November 29, 2018

The shape of a protein is most directly determined by the

  1.   amount of energy available for synthesis of the protein

  2.   kind and sequence of amino acids in the protein

  3.   type and number of DNA molecules in a cell

  4.   mistakes made when the DNA is copied

Answer and Explanation: 

Proteins are essential molecules in our body that compose most of the tissue. Proteins are made up from amino acids (molecules th...

November 12, 2018

We should first define all of the answer choices to be able to eliminate and come up with the correct answer. Chromosome functions to carry the genetic information and contains DNA molecules. DNA molecules are the basic building blocks of chromosomes that serve to carry the genetic information. Receptor is a molecule on the surface of cells that receives signals from the extracellular environment and leads to the change...

August 30, 2018

Our nervous system is divided into two categories: Autonomic and Somatic. Autonomic includes all the processes that occur automatically without our conscious thoughts such as breathing and heartbeat. Somatic, on the other hand, deals with conscious processes such as walking, running, raising your hand etc. Autonomic nervous system can be further divided into two categories: Sympathetic and Parasympathetic.

March 14, 2018

A cell nucleus is a membrane enclosed organelle found in eukaryotic cells. Nucleus contains all of the genetic information a cell has, in the form of DNA. It also contains various proteins. For example proteins, histones, are what DNA strands wrap around to form chromosomes. Furthermore, both DNA replication as well as transcription happens in the nucleus. Transcription is the process of creating RNA from DNA template....

February 28, 2018

Organic compounds are compounds that contain Carbon, C and contain Hydrogen, H as well. Let's look at our answer choices to try to eliminate some answers. Water, H2O does not contain carbon is therefo

February 24, 2018

For centuries humans have cleared native grasslands and forested areas to farm on as well as built houses and cities on. It came with benefits but also with a cost. Since the question is asking us about negative effect we can eliminate any answers that sound like benefits such as 2,3,4. Indeed by eliminating g

February 15, 2018

The virus that causes bird flu can attach to the cells of the lower part of the respiratory system in humans, but not to the cells of the upper part of the respiratory system. The most likely reason for this is that these two groups of cells have different

(1) DNA codes in their nuclei
(2) enzymes in their mitochondria
(3) amounts of water in their cytoplasm
(4) receptor molecules on their membranes 

Answer and Explanatio...

November 15, 2017

An energy-rich organic compound needed by organisms is

(1) water

(2) salt

(3) oxygen

(4) glucose 

Answer and Explanation:

In order for a compound to be organic it must contain a very important element: Carbon. This can eliminate choices 1 and 3 since the formula for water is H2O and oxygen is O2. A compound that is rich in energy is glucose, choice 4. The formula for glucose is C6H12O6. Animal bodies break down glucose in a...

October 24, 2017

n Long Island, several businesses use geothermal technology. This involves taking heat from within Earth and using it to heat buildings. One benefit of this technology is that it

(1) contributes to global warming
(2) reduces the ozone shield
(3) reduces dependence on fossil fuels

(4) decreases resources for many species 

Answer and Explanation:

The question asks for one benefit of the use of geothermal technology. Let's fi...

October 21, 2017

Which molecules are needed to cut and copy segments of DNA?

(1) reproductive hormones

(2) carbohydrates
(3) antibodies
(4) biological catalysts 

Answer and Explanation:

All of the answer choices are molecules in our body. Let's look at the definition of each choice one at a time. Reproductive hormones such as testosterone and estrogen function to regulate reproductive functions such as menstrual cycle, sperm production etc...

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