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A  RNA polymerase (yeast) is composed of several proteins. It unwinds DNA strands (violet) and builds RNA (red) out of the nucleotides uridine, adenosine, cytlidine and guanosine monophosphate.
Cell Membrane Phospholipid Structure,Phospholipid bilayer of the cell membrane,Lipid bilayer
3D cartoon and Gaussian surface models, chain id color scheme, PDB 7t3a, white background
Shiny artificial molecular structure in many colors. Horizontal composition, isolated on black background.
Dna structure on science background. 3d illustration
Inside protein molecule
Sperm cell with dna strand. 3d illustration
Endosomes - 3d rendered image of Endosomes are membrane-bound organelles. They are parts of endocytic membrane transport pathway.  Endomembrane system in cells. Bilayer Lipid Membrane. Abstract medical illustration. Microscopic view. Microbiologic research concept.
DNA methylation is the main epigenetic modfication of DNA. Methylation (white spot) can change the activity of a DNA segment. The DNA methyl transferase I (light blue) transfers a methyl group from S-adenosyl methionine  (red) mostly to cytosine bases of the human DNA. Source: PDB entry 3pt6
chromosome,Human genome concept
3D cartoon and Gaussian surface models, chain id color scheme, PDB 3omv, white background
anaplastic thyroid carcinoma with heterologous differentiation (leiomyosarcoma)
DNA mutation, a mutation is a change in a DNA sequence, mutations can result from DNA copying mistakes made during cell division.
DNA A-T Pair
Nucleosome structure. Structure of an oligonucleosome, showing the packaging of DNA in chromosomes. 3D illustration.
Bacteria pathogen - 3d rendered microbiology image. Illustrate of Lactobacillus Bulgaricus Bacteria, Microbacterium Tuberculosis Bacteria (MTB). Medical research, health-care concept. SEM (TEM) scanning view
Pathological phosphorylation (yellow) of Tau proteins (red-orange) leads to disintegration of microtubuli in the neuron axon an aggregation of the tau proteins. The transport of synaptic vesicles (orange-blue) is interrupted.
Squash preparation of  onion root tip cells stained to reveal chromosomes,  Bright field illumination, light microscopy.  This image was taken with the X40 objective lens.  Depth of focus is extremely low at this magnification.  Smaller apertures give greater depth of focus, but image quality deteriorates and resolution is greatly reduced.  The aperture in this image was optimised for contrast and resolution. Chromatic abberation is inevitable in light microscopy, but has been kept to a minimum in this image.
3D cartoon and Gaussian surface models, PDB 6vg8, white background
Myxoid liposarcoma.  Myxoid/round cell liposarcoma, or MRCLS, is one of several types of liposarcoma. Liposarcoma is a rare cancer that grows in the cells that store fat in the body. MRCLS usually grows in the arms and legs. These tumors grow slowly, and they can spread to other parts of the body
Biological protein and molecule, 3d rendering. 3D illustration.
A ball and stick + ribbons model of Human Growth Hormone, also known as Somatotropin.
Backgrounds of Bacteria and Mold under the microscope in Lab.
Chain of Amino Acid. Proteins consist of one or more chains of amino acids called polypeptides
orange: RNA primer; red: RNA template; light blue: proofreading riboexonuclease; mid blue: helicase; dark blue: RNA directed RNA polymerase; violet: non structural proteins (NSPs).
Photomicrograph of filamentous green algae showing characteristically well defined cells walls and nuclei. Live specimen. Wet mount, 40X objective, transmitted brightfield illumination.
3D cartoon and Gaussian surface models, chain id color scheme,  PDB 2iw2, white background
Epithelioid mesothelioma is a cancer subtype caused by asbestos. It is the most common mesothelioma cell type, accounting for 50% to 70% of cases.
DNA close-up, DNA Molecule Model, DNA Strands, DNA animation
Abs metaball structure SEM view - 3d rendered image on black background. Molecular metaball structure.  Flying liquid drops. Design elements. Medical research concept.
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