Cells


What element has 47 protons in its nucleus October 23

Elemental silver is part of the transitional metals group in the periodic table and is situated next to palladium and cadmium at 46 and 48 protons, respectively. Silver has anywhere from 58 to 64 neutrons and 47 electrons. The atomic weight of silver

How does a zygote form October 20

How does a zygote form
There are two types of nuclear cell division: mitosis and meiosis. During the process of mitosis, DNA molecules condense and form long strands of chromosomes. The molecules replicate themsel ...

How does cytokinesis occur in most animal cells October 13

Cytokinesis is an essential part of the cell division process because it ensures that the nucleus is divided evenly between the daughter and parent cell. In animal cells, cytokinesis begins as a ring of protein filaments that develops under the plasm

What is a non-living thing composed of cells October 10

Living things are composed of the same chemical elements as non-living things, but all living organisms have cells in common. When a living thing is composed of more than one cell, it is referred to as multicellular. Cells arranged together in a cert

What does a centriole do September 15

What does a centriole do
Centrioles are small sets of microtubules that are set up in a particular pattern. Nine different microtubule groups exist, and when two centrioles appear adjacent to one another, they sit a ...

What are types of zooplankton September 15

Zooplankton are categorized by size and/or stage of development. The types of zooplankton according to size are picoplankton, which measure less than 2 micrometers; nanoplankton, which measure between 2 and 20 micrometers; microplankton, which measur

How many neutrons does boron have September 15

Boron was discovered in 1808 by chemists Gay-Lussac and Thenard in France and independently by English chemist Davy. Both groups used the same method of isolating boron through a combination of boric acid and potassium. Although boron is not found in

What are the four main functions of the plasma membrane September 14

What are the four main functions of the plasma membrane
The plasma membrane contains channel, carrier, receptor, enzymatic and cell recognition proteins that all contribute to the membrane's functions. The channel proteins form small openings whe ...

What is a unicellular type of fungi September 14

Yeasts in the ascomycota phylum, such as brewer's yeast, or S. cerevisiae, have proven to be useful in research as a model eukaryotic organism. As a unicellular organism, yeast cells develop into colonies quickly, often doubling in population size in

Where is the cell wall located September 13

Bacteria, algae, fungi and plants have cell walls surrounding their cells while animal and protist cells do not. Cell walls are generally made up of carbohydrates. They give shape to cells, causing plants to be able to stand up straight. These walls

What is the importance of osmosis September 13

Infoplease notes that cells of plants and animals have outer coverings called cell membranes, which serve as a barrier that separates the cells from their environment. This semipermeable membrane controls the substances that enter and leave the cell.

Where in the cell does transcription take place September 13

At the start of transcription, the DNA molecule, normally in a double helix form, unzips. RNA polymerase binds to the DNA template at a region called the promoter. The enzyme travels down the DNA strand and adds nucleotide bases to the RNA strand. On

What does crossing over mean in meiosis September 13

Each chromatid from a nonsister chromatid pair comes from a different parent. While they carry the same genes, the genes may be in different forms. Crossing over is so precise that no genes or parts of genes are lost in the process. The genes that br

What is the correct sequence of the cell cycle September 13

The cell cycle is the process that cells use to grow and replace themselves. This cycle creates two identical daughter cells. The G1, S and G2 phases are preparatory phases for mitosis. They are often grouped together into a phase known as interphase

What is the purpose of microvilli September 13

As BBC further explains, the food is first broken down by enzymes in the stomach, and the partially digested food is then pushed through to the small intestine. The lining of the small intestine is covered with microvilli, which are best described as

What is an analogy for the cell membrane September 13

The cell membrane is supposed to be permeated by a few different materials. If the chemical makeup of a material is not what the membrane wants to allow through, then the membrane holds strong and refuses entry. This is just like a drawbridge or gate

Why can cells only grow to a certain size September 11

The larger a cell gets, the smaller its surface area to volume ratio becomes. This is important because nutrients entering the surface of the cell must increase as the volume of cytoplasm increases. However, the increase in surface area in the growin
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