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Which statement/s is/are correct about salivary glands?

Saliva contains lysozyme with antibacterial activity.

Saliva dissolves substances that stimulate the taste buds.

Serous cells form the secretory component of IgA.

The secretion of serous cells contains proteins.

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Sublingual gland

contains serous demilune of Gianuzzi.

has the longest main duct of all the major salivary glands.

is mostly serous.

is a simple tubular.

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has serous glandulae oesophageales in the submucosa.

has tunica muscularis externa that is composed of smooth muscle throughout the esophagus.

is covered mostly with adventitia, only in the abdominal cavity is serosa.

has a wall composed of 4 basic layers: mucosa, submucosa, muscle and adventitia (or serosa).

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contains numerous lymphoid nodules.

is a part of the cecum and shares with it the histological structure of the large intestine.

the individual taenia of the outer longitudinal muscle layer fuse here.

its mucosa is lined with simple columnar epithelium with numerous goblet cells.

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Human nuclear DNA

is organized into heterochromatin (microscopically dense) and euchromatin (light in the optical microscope).

is divided into 23 pairs of chromosomes in somatic cells; they are visible during mitosis.

binds to basic histone proteins in somatic cells, with which it forms chromatin.

has a positive charge due to the large number of phosphate groups; therefore, it binds electrostatically to negatively charged histones.

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Endoplasmic reticulum

exists in granular (rough, with attached ribosomes) and agranular (smooth) forms.

consists of a dense network of cytoskeletal proteins.

is the site of synthesis of new tRNA molecules.

is essential for the production of most proteins exported from the cell to its surrounding area.

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are heterodimers of α and β tubulin molecules with the ability to grow and shorten.

are a branched triple helix of tightly cross-linked molecules.

are part of the division spindle, cilia, and flagella.

are called neurotubules in neurons and are involved in axonal transport.

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its enzymes modify newly formed proteins, e.g. by sulphation, glycosylation, phosphorylation.

is functionally and structurally related to the endoplasmic reticulum.

is the site of digestion of the contents taken up by endocytosis.

is an organelle involved in the formation of transport vesicles.

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are double-membrane organelles that form proteins in the cell nucleus and nucleolus.

are composed of two subunits.

bind to mRNA in large numbers to form polysomes.

translate a sequence of mRNA bases into a sequence of tRNAs to form a polypeptide chain.

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convert the chemical energy of nutrients into energy-rich ATP molecules.

have two membranes, the inner of which is composed of cristae and tubules and contains enzymes of oxidative phosphorylation.

have their own eukaryotic-type DNA arranged in four chromosomes.

contain enzymes of the Krebs cycle and fatty acid beta-oxidation in the inner mitochondrial matrix.

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