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amm1812
1 year ago
6

An ameba is a single-celled organism. It uses its cell membrane to obtain food from its environment, digests the food with the h

elp of organelles called lysosomes, and uses other organelles to process the digested food. From this, we can best infer that
(1) all single-celled organisms have lysosomes to digest food
(2) amebas are capable of digesting any type of food molecule
(3) single-celled organisms are as complex as multicellular organisms
(4) structures in amebas have functions similar to organs in multicellular organisms
Biology
1 answer:
makvit [3.9K]1 year ago
3 0

Answer:

According to me answer no 4  is correct.

Explanation:

single cell amoebas can perform all life functions capture the food, digestion, respiration, excretion, and reproduction also. These all are similar to multicellular animals.

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A particular triplet of bases in the template strand of DNA is 5' AGT 3'. The corresponding codon for the mRNA transcribed is __
earnstyle [38]

Answer:

The correct answer is 3' UCA 5'

Explanation:

The rule of pairing of base-pair says that A and T base pairs with each other with two hydrogen bonds and G and C base pairs with each other with three hydrogen bonds in DNA. In the case of RNA Uracil comes at the place of thymine that means uracil replaces thymine.

Therefore according to this base-pairing rule the corresponding codon of mRNA transcribes from DNA codon 5' AGT 3' will be 3' UCA 5' as U came in place of A nucleotide, C comes in place of G nucleotide, and A comes in place of T nucleotide.  

Therefore the correct answer is 3' UCA 5'.

4 0
2 years ago
If the length of the absolute refractory period in cardiac muscle cells was the same as it was for skeletal muscle ________.
melomori [17]
Tetanic contractions might happen, which would lead to the heart to stop pumping 
7 0
1 year ago
Describe how temperatures above 35 C most likely affect the structure and function of the starch synthase in the particular stra
arlik [135]

Answer:

- It is very likely that temperatures above 35°C will change the structural configuration of the enzyme, denaturing it and preventing it from performing its function.

- According to the information, the most probable consequences for this rice crop is that its starch content will be lower, compared to crops grown at optimal temperatures.

Explanation:

<u>The full question includes this statement</u>:

<em>A rice grain is a fruit that encloses a seed. Most of the dry mass of a rice grain is starch. In rice plants,  starch is produced by hydrolyzing sucrose and then linking the released glucose molecules together into  starch . The optimal temperature range for starch synthase activity in a particular strain of rice  is 27°C - 30°C. The optimal temperature range for sucrose synthase in the strain is 30°C - 35°C.</em>

One of the factors affecting enzyme activity is temperature, according to which an enzyme can make a reaction faster, slower or inhibit the activity of that enzyme.

For a grain of rice to acquire its starch content, the activity of two enzymes is required, sucrose synthase - to obtain glucose from sucrose - and starch synthase, to polymerize glucose into starch (see image).

<h3>In this case, how temperatures above 35°C most likely affect the structure and function of the starch synthase?</h3>

The temperature of 35°C is far above the optimum temperature required for the enzyme to act, so it is possible that a change in the structure of the enzyme will occur or that it will be denatured, preventing the starch synthase from performing its function. One consequence of this is a lower starch synthesis.

<h3>When the average temperature in the growing season is 33°C, what can be predicted about the consequences on the starch content in mature rice grains?</h3>

A temperature of 33°C is outside the range of starch synthase activity -even though it is optimal for sucrose synthase- which would decrease starch synthesis and, because of this, the rice grains in this crop would have less starch content.

Learn more:

Relationship between the reaction of velocity of an enzyme and temperature brainly.com/question/14198802

6 0
1 year ago
The small, peglike projections of the tongue's surface are called ________.
ad-work [718]
<span>The small, peglike projections of the tongue's surface are called: Papilae
In human's tounge papilae is the organ that make us able to taste everything that we put in our mouth. It consist of five different regions, and each separate regions are capable to give response for 5 unique taste: sweet, sour, bitter, salty, and umami</span>
4 0
2 years ago
A land-dwelling organism, A, and an aquatic single-celled organism, B, are represented below.
Sergio039 [100]

Using the image that represents the land-dwelling organism and an aquatic single celled organism. The statement that best explains how A and B are able to survive in their environments is…


Answer: A) The organelles in B perform similar functions to the organ systems in A.


Please see image attached to better understand how we arrived to the conclusion.


<span>I hope it helps, Regards. </span>

8 0
1 year ago
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