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marishachu [46]
2 years ago
11

List how the bases of DNA are paired.​

Biology
1 answer:
erik [133]2 years ago
6 0

Answer:

DNA bases paired by, two strand are held together by hydrogen bonds between the bases

Explanation:

with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.

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If a solution is undergoing a reaction where CO2 is being created a product, what color is the phenol red-containing solution sh
Fantom [35]

Answer:

YELLOW

Explanation:

Phenol red is a biological indicator used to monitor changes in pH. The phenol red indicator changes color ranging from yellow to pink with respect to changes in pH. In an acidic pH i.e. <7, the phenol red changes to a YELLOW color while in an alkaline pH i.e. >7, the phenol red changes to a PINK pH.

The presence of carbon dioxide (CO2) increases the hydrogen ion concentration (H+) of a solution (lowering its pH or making it acidic).

Therefore, in a reaction where CO2 is created as a product, it means the CO2 content of that solution increases. Hence, the phenol red solution will be shifting towards the YELLOW color in response to a decreasee in pH (acidic).

4 0
3 years ago
When paleontologist refer to the "Big Five" to what are they referring?
GenaCL600 [577]
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6 0
2 years ago
PLEASE I NEED HELP. ANSWER ASAP PLZ
Alex_Xolod [135]

<u>Answer</u>: Bacteria through the nucleoid (number 5).

<u>Explanation</u>:

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Furthermore, they differ in their capacity to mutate and adapt to environmental changes. Bacteria have a simple internal structure that lacks any organelles and are very adept at adapting to environmental changes. Besides their capacity for high mutation rates, they are also capable of picking up genetic information from their environment through a process called <em>transformation</em>.

Through transofrmation, environmental DNA enter the living bacteria through its cell membrane. Double stranded DNA will have one strand dissolved through hydrolysis, whereas the second strand may recombine with the bacterial <em>chromosome (nucleoid)</em>. Thus, this new genetic material will become incorporated into the bacterium's genome.

7 0
3 years ago
Read 2 more answers
Arrange the sequence of events for the overall mitochondrial respiratory assembly in the correct order.
kotykmax [81]

Answer:

Option D, 4,2,1, 3

Explanation:

The mitochondrial respiratory chain (MRC) comprises of four membrane bound complexes and it involves the following steps

a) RC complexes (RCC) I and II reduces the RC’s equivalent where RCCI i.e receives electron from the NADH.  

b) These electrons are then transferred to the flavin mononucleotide factor and then passed on to the Fe-S embedded cluster .

c) These electron reduces the coenzyme Q  to ubiquinol  

d) With in the inner mitochondrial membrane (IMM), protons are trans located from IMM to the  intermembrane space (IMS)

e) RC complex II then transfer electron from succinate to the cofactor FAD

f) From FAD proton are transferred to the FeS cluster and on the other hand electron move from QH2 to the RC complex III

g) This RC complex III give its electrons to the cytochrome and they are further passes on to the RC complex IV

h) With four redox centers, the terminal RC complex translocate protein by using energy produced in electron transfer thereby converting oxygen into water.

Hence, the correct option is D

5 0
3 years ago
Why is biomass at the second trophic level in most ecosystems not as great as biomass at the first trophic
alexira [117]
Only about ten per cent of the biomass is transferred from each trophic level to the next. The remaining 90 per cent is used by the trophic level to complete life processes . Biomass can be lost between stages because not all of the matter eaten by an organism is digested.
7 0
2 years ago
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