Question

In: Biology

1)Cell walls are rigid and resist expansion, which allows the pressure to build inside a cell...

1)Cell walls are rigid and resist expansion, which allows the pressure to build inside a cell when it absorbs water. The force exerted by pressing water against the cell wall is called [BLANK1], which is a key feature that allows plants to stand upright.

2)Prokaryotes concentrate DNA in a discrete region of the cell interior known as the BLANK . They often contain additional small circular molecules of DNA known as BLANK that carry a small number of genes that are commonly transferred between bacteria through thread-like hollow structures known as BLANK . Genes for antibiotic resistance are transferred, which accounts for the quick spread of antibiotic resistance among bacterial populations.

3)The [1BLANK] is a rigid structure that surrounds the plasma membrane of some organisms to help maintain the cell shape and volume and also functions in support and protection.

4)

The shape of the phospholipid structure is determined by the bulkiness of the head group relative to that of the hydrophobic tail. Lipids with bulky heads and a single hydrophobic fatty acid tail forms spherical structures called what?

	A.	Bilayer
	B.	Micelles
	C.	Liposome
	D.	Lysosome

5)The BLANK and BLANK are both semi-autonomous organelles that grow and multiply independently and contain their own genomes.

6)Protein sorting is a process by which proteins end up where they need to be to perform their function. Proteins produced by free ribosomes are often directed to their proper cellular compartments by means of particular amino acids called signal sequences.

Match the type of signal sequence used in the making of proteins that direct them to the correct cellular destination.

- A. B. C.	No signal sequence
- A. B. C.	Amino-terminal sequence
- A. B. C.	Internal signal sequence

A.	Proteins directed to remain in the cytoplasm
B.	Proteins directed to the mitochondria or chloroplast
C.	Proteins directed to the nucleus

Expert Solution

Ans-1-Cell walls are rigid and resist expansion, which allows the pressure to build inside a cell when it absorbs water. The force exerted by pressing water against the cell wall is called turgor pressure, which is a key feature that allows plants to stand upright.

Turgor pressure - water molecule exert against the cell wall is called turgor pressure, which allows them to keep their pressure.

Ans-2-Prokaryotes concentrate ................of DNA known as plasmid,that carry a small number of genes that are commonly transferred between bacteria through thread-like hollow structures known as pilli. Genes for antibiotic resistance are transferred, which accounts for the quick spread of antibiotic resistance among bacterial populations.

Ans-3-the cell wall is a rigid structure........

Ans-4-lipid bilayer- phospholipids are arranged in bilayer forms the basic structure.

Ans-5-mitochondria and chloroplast are both semi-autonomous organelles,contain their own genomes and bio synthetic machinery.

gladiator answered 1 year ago

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