The cell wall allows water, nutrients, ions, and certain gases to pass into and out of the cell. It acts as a protective barrier while regulating the movement of substances in and out of the cell.
The scientific name for the cell wall in plant cells is "cellulose." Cell walls are primarily composed of this polysaccharide, providing structural support and protection to the cell.
Examples of eukaryotic species include humans, dogs, cats, birds, trees, fungi, and algae. Eukaryotic organisms have cells with a membrane-bound nucleus and other organelles that contribute to their complex structure and function.
The prokaryotic kingdom, which includes bacteria and archaea, do not have a nucleus in their cells. Instead, their DNA is found in the cytoplasm in a region called the nucleoid.
A multicellular organism with cell walls but no chlorophyll would be classified as a fungi. Fungi are eukaryotic organisms that obtain nutrients through absorption, and their cell walls are made of chitin or other substances. They do not perform photosynthesis as they lack chlorophyll.
This description refers to the Kingdom Animalia. Animals are eukaryotic, multicellular organisms with specialized tissues that allow them to move and respond to their environment. They do not have cell walls like plants and fungi.
The start codon for mRNA is AUG, which codes for the amino acid methionine. It signals the ribosome to start translation and is crucial for initiating protein synthesis.
The scientific name of the protein titin is "connectin." It is the largest known protein and plays a key role in muscle contraction by providing structural support and elasticity to muscle fibers.
Biological classification of organisms is based on their similarities and differences in characteristics such as genetic makeup, anatomy, and behavior. Organisms are grouped into different categories, such as kingdom, phylum, class, order, family, genus, and species, based on these characteristics. The goal of classification is to organize and understand the diversity of life on Earth.
Archaebacteria are not classified in the same kingdom as eubacteria because they have fundamental genetic and biochemical differences, such as unique cell membrane components and gene sequences. These distinctions suggest that archaebacteria have evolved separately from eubacteria and are more closely related to eukaryotes in terms of evolutionary history.
Archaebacteria and Eubacteria are the two prokaryotic kingdoms in the current 6-kingdom system.
Aerobic cellular respiration occurs in the mitochondria of the cell. This process involves breaking down glucose to produce ATP, which is the main energy source for the cell.
No, bacteria do not have endoplasmic reticulum (ER) like eukaryotic cells. Bacteria lack membrane-bound organelles, including the ER, and instead have a simpler internal structure.
No, bacteria do not have smooth endoplasmic reticulum (ER). Smooth ER is a cell organelle found in eukaryotic cells, not in prokaryotic cells like bacteria.
NADH (Nicotinamide adenine dinucleotide) is an electron carrier that stores energy in the form of high-energy electrons and is involved in the process of oxidative phosphorylation to generate ATP.
Horizontal gene transfer is the process of genetic material being transferred between organisms that are not parent and offspring. This transfer can lead to changes in both the genotype (genetic makeup) and phenotype (observable characteristics) of the receiving organism.
No, amoebas do not have cell walls made of cellulose. They belong to a group of organisms known as protozoa, which generally lack cell walls or have flexible cell membranes. Cellulose cell walls are more commonly found in plants and some algae.
Yes, eukaryotes have a membrane-bound nucleus that houses their DNA. This nucleus separates the genetic material from the rest of the cell's activities, allowing for more complex regulation of gene expression.
Archaebacteria and monerans are both classifications of single-celled organisms, but monerans belong to the domain Bacteria while archaebacteria belong to the domain Archaea. Archaebacteria are known for living in extreme environments, while monerans are more commonly found in diverse habitats. Additionally, archaebacteria have unique cell membrane structures and genetic sequences that distinguish them from monerans.
An amino acid is not mRNA or tRNA. Amino acids are the building blocks of proteins, while mRNA carries the genetic information from DNA to the ribosome to be translated into a protein, and tRNA is responsible for bringing specific amino acids to the ribosome during protein synthesis.
Yes, eukaryotes have a true nucleus that contains their genetic material (DNA). The nucleus is membrane-bound and separates the genetic material from the rest of the cell's components.
Freckles are not determined by a single recessive gene. They are the result of a combination of genetics, particularly the presence of certain variations in the MC1R gene, and exposure to sunlight. The inheritance of freckles can vary depending on the specific genetic traits passed down from parents.
The highest, most inclusive category is typically the domain or overarching theme that encompasses all other categories within a classification system.
A scientist studying how populations evolve would most likely observe organisms with short generation times, high reproductive rates, and large population sizes, such as bacteria or fruit flies. These organisms allow researchers to observe multiple generations quickly and see how genetic changes occur over time within a population.