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miskamm [114]
2 years ago
15

The ______ is a region of an operon where regulatory proteins bind.

Biology
1 answer:
finlep [7]2 years ago
7 0
I believe <span>a </span>regulatory<span> repressor </span>protein<span> is normally bound to the operator. This prevents the transcription of the genes on the </span>operon<span>.</span>
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Please answer all :)
Serggg [28]

Answer:

i) Rusting occurs the least in tubes 2 and 3 because either of air and water which are necessary for rusting is absent in the two tubes respectively.

ii) Rusting occurs most in tube 1 because both air and water which are necessary for rusting are present.

Explanation:

Rusting is a chemical change which involves a redox reaction. During the process of rusting, metallic iron is oxidized to hydrated iron (iii) oxide by oxygen present in air.

For rusting to take place effectively, each of these three factors mist be available: metallic iron, oxygen and water.

In the figure above, the iron nails in the three tester tubes will rust to different extents based on the availability of the three factors.

In test tube 1, the iron nails will rust the most because all the three factors: metallic iron, oxygen present in air, and water are abundantly present.

In test tube 2, the iron nails will rust the least or not at all because boiling of water removes dissolved oxygen from water and the oil layer above the boiled water prevents entry of oxygen from air. Thus, the nail do not rust because one of the three factors for rusting to take place, in this instance, oxygen is absent.

In test tube 3, the iron nails rusts the least or not at all as well because moisture or water is absent. Calcium chloride, a drying agent removes all the moisture from inside the tube. Hence, even though air is present, rusting do not occur as there is no moisture or water present.

7 0
3 years ago
Upon completion of seeding a flower and a vegetable, research and identify the optimum propagation conditions, such as, water an
d1i1m1o1n [39]

Answer:

Needs optimum environmental conditions.

Explanation:

Seedling, a flower and a vegetable needs suitable conditions for growth and development. All of the three stages of plant life cycle requires optimum water, fertilizers and light intensity in order to grow and develop at full speed. Seeds need a specific temperature in order to germinate. Most seeds germinate when the soil temperature is between 68 and 86 Fahrenheit. In the same way the plant also needs specific temperature for bearing flowers. All the stages requires optimum water in the soil for absorption.

6 0
2 years ago
Problem #1
Arisa [49]

Answer:

9/16  Kinked tail, normal growth

3/16 Kinked tail, obese growth

3/16 normal tail, normal growth

1/16 normal tail, obese growth

Explanation:

Kinked tail (K) is dominant over normal tail (k) and normal growth (N) is dominant over obese growth (n). Two mice that are heterozygous for both traits (KkNn) are crossed:

        KkNn    x    KkNn

offspring:

<em>9/16</em><em> K_N_ - Kinked tail, normal growth</em>

<em>3/16</em><em> K_nn - Kinked tail, obese growth</em>

<em>3/16</em><em> kkN_ - normal tail, normal growth</em>

<em>1/16</em><em> kknn - normal tail, obese growth</em>

(See the attached image for the Punnet's square analysis)

3 0
3 years ago
Most sperm cells die in the vagina when entering the female's body because Most sperm cells die in the vagina when entering the
taurus [48]

Answer:

of the low pH of the vagina.

Explanation:

The pH of the vagina is maintained at highly acidic levels to prevent the germ buildup. The range of vaginal pH is around 3.8 to 4.5. The very low pH of the vagina creates a hostile environment for sperms and most of the sperms are killed as they enter the vagina due to the acidic pH.

Apart from supplementing the sperms with energy, cervical mucus serves to protect the sperms from the hostile conditions of the vagina. The cervical mucus has an alkaline pH at or near the ovulation to protect sperms from acidic pH of the vagina and to facilitate fertilization.

6 0
3 years ago
Pls help ASAP plss need help​
DanielleElmas [232]

Answer:

1- D,C,A,B,E- 2 - B,A,C,D- 3- C,D,B,A.

Explanation:

8 0
3 years ago
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