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sertanlavr [38]
2 years ago
5

What is a disacharride?

Biology
1 answer:
irinina [24]2 years ago
4 0
2 monosaccharides (glucose monomers) combined
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The rapid depolarization phase of the action potentials of myocardial contractile cells is due to which ion(s)? The rapid depola
fgiga [73]

Answer:

Na+ only

Explanation:

Depolarisation of membrane refers to the change in the resting membrane potential of the membrane of a cell which is usually -70mv to a more positive value.

This value changes when the positive ions move inside the cell which increases the positive charge inside the cell.

In the myocardial cell, the sodium ions move inside the cell which changes the potential towards the more positive side as a result of which the signals for contraction arises.

Thus, Na+ only is correct.

5 0
1 year ago
Why is understanding the structure of DNA and how it is replicated important? List some technologies and practical applications
UNO [17]

The discovery of DNA, as well as understanding of its functioning and structure, may well be the most essential findings of the last century.  

The impact of the discovery of DNA on medical and scientific advancement has been huge, whether it involves the manufacturing and creation of drugs to cure the deadly diseases or to identify the genes, which stimulate several of the diseases.  

The understanding of DNA and its structural composition has led to the discovery of various technologies that helps in the fields like genetic testing, identifying viruses, crime investigation, production of genetically modified organisms, and various others.  


5 0
1 year ago
The model below shows the structure of a portion of a plasma membrane in an animal cell. The model shows the structure of a port
Romashka-Z-Leto [24]

Answer:

The amphipathic property of the phospholipids that constitute the membrane

Explanation:

It seems like a options-based answer so it would be better if they were included here but basically, each of those phospholipid molecules has two parts with antagonistic reactions towards water.

The head is polar or hydrophilic, wich means it can be sorrounded by water. The tail, is apolar or hydrophobic which means it is repelled by water.

The interior and exterior of the cell is contain water-based substances, that's why the heads of the phospholipids are oriented like that with the tails protected inside the membrane.

This double layer structure has a fundamental role in the fluid property of the cell membrane from which derive most of it's functions.

3 0
1 year ago
In a two-point test cross, 36 of the offspring were recombinant types. The remaining 64 offspring were parental types. How many
Maksim231197 [3]

Answer:

36

Explanation:

A two-point test-cross is a cross between an individual with a double heterozygote genotype and a homo-zygous recessive individual in order to determine the recombination frequency between two linked genes. In genetics, one map unit (m.u.) can be defined as the measure of the distance (i.e., genetic distance instead of physical distance) between genes for which one (1) product of meiosis in one hundred (100) is recombinant. In this case, 36 of the offspring have the recombinant phenotype, while the remaining 64 offspring are not recombinant, and therefore both genes are separated by 36 mu (64 + 36 = 100 >> 36 mu).

6 0
1 year ago
Which of the following statements regarding the endomembrane system is false? The endomembrane system is involved in the synthes
MArishka [77]

Answer:

Option (4).

Explanation:

Endomembrane system is may be defined as the sysytem that divides the cell into functional compartment or organelle. The organelle of endomembrane system are nuclear envelope, rough and smooth endoplasmic reticulum, golgi body, lysosomes, vesicle and plasma membrane.

Endomembrane system contains different membranes of cell organelle are suspended in the cytoplasm of the eukaryotic cell. Tge endomembrane system helps in synthesis, packaging and export of important proteins and molecules.

Thus, the correct answer is option (4).

7 0
2 years ago
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