BCM MCQs part 2 (starting from quiz 5 question 6)

Glucose has the formula C6H12O6 and contains an aldehyde functional group. Which statement is CORRECT?

Glucose is a disaccharide.

Lucose is a breakdown product of glyceraldehyde.

Glucose is an aldose sugar.

Glucose is a pentose sugar

Glucose is a ketose sugar.

Compared to lard and butter, olive oil and cod liver oil have: Select one:

Which statement about lipids is correct?

All lipids are made from glycerol and fatty acids

All lipids do not dissolve well in water.

All lipids have low energy content.

All lipids are acidic when mixed with water.

All lipids contain nitrogen.

Which statement about lipids and phopholipids is incorrect?

A cell could not exist without phospholipids.

Lipids are varied in form and function

Lipids include waxes, fats and steroids.

A phospholipid has three fatty acids attached to glycerol

At the surface of a cell, phospholipids are arranged in a bilayer.

Maltose is a disaccharide consisting of two glucose residues linked by an alpha 1,4 linkage. Which statement is CORRECT?

"Alpha" gives no information about the position of the OH group on the sugar ring.

Two glucose residues are linked by a peptide bond.

Two glucose residues are in linear forms in maltose.

Two glucose residues are linked by an ester linkage.

Two glucose residues are linked by a glycosidic bond.

The nuclear pore complex is involved in:

The nucleolus is:

Found in the cytoplasm.

The largest organelle in the cell.

Responsible for metabolism.

None of the options given.

Responsible for ribosomal RNA synthesis.

A pentapeptide is a:

Peptide with 10 amino acid residues.

Peptide with 25 amino acid residues.

Peptide with 5 amino acid residues.

Soft drink.

Peptide with 15 amino acid residues.

Secondary structures of proteins describe the:

Number of amino acid residues in a peptide.

Globular structure of a protein.

Conformation of the peptide backbone.

Sequence of amino acid residues.

Properties of the functional side chains of a polypeptide.

Which of the following cytoskeleton proteins has a right-handed double helix structure with 13 protein subunits per turn?

Water passes quickly through cell membranes because:

Water movement is tied to ATP hydrolysis.

It is a small. polar, charged molecule.

It moves through hydrophobic channels.

The bilayer is hydrophilic.

It moves through aquaporins in the membrane.

Which of the following best describes the cross-section structure of the microtubules in the basal body of a cilia or flagella?

The process of capturing energy by breaking down complex molecules into simpler molecules is called:

Which of the following provides "walk ways" for organelles to follow in cytoplasmic streaming that can be observed in plant cells?

Which of the following is true of the evolution of cell membranes?

Cell membranes cannot evolve if the membrane proteins do not.

The evolution of cell membranes is driven by the evolution of glycoproteins and glycolipids.

All components of membranes evolve in response to natural selection.

An individual organism selects its preferred type of cell membrane for particular functions.

Cell membranes have stopped evolving now that they are fluid mosaics.

Which of the following types of movement DOES NOT involve interactions between dynein or kinesin motor proteins and microtubules?

Mammalian blood contains the equivalent of 0.15M NaCl. Seawater contains the equivalent of 0.45M NaCl. What will happen if red blood cells are transferred to seawater?

The blood cells will take up water, swell and eventually burst.

The blood cells will expend ATP for active transport of NaCl into the cytoplasm.

NaCl will passively diffuse into the red blood cells.

Water will leave the cells, causing them to shrivel and collapse.

NaCl will be exported from the red blood cells by facilitated diffusion.

Which of the following best describes the cross-section structure of the microtubules in a cilia or flagella shaft (not the basal body)?

Which of the following cytoskeleton proteins has pairs of globular heads with intertwined tails that form the thick bipolar filaments in muscle sarcomeres?

Which of the following statements is NOT CORRECT?

The thickness of a plasma membrane is 2.5 nm.

Golgi apparatus consists of a series of flattened sacs (cisternae) which are not physically connected to each other.

Organelles provide intracellular compartments for specific cellular processes to take place.

Smooth endoplasmic reticulum is studded with ribosomes

The nucleolus forms ribosomal RNA.

Which of the following statements is NOT CORRECT?

The thickness of a plasma membrane is 2.5 nm.

Golgi apparatus consists of a series of flattened sacs (cisternae) which are not physically connected to each other.

Organelles provide intracellular compartments for specific cellular processes to take place.

Smooth endoplasmic reticulum is studded with ribosomes.

The nucleolus forms ribosomal RNA.

Which of the following is unlikely to be found in a phagocytic vesicle in a macrophage?

The simple order of steps for protein synthesis is:

Before protein synthesis can occur:

Amino acids must be free and not bound to tRNA.

TRNA must be charged by binding to their appropriate amino acid.

Amino acids must be bound to each other by phosphodiester bonds.

Introns must be inactivated.

None of the options shown are correct.

A biologist ground up some plant leaf cells and then centrifuged the mixture to fractionate the organelles. Organelles in one of the heavier fractions could produce ATP in the light, whereas organelles in the lighter fraction could produce ATP in the dark. The heavier and lighter fractions are most likely to contain, respectively:

In a plant cell, DNA may be found:

Only in the nucleus and mitochondria

Only in the nucleus

Only in the nucleus and chloroplasts

In the nucleus, mitochondria, chloroplasts and peroxisomes.

In the nucleus, mitochondria and chloroplasts

The evolution of eukaryotic cells most likely involved:

Endosymbiosis of an aerobic bacterium in a larger host cell - the endosymbiont evolved into mitochondria.

An endosymbiotic fungal cell evolved into the nucleus.

Acquisition of an endomembrane system, and subsequent evolution of mitochondria from a portion of the golgi.

None of the options given.

Anaerobic archaea taking up residence inside a larger bacterial host cell to escape toxic oxygen - the anaerobic bacterium evolved into chloroplasts

All of the following serve an important role in determining or maintaining the structure of plant cells. Which of the following are distinct from the others in their composition?

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BCM MCQs part 2 (starting from quiz 5 question 6)

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