4.4 The Nucleus and Ribosomes
Chromatin
Threadlike material that coils into chromosomes just before cell division occurs; contains DNA, protein, and some RNA.
when was Golgi Apparatus discovered and by whom? when?
Camillo Golgi, who discovered it in 1898
Digestive vacuoles digest..?
nutrients
The matrix of the mitochondria is concentrated with
ATP production occurs
Enzymes that break down carbohydrates.
cristae.
Are short cylinders with a 9 + 0 pattern of microtubule triplets.
Centrioles
The nucleolus is a dark region of chromatin inside the nucleus; it is where the...?
The site where ribosomal RNA (rRNA) joins with proteins to form ribosomes.
Smooth ER is continuous with rough ER but lacks..?
ribosomes
are membrane-bounded vesicles that contain specific enzymes are called..?
Microbodies
who is capable of producing photosynthesis?
Only plants, algae, and certain bacteria
The actin filament consists of two chains of globular actin monomers twisted to form a
helix
The nucleus has a diameter of
about 5 μm.
White blood cells that engulf bacteria use what to digest the bacteria?
lysosomes
The central vacuole of a plant cell...?
maintains turgor pressure within the cell, stores
nutrients and wastes, and degrades organelles as the cell ages
Photosynthesis is represented by the equation:
solar energy + carbon dioxide + water → carbohydrate + oxygen
What are myosin and how does it help Actin filaments
Proteins that can attach, detach, and reattach farther along an actin filament.
For example, myosin combines with and splits ATP, binding to actin and changing configuration to pull the actin filament forward.
are the site of protein synthesis in the cell
Ribosomes
White blood cells that engulf bacteria use..?
lysosomes to digest the bacteria.
Vacuoles generally store substances such as..?
Plant vacuoles contain water, sugars,
salts, pigments, and toxic molecules.
Other types of plastids, which differ in color, form, and function from chloroplasts
chromoplasts and leucoplasts.
Cilia and flagella grow by
he addition of tubulin dimers to their tips.
he nucleus is separated from the cytoplasm by
the nuclear envelope
Tay-Sachs disease is a lysosomal storage disease where...
The enzyme that is missing
digests a fatty substance that helps insulate nerve cells. Therefore, the fatty substance accumulates and
causes nerve cells to die.
Hydrogen peroxide (H2O2) is broken down into?....by?
water and oxygen by catalase
The inner membrane surrounds the ___and is convoluted to form ____
matrix, cristae.
Are short, usually numerous hairlike projections that can move in an undulating fashion
Cilia