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bekas [8.4K]
3 years ago
10

A scientist discovers that a soil bacterium he has been studying produces an antimicrobial that kills Gram negative bacteria. Sh

e isolates and purifies the antimicrobial compound, then chemically converts a chemical side chain to a hydroxyl group. When she tests the antimicrobial properties of this new version, she finds that this antimicrobial drug can now also kill Gram-positive bacteria. The new antimicrobial drug with broad-spectrum activity is considered to be:
Biology
1 answer:
nexus9112 [7]3 years ago
4 0

The question is incomplete as it does not have the options which are:

resistant

semisynthetic

synthetic

natural

Answer:

Semisynthetic

Explanation:

Antibiotics are the microbial compounds which are obtained from the micro-organisms which are found effective against the bacteria as they act by inhibiting the activity of the bacteria which ultimately kills the bacteria.

These antibiotics can also be distinguished based on their synthesis: natural, semi-synthetic and synthetic antibiotics.

The semi-synthetic antibiotics are the antibiotics which are obtained from the microbes but are modified artificially by making chemical changes to increase the effectiveness of the antibiotic and making the antibiotic as broad-spectrum bacteria.

Since the properties of the antibiotics provided in the question are similar to the semi-synthetic antibiotics, therefore, is considered semi-synthetic bacteria.

Thus, Semisynthetic  is correct.

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Ralph has type B blood and his wife Rachel has type A blood. They are very shocked to hear that their baby has type O blood, and
Cerrena [4.2K]

Answer:

1. The parents genotypes could have been BO and AO

2. wire-hair

Explanation:

There are four possible blood types which are type A, B, AB, O. blood group is the classification of blood based on the presence or the absence of inherited antigenic substances on the surface of the red blood cells. They have hereditary basis and also rely on a series of alternative genes sometimes used in solving dispute of parental heritage. With the four possible blood groups, there are six possible genotypes and these are:

Blood type               possible genotypes

Type A                         AA, AO

Type B                         BB, BO

Type AB                           AB

Type O                              OO

Thus, for parents with blood type B and A to give birth to a child with blood type O, it means their genotype could have been both BO and AO  for them to be able to produce a child with OO. a cross between these two could give rise to OO.

Question 2

Wire hair is dominant (S) to smooth (s), thus wire hair could be in the homozygous (SS) and heterozygous form (Ss) and the smooth hair can only be expressed in the homozygous recessive form (ss).

thus, in a cross between homozygous wire haired and smooth haired, we will have:

homozygous wire haired            homozygous smooth haired

P gen              SS                x               ss

F1 gen.                                Ss

phenotype:                     wire haired

8 0
3 years ago
Most mice living on the mainland of florida are brown, but the mice that live on the sand dunes of the barrier islands have whit
zysi [14]
<span>A trait that improves the fitness of its bearer, compared with individuals without the trait.</span>
7 0
3 years ago
What happens when the temperature of air decreases to the dew point or below the dew point
svet-max [94.6K]

When the temperature of the air becomes almost equal to the dew point the air becomes saturated and the relative humidity during this condition becomes 100%. If the temperature of the air decrease below the dew point the relative humidity will be 100% or exceeds 100%. This condition, when the temperature of the air decreases below the dew point is called supersaturation but most of the time the temperature of the air will be lower than the dew point.


4 0
2 years ago
Read 2 more answers
Which of the following statements is CORRECT?a. A hypothesis that does not generate a testable prediction is not useful.b. Commo
Fofino [41]

Answer:

a. A hypothesis that does not generate a testable prediction is not useful.

Explanation:

In the scientific method, we generate a hypothesis to explain a phenomenon. After this, it is necessary to create a method to test the hypothesis and make predictions. Moving forward, we test this methodology, generating results and reject or not reject the hypothesis. If the hypothesis can't be tested, the scientific method can't be applied.

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3 years ago
Recall that two hydrogen bonds bind A and T, but three hydrogen bonds bind G and C. Because the
tensa zangetsu [6.8K]

Answer:

C

Explanation:

7 0
3 years ago
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