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3 years ago

"ucture and properties of Matter

Biology

1 answer:

lapo4ka [179]3 years ago

4 0

Answer:

Covalent bonds form when two atoms share valence electrons,

while Van der Waals forces cause an attraction between nonpolar

molecules

Explanation:

A covalent bond is said to be formed when two atoms of the same or different elements share electrons. In an ordinary covalent bond, each bonding atom contributes one valence electron while in a dative covalent bond only one of the bonding atoms provides the shared pair of electrons.

Van Der Waals forces is the major intermolecular interaction between non polar compounds. Van Der Waals forces " are caused by correlations in the fluctuating polarizations of nearby particles"(Wikipedia).

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Change TCA-GAT from DNA into mRNA

gizmo_the_mogwai [7]

Answer:

AGU-CUA

Explanation:

An mRNA sequence is made using a DNA sequence as a template. The sequence is dictated by complementary base pairing.

DNA uses the bases A, T, C and G. A is complementary to T and G is complementary to C.

RNA uses the bases A, U, C and G. A is complementary to U and G is complementary to C.

When transcribing DNA to RNA:

C is paired with G
G is paired with C
A is paired with U
T is paired with A

Therefore, TCA-GAT is transcribed to AGU-CUA

8 0

3 years ago

GPCRs are ___________ after activation.

Lerok [7]

The G-protein couples receptors are among the most diverse group of the membrane protein receptors. The GPCRs attaches a wide variety of the signalling molecules. They interact with the G proteins which are present in the membrane. Conformational changes occur in the GPCR, when the external signalling molecules attaches to it. The GPCR is desensitized after it becomes activated.

Hence, the answer is 'Option D - desensitized'.

3 0

3 years ago

comparative profile for covid-19 cases from china and north america: clinical symptoms, comorbidities and disease biomarkers

Hatshy [7]

Different people are affected by COVID-19 in various ways. The symptoms experienced by infected individuals have ranged widely, from little discomfort to serious sickness.

The susceptibility to and prognosis of severe acute respiratory syndrome caused by coronavirus 2 or coronavirus disease 2019 (COVID-19) have been found to vary greatly amongst individuals and populations.
Intervention in public health must take into account these variations and how they affect susceptibility to infection and the severity of disease.
The distinctions between the COVID-19 case profiles from China and North America may be due to regional variations in host, environmental, and healthcare-related factors.
These inter-population variances, together with intra-population variability, highlight the need to identify how health inequities and inequalities affect the public health response to COVID-19 and can help with preparing for the epidemic's resurgence.

Learn more about the COVID-19 with the help of the given link:

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6 0

2 years ago

Suppose a male organism has a diploid chromosome number of 6. These chromosomes could be represented as A,a, B, b, C, and c wher

KatRina [158]

Answer:

A. The haploid set of n is ABC

B. ABC, ABc, AbC, aBC, abc, abC, aBc, Abc.

Explanation:

A diploid cell is a cell that comprises of two complete sets of chromosomes. This is double the haploid chromosome number. Each pair of chromosomes in a diploid cell is noted to be a homologous chromosome set. A homologous chromosome pair consists of one chromosome donated from one parent and one from the other parent. This number is represented as 2n. It varies in different organisms. A diploid cell replicates via mitosis. It preserves its diploid chromosome number by making an identical copy of its chromosomes and distributing its DNA in an equal manner between two daughter cells.

Haploid refers to a cell that contains a single set of chromosomes. Gametes are made up of half the chromosomes contained in normal diploid cells of the body, these are also known as somatic cells. Haploid gametes are produced during meiosis. Meiosis is a type of cell division that reduces the number of chromosomes in a parent diploid cell by half.

Therefore,

Karyotype of this organism is designated as AaBbCc.

AaBbCc is the diploid set (2n).

Hence ABC or abc are the haploid set (n).

B. The eight different combinations of these chromosomes that could possibly be produced by spermatogenesis in this male are:

ABC, ABc, AbC, aBC, abc, abC, aBc, Abc.

7 0

4 years ago

Mountain ranges form along ___ plate boundaries via orogenic processes.

Tamiku [17]

1. Mountain ranges form along <u>convergent </u>plate boundaries via orogenic processes.

<h3>What is tectonic plates?</h3>

The formation of mountains is caused by tectonic plates. A mountain is formed when two tectonic plates move towards each other and collide, resulting in altitudes that can take years to reach but that eventually create massive mountains through what are known as convergent plate borders.

2. Rift valleys formed through the stretching of divergent plates occurs through a divergent boundary process.

When tectonic plates separate, they can leave low ground areas like the Rift Valley, which are produced by diverging continental plate borders. They can be found on the surface of the Earth or at the bottom of the ocean, and they are formed by the expansion of the seabed.

3. The formation of mountain ranges occurs as a result of <u>orogeny</u>.

This process occurs when one continental plate dips and the other rises, allowing mountain ranges to form. Orogeny is the name given to this process.

4. Scientists observe an extremely long <u>deformation </u>area in a continental plate during an orogenic process..

Scientists use tectonic plate simulations to study this deformation in order to better predict natural disasters such as earthquakes.

5. <u>Epeirogenic </u>process causes vertical plate motion along tectonic plates.

The vertical movement of a continent that generates soft arcs or rises parts uniformly is known as epeirogeny.

For more information regarding tectonic plates, visit:

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3 0

2 years ago