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3 years ago

Sodium has the atomic number 11

1 answer:

3 0

Sodium atom has 11 electrons
The Na+ ion has a + charge because the atom has lost 1 electron
Therefore number of electrons = 10

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Which are the three main types of lipids

maxonik [38]

Answer:

The three main types of lipids are - triglycerides, diglycerides, and steroids.

Explanation:

Lipids are organic compounds that are fatty acids or their derivatives. Lipids are insoluble in water but soluble in organic solvents (alcohol, ether). The three common lipids are triglycerides, diglycerides, and steroids.

An ester derived from glycerol and three fatty acids is a triglyceride. These are the main component of body fat in the vertebrates as well as the vegetable fat.

A Glyceride consisting of 2 fatty acid chains bonded to a glycerol molecule covalently through ester linkages is a diglyceride.

Biologically active organic compounds with four rings arranged in a specific molecular configuration are steroids.

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3 years ago

Read 2 more answers

. The separation of DNA strands moves outward from the origin via the action of ___________, which untwists the double helix and

Licemer1 [7]

Answer:

<h2>Helicase, topoisomerase ii /gyrase, single strand binding proteins.</h2>

Explanation:

DNA replication is the process in which DNA is replicated with the help of various enzymes and proteins..

Helicase is the enzyme which unwind the DNA strands, After unwinding, topoisomerase removes these twists. Single strand binding proteins stabilize the single strands of DNA during replication.

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3 years ago

b. In 1979, the estimated elephant population was 1.3 million and in 2007 it was 640,000. By approximately what percentage did t

saveliy_v [14]

Answer:

The initial amount, 1.3 million = 1,300,000 is the 100%.

now, 640,000 is a given percentage (lower than 100%) of that.

How we can find it?

suppose that 640,000 represents an x%.

Then we have that the quotient between the actual quantities and the percentages must be the same

(640,000/1,300,000) = x%/100%

x% = (640,000/1,300,000)*100% = 49.23%

Then the percentage declined is:

100% - 49.23% = 50.77%

The other question can not be answered with the given information.

4 0

3 years ago

RNA synthesis is always 5' to 3' because: A. the unwinding of the double-stranded DNA can only move one direction B. the structu

avanturin [10]

Answer:

The correct answer is option E. "nucleotides can only be added to an available 3'-OH group on the transcript terminus".

Explanation:

RNA synthesis is catalyzed by an enzyme called RNA polymerase. RNA polymerase always catalyze the synthesis of new RNA from 5' to 3' because nucleotides can only be added to an available 3'-OH group on the transcript terminus. This has been confirmed in labeling experiments with γ-32P substrates which establish the presence of a triphosphate moiety in transcripts with either pppG or pppA.

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3 years ago

Read 2 more answers

Which RNA molecule is involved in translating a short sequence of RNA into an amino acid, acting like a molecular Rosetta stone?

oee [108]

Given what we know about the translation process, we can confirm that the RNA in question that aids in the process of translating a short sequence of RNA into an amino acid is mRNA.

mRNA is referred to as messenger RNA. This RNA molecule acts as just that, a messenger carrying the necessary code to create amino acids and therefore, proteins. This messenger binds itself to the ribosomes of a cell, which are in charge of reading the code, one codon at a time, and chaining together the corresponding amino acids.

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brainly.com/question/15878647?referrer=searchResults

3 0

2 years ago