MCB 150 POST LEC 3

Which of these are hollow rods that shape and support the cell?

microtubules

Which of these organelles carries out cellular respiration?

mitochondrion

Ribosomal subunits are manufactured by the _____.

nucleolus

Which of these organelles produces H2O2 as a by-product?

peroxisome

Drag the terms on the left to the appropriate blanks in the sentences on the right. Terms can be used once, more than once, or not at all.

1. In eukaryotic flagella, the fibers that slide past one another due to the activity of dynein proteins are microtubules 2. Many cell organelles, most notably the nucleus, are anchored by intermediate filaments which are assembled from a diverse class of proteins 3. Centrosomes are sites where protein dimers assemble into microtubules 4. The extension of pseudopodia in amoeba is due to the regulated assembly and destruction of microfilaments 5. The only cytoskeletal fibers not associated with intracellular movement or whole cell locomotion are the intermediate filaments 6. During muscle contractions, myosin motor proteins move across tracks of microfilaments

Which of these structures stores, modifies, and packages products?

A, The Golgi apparatus modifies, stores, and packages products of the ER.

Drag the labels on the left onto the diagram of the animal cell to correctly identify the function performed by each cellular structure.

A. Synthesize Lipids B. Assemble Ribosomes C. Defines Cell Shape D. Produces Secretory Proteins E. Modifies and Sorts Proteins F. Digests Proteins G. Generates ATP

is/are identical in structure to centrioles.

Basal bodies

Choose the letter that indicates the organelle that contains most of a cell's DNA.

C, The nucleus contains most of a cell's DNA.

Which of these provides the cell with structural support?

D, Microfilaments are a component of the cytoskeleton.

Which of these is the double membrane that encloses the nucleus?

E, This is the nuclear envelope.

Which feature is shared by all monosaccharides?

In their linear forms, they all contain a carbonyl and several hydroxyl functional groups.

_____ are the sites of protein synthesis.

Ribosomes

How do the α and β forms of glucose differ?

Their ring structures differ in the location of a hydroxyl group.

The _____ is composed of DNA and protein.

chromatin

The _____ is a selective barrier, regulating the passage of material into and out of the cell.

plasma membrane

Drag each cell structure to the appropriate bin.

prokaryotic only: nucleoid eukaryotic only: lysosome, mitochondria, nucleolus Both: ribosomes, plasma membrane, flagella

Which of these organelles manufactures proteins bound for secretion out of the cell?

rough endoplasmic reticulum

Where is calcium stored?

smooth endoplasmic reticulum

What are three ways monosaccharides differ from one another?

the number of carbon atoms they contain the location of their carbonyl group the orientations of their hydroxyl groups

What is the difference between an aldose sugar and a ketose sugar?

the position of the carbonyl group