cannot be able to dissociate from G proteins. Cascade system doesn't stop and produces many effects on body.

Effects Include:

Activates secondary messengers such as cAMP which further activates number of hormones like

  • ADH: production of this hormone causes kidneys to retain more water inside body.
  • GHRH: release growth factors and stimulates growth of organism.
  • ACTH: produces fight or flight responses i.e rise in heart beat, rise in Blood pressure etc
  • TSH: Stimulate the synthesis of Thyroid hormone and enhances the metabolism of body. In rare cases causes Goiter without the deficiency of Iodine.
  • LH: Stimulate follicle maturation and formation of ovules in women.
  • Calcitonin: Decreases blood calcium level by deposition calcium in bones. This effect weakens the muscles.
  • Glucagon: Stimulates glycogen breakdown from liver and muscles and many more effects.
7 0
3 years ago
Most of the world's population lives in:
My name is Ann [436]
I believe the correct answer is North America. .

please vote my Answer brainliest. thanks!
4 0
3 years ago
Read 2 more answers
Which of the following mutations would most likely be identified as a chromosomal translocation
snow_lady [41]

Answer: Structural chromosomal mutation

Explanation: In translocation, a small piece of chromosome is detached from one chromosome and is attached to another non-homologous chromosome. Translocation can be simple, shift or reciprocal.

Simple translocation involves single break in the chromosome. The broken piece gets attached to the end of the non-homologous chromosome.

In Shift translocation, the broken segment of one chromosome gets inserted interstitially in a non-homologous chromosome.

Segment from one chromosome is exchanged with a segment from another non-homologous chromosome simultaneously in Reciprocal translocation.

6 0
2 years ago
How can an artificial reef be considered favorable effect of building a plane?
erica [24]

Answer:

in material wise for use

7 0
2 years ago
Other questions:
  • Which of he following is a coast of urbanization
    9·1 answer
  • The plasma membrane is responsible for which set of functions listed below?
    15·1 answer
  • This type of tissue allows for rapid communication between various parts of the body
    7·1 answer
  • Which of the following would have direct effects on the resources available to a population?
    10·1 answer
  • Which term is defined as a place in the mantle where magma rises, often melting the crust above
    10·1 answer
  • Orchids are a recently evolved plant that have a novel feature known as aerial roots. What is the most likely function of an orc
    6·2 answers
  • Explain how a carbon atom in a CO2 molecule in the air can become part of a cellulose molecule in a plant
    8·1 answer
  • What is produced in the process of photosynthesis?
    11·2 answers
  • In what phase of mitosis do the chromosomes line up along the center of the cell?
    12·1 answer
  • Name three methods of disrupting cells before fractionation
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!