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Delicious77 [7]
3 years ago
8

archaeans differ from eukaryotes and bacteria in that Choose one: A. archaeal membranes use ester links to bond glycerol to side

chains. B. archaeans have negatively supercoiled DNA. C. archaeal cells contain tRANs. D. archaeal membranes contain L-glycerol.
Biology
1 answer:
Nady [450]3 years ago
3 0

Answer:

D. archaeal membranes contain L-glycerol.

Explanation:

Archaea and eubacteria differ from each other with respect to the nature of membrane lipids. Lipids present in the membranes of the archaeans have the hydrocarbons derived from isoprene units. These hydrocarbons are branched and are attached to the glycerol with help of ether linkage. Ester linkages are present in eubacteria. The glycerol present in the archaeans is L- glycerol. Bacterial membranes have D-glycerol present in their lipids.

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An important protein in the activation of the alternative pathway of complement activation is
GalinKa [24]

Answer:

The correct answer is Cb3 protein.

Explanation:

The alternative pathway of complement is the immune system's natural defense system against any infectious agent. It is one of the 3 complement pathways that kills and any pathogen that enters our body.  

The pathway is activated when Cb3 protein binds directly to the microbe.

Cb3 protein is found in abundant quantity in our plasma. It is available in the free form.

5 0
3 years ago
Describe the following methods of genetic engineering: gel electrophoresis,
Sunny_sXe [5.5K]

Gel electrophoresis is a method of genetic analysis which involves seperating segments of DNA based on their size and charge.

It involves cutting DNA with various enzymes, then placing the DNA in an agarose gel. An electrical current is then run through the gel. Because DNA is a polar molecule the DNA segments will travel through the agarose cell as the current is applied. Larger fragments will travel shorter distances than shorter fragments. Two plates with 2 different DNA samples will be conducted and the orientation of the DNA strands will be used to make an analysis by comparing the 2 plates.

6 0
3 years ago
the thesis statement names supporting points in the same order that they appear as the paragraphs in the body section.
algol [13]

Answer:

True

Explanation:

A thesis statement provides the idea of what the thesis is going to be in about two sentences. The sequence of the statement is simply the introduction of the topic and then the position the author is taking in regards to the topic by providing the supporting points in a similar way as provided in the body. This way the thesis statement does name the supporting points in the same order that they appear as the paragraphs in the body section. Hence, this statement is true as the supporting argument is presented in the same sequence as it is presented in the body section.

7 0
3 years ago
Discuss some ways in which fruit seeds are dispersed.
ValentinkaMS [17]

The most common way of fruits to be spread is by birds.

Some birds eat the fruit, and when they dispose of its excrements, the seeds into that get spread.

Another way is with fruit near a waterfront and when the fruit falls into water they move away.

4 0
3 years ago
Arrange the organisms according to their position in the food web, starting with the autotrophs
lozanna [386]
1-3-2-4 here it is by birds u mean vulture right
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2 years ago
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