Biochemistry Questions and Answers

Biochemistry

DifferencesPassive transport doesn't require energy (ATP), active transport does require energy.Passive transport moves molecules WITH the concentration gradient (high to low), while active...

Latest answer posted December 5, 2008, 10:20 am (UTC)

2 educator answers

Biochemistry

At the very basic level, cells need to:Get nutrientsGet energyRemove Waste ProductsGrowReproduce (although this is more about keeping the species alive and not required for a cell's daily survival)...

Latest answer posted November 12, 2008, 8:36 am (UTC)

1 educator answer

Biochemistry

Similarities: Both of these are biogeochemical cycles,meaning that the chemicals spend a portion of the cycle in living things (hence the bio) and a portion in the nonliving environment (geo)....

Latest answer posted November 1, 2008, 10:57 am (UTC)

1 educator answer

Biochemistry

Prokaryotes are single celled organisms that do not contain membrane bound organelles or a nucleus. Eukaryotes have these organelles and cellular respiration takes place in the mitochondria to...

Latest answer posted October 2, 2012, 5:36 pm (UTC)

1 educator answer

Biochemistry

Neurons are specialized nerve cells that have a shape unique for the transmission of nerve impulses. Impulses have both an electrical and chemical component. On one end of the neuron are dendrites....

Latest answer posted August 30, 2012, 1:36 pm (UTC)

1 educator answer

Biochemistry

Cells must perform certain life functions to stay alive and have tiny organelles which carry out these activities. The nucleus is where the chromosomes are located. The DNA instructions are copied...

Latest answer posted January 21, 2012, 1:58 am (UTC)

1 educator answer

Biochemistry

Anaerobic glycolysis is the process of producing ATP in the absence of oxygen. It can take various forms and produce different types of waste products depending on the organism. For example when we...

Latest answer posted May 20, 2012, 11:19 pm (UTC)

1 educator answer

Biochemistry

Each cell can be more efficient. Without having these little organs within the cell, it could not carry out essential functions. Also, each cell carries such specific information to the make up of...

Latest answer posted August 20, 2009, 3:51 pm (UTC)

2 educator answers

Biochemistry

Glycolysis yields a total of 4 ATP, 2 pyruvates, and 2 NADH molecules. However, since the cell needs to make an initial investment of 2 ATP, it is generally considered that glycolysis only yields...

Latest answer posted October 31, 2008, 5:20 am (UTC)

1 educator answer

Biochemistry

1. Repair of tissue means cell division. This implies nucleic acids which have the instructions to produce new cells. 2. Carbohydrates such as glucose provide energy for life functions. 3. Amino...

Latest answer posted January 21, 2012, 1:47 am (UTC)

1 educator answer

Biochemistry

Protein molecules always contain Carbon, Oxygen, Hydrogen and Nitrogen. Occasionally, they will contain Sulphur - such as Cysteine, Methionine, and Cystine. A Phosphate (Phosphurus) is also used in...

Latest answer posted December 3, 2009, 8:59 am (UTC)

1 educator answer

Biochemistry

Carbon Dioxide gets into plant cells through small holes in the leaves called stomates (stomata). Water for the most part is absorbed into the roots (vascular plants) and then transported...

Latest answer posted November 15, 2008, 11:05 am (UTC)

2 educator answers

Biochemistry

There are a number of differences between the processes of photosynthesis and respiration. Photosynthesis takes place in green plants, cyanobacteria, and algae. In this process, carbon dioxide and...

Latest answer posted October 23, 2017, 4:54 pm (UTC)

3 educator answers

Biochemistry

The Golgi apparatus is the processing/packaging and shipping part of the cell (like the endoplasmic reticulum). It gets macromolecules ready and ships them out for use in the cell or secretion...

Latest answer posted October 26, 2010, 10:28 pm (UTC)

1 educator answer

Biochemistry

You can check out the following site, which includes a video clip with an "inside view" of a glucose molecule. Hope this helps.

Latest answer posted November 26, 2008, 1:20 am (UTC)

3 educator answers

Biochemistry

Biochemical reactions are chemical reactions that take place inside the cells of living beings. As we know, the cells inside a living body are composed of different kinds of molecules. During...

Latest answer posted February 9, 2016, 9:18 am (UTC)

1 educator answer

Biochemistry

Root hairs are thin-walled projections that extend out from the epidermis of a root and give the root more surface area to absorb water from the soil. These grow out the side of the root and are...

Latest answer posted January 17, 2012, 6:51 am (UTC)

1 educator answer

Biochemistry

Chemosynthesis is the process of converting carbon in the form of carbon dioxide or methane into organic molecules, without sunlight present. Instead, methane can be used, or hydrogen sulfide as...

Latest answer posted January 21, 2012, 2:22 am (UTC)

1 educator answer

Biochemistry

Mesosomes are areas in the cell membrane of prokaryotic (bacterial) cells that fold inward. They play a role in cellular respiration, the process that breaks down food to release energy. In...

Latest answer posted November 18, 2008, 9:38 am (UTC)

2 educator answers

Biochemistry

Chlorophyll is a green pigment that helps absorbing sunlight for photosynthesis. Its molecule is made of a magnesium atom in a porphyrin ring. There are two main types of chlorophyll, a and b and...

Latest answer posted May 28, 2012, 12:26 am (UTC)

1 educator answer

Biochemistry

Human protein Q6YH21, a collagen-like molecule associated with acetylcholinesterase in skeletal muscle, has a variant gene NM_080542, which encodes for the shortest protein in the human...

Latest answer posted February 10, 2009, 7:22 pm (UTC)

1 educator answer

Biochemistry

Blood plasma is a weak buffer. Remember that it is designed to buffer around pH 7.4 and therefore its capabilities are limited to weak acids or alkalis. For example, carbon dioxide dissolved in...

Latest answer posted June 5, 2009, 9:21 pm (UTC)

1 educator answer

Biochemistry

During aerobic respiration which takes place in the mitochondria of cells, glucose reacts with oxygen to form 36 molecules of adenosine triphosphate or A.T.P. as well as the wastes carbon dioxide...

Latest answer posted January 20, 2012, 12:29 pm (UTC)

1 educator answer

Biochemistry

Mitochondria are membrane-- bound organelles in the cytoplasm of eukaryotic cells. Their function is to supply cellular energy in the form of ATP to cells to use as chemical energy for life...

Latest answer posted June 26, 2012, 12:29 am (UTC)

1 educator answer

Biochemistry

DNA has made a copy of itself during the S phase of the cell cycle as explained by the previous answer. During prophase the DNA condenses into chromosomes. The sister chromatids are being held...

Latest answer posted November 24, 2009, 1:14 am (UTC)

2 educator answers

Biochemistry

The Sodium-Potassium Pump (Na-K Pump) was discovered in the 1950’s by Skou, who won the Nobel Prize in 1997. It is the mechanism used by the cell to preserve a high intracellular concentration of...

Latest answer posted October 27, 2011, 3:47 am (UTC)

1 educator answer

Biochemistry

Let's look at this one from the most basic perspective possible: Leaves make chlorophyll, which in turn produces cellulose. The way they make chlorophyll is through the process of photosynthesis --...

Latest answer posted October 20, 2008, 3:27 am (UTC)

1 educator answer

Biochemistry

Some organisms' internal salt levels mimic the external, thus they are able to survive in a salty environment, without water loss. Some have gills and renal or kidney organs, to help concentrate...

Latest answer posted June 26, 2012, 12:12 am (UTC)

1 educator answer

Biochemistry

It initiates protein synthesis by carrying coded information form the DNA to the sites of protein synthesis. So without it, cells would not be able to carry out protein synthesis.

Latest answer posted February 25, 2010, 3:44 pm (UTC)

1 educator answer

Biochemistry

Plants need three macro-nutrients for their growth. These are nitrogen, phosphorus and potassium. Urea is a source for nitrogen. Organic alternatives of urea include compost which is derived by...

Latest answer posted February 26, 2011, 3:06 pm (UTC)

1 educator answer

Biochemistry

Monomer is a term used to define a single unit or molecule that can react with another molecule to form a repeating fashion of large compounds known as polymers. Carbohydrates are generally defined...

Latest answer posted September 19, 2013, 8:09 am (UTC)

1 educator answer

Biochemistry

Restriction endonucleases can cut DNA at recognition sequences, called restriction sites. A restriction enzyme makes two incisions through the sugar phosphate backbone of DNA in each strand of the...

Latest answer posted February 20, 2012, 10:43 pm (UTC)

1 educator answer

Biochemistry

Enzyme activity can be regulated in many ways. Enzyme activity is dependent to a large extent on factors like pH, temperature, enzyme concentration, substrate concentration, salinity, etc. One way...

Latest answer posted February 26, 2011, 2:13 am (UTC)

1 educator answer

Biochemistry

Methanol poisoning can be treated with ethanol because of the ability of ethanol to act as a competitive inhibitor. The sites on the enzyme alcohol dehydrgenase that help in the breakdown of...

Latest answer posted February 24, 2011, 12:57 pm (UTC)

1 educator answer

Biochemistry

This technique was developed by Kary Mullis, in 1983 and allows for the amplification of a single or a few copies of DNA to as many as thousands or millions of copies. It is used for DNA cloning,...

Latest answer posted March 8, 2012, 7:21 am (UTC)

1 educator answer

Biochemistry

One way that the CO2 is measured is through ice core drilling. About 5 years ago I spent 8 weeks in the bush of Alaska working with the Athabascan. During the time there I had the opportunity to...

Latest answer posted February 2, 2009, 12:15 pm (UTC)

1 educator answer

Biochemistry

Before answering anything I have a brief disclaimer: I will be using pKa = 9.16 for the n-terminus of lysine and pKa = 10.67 for the epsilon amino in lysine. I am using these values because they...

Latest answer posted March 6, 2016, 5:08 am (UTC)

1 educator answer

Biochemistry

If your blood pH (I assume you mean that of plasma) goes into the ranges you suggest, that is below pH 7.0 or above pH 7.8, then, sadly, you are probably already dead. In severe cases of acidosis,...

Latest answer posted October 24, 2009, 4:21 am (UTC)

2 educator answers

Biochemistry

Respiration occurs in all living things--including plants. Respiration can be aerobic(with oxygen present) or anaerobic(without oxygen). It is a process by which chemical energy in food is released...

Latest answer posted July 10, 2012, 4:16 am (UTC)

1 educator answer

Biochemistry

There are three parts to cell respiration, each of which take place in different areas of the cell. The first stage, glycolysis, takes place in the cytosol (the liquid part of the cytoplasm)....

Latest answer posted October 29, 2008, 11:26 am (UTC)

1 educator answer

Biochemistry

The mitochondria is the powerhouse of the cell! In order to produce energy, cells need to break carbohydrates like glucose down into usable energy molecules called ATP (adenosine triphosphate). ATP...

Latest answer posted December 15, 2019, 7:50 pm (UTC)

1 educator answer

Biochemistry

Potassium (K+) and sodium (Na+), both ions of positive charge, or cations, both regulate the amount of water moving in and out of cells. Water moves across the cell membrane in either direction,...

Latest answer posted November 27, 2008, 12:11 pm (UTC)

1 educator answer

Biochemistry

Respiration is a molecular process that breaks down glucose and produces wastes products and energy. If the respiration is carried out in the presence of oxygen it is called aerobic respiration and...

Latest answer posted November 15, 2008, 10:43 am (UTC)

2 educator answers

Biochemistry

When glycogen stores are not available in the cells, fat is split into 3 fatty acids and 1 glycerol molecule. The fatty acids are an alternative energy source for cells. During starvation, the body...

Latest answer posted April 12, 2012, 2:52 am (UTC)

1 educator answer

Biochemistry

Respiration is a process that is used to produce energy in the cells of organisms, this can be plants as well as animals. Organic compounds are oxidized during respiration and this releases energy...

Latest answer posted October 16, 2011, 10:24 pm (UTC)

1 educator answer

Biochemistry

Antibodies are proteins that the body manufactures. They also go by the name immunoglobulins. In essence, these antibodies are vital in the fight against antigens. An antigen is an invading microbe...

Latest answer posted January 4, 2013, 8:03 pm (UTC)

1 educator answer

Biochemistry

Dopamine is a neutrotransmitter -- a kind of chemical that transmits information from neuron to neuron. When a person takes some kinds of addictive drugs, like cocaine or heroin, the drugs affect...

Latest answer posted November 14, 2009, 11:22 am (UTC)

1 educator answer

Biochemistry

All cells can be placed into one of two groups: Prokaryotic or Eukaryotic. Prokaryotes tend to be smaller and simpler in structure while Eukaryotes tend to be larger and more complex since they...

Latest answer posted November 17, 2008, 12:37 am (UTC)

1 educator answer

Biochemistry

Yes, but it isn't easy. By that I mean, the worn out red blood cells being carried by the lymph system will have some iron in them. Therefore, you could magnetize them without manipulating them on...

Latest answer posted February 18, 2009, 7:53 am (UTC)

1 educator answer

Biochemistry

From what I have been able to discover, the reason why alcoholics suffer from a lack of essential fatty acids is mainly because of their dietary choices. When a person consumes large amounts of...

Latest answer posted November 23, 2009, 2:17 am (UTC)

1 educator answer

Showing 1-50 of 65