GENERAL BIOLOGY 1

Which of the following best describes the final outcome of spermatogenesis compared to oogenesis?

• Both processes produce one functional haploid gamete.

• Spermatogenesis produces four sperm cells, while oogenesis produces one ovum.

• Spermatogenesis produces one sperm cell, while oogenesis produces four ova.

• Both spermatogenesis and oogenesis produce four viable haploid cells.

• Spermatogenesis results in polar body formation, while oogenesis does not.

During gametogenesis, both spermatogenesis and oogenesis undergo meiosis. Which of the following best explains how the final products differ between the two processes?

• Spermatogenesis produces four viable sperm cells, while oogenesis produces one ovum and polar bodies.

• Spermatogenesis and oogenesis both produce two viable gametes per cycle.

• Oogenesis produces four mature ova, while spermatogenesis produces one spermatozoon.

• Both processes produce an equal number of gametes but differ in chromosome number.

• Oogenesis produces diploid ova, while spermatogenesis produces haploid sperm.

A scientist is comparing spermatogenesis and oogenesis in the laboratory. She observes that to non-functional cells. Which process is she most likely studying, and what are those non-functional cells?

• Spermatogenesis; spermatids

• Oogenesis; polar bodies

• Oogenesis; spermatogonia

• Spermatogenesis; primary spermatocytes

• Oogenesis; secondary spermatocytes

A student claims that both spermatogenesis and oogenesis produce four viable gametes at the end of meiosis. Which evaluation best explains why this statement is incorrect?

• The student is correct because both processes undergo meiosis I and meiosis II.

• The student is incorrect because spermatogenesis produces four spermatozoa, while oogenesis produces only one ovum and polar bodies that degenerate.

• The student is correct because both produce haploid cells that can be fertilized.

• The student is incorrect because spermatogenesis occurs in ovaries while oogenesis occurs in testes.

• The student is incorrect because spermatogenesis forms oogonia, while oogenesis forms spermatogonia.

How do glycolipids and glycoproteins contribute to the function of the plasma membrane?

• They prevent any substance from entering or leaving the cell.

• They store energy for cell metabolism.

• They assist in cell recognition and communication between cells.

• They make the plasma membrane impermeable to water.

• They serve as the main components of the cytoskeleton.

If a cell loses its ability to recognize neighboring cells, which structural component of the plasma membrane is most likely malfunctioning, and why?

• Phospholipids, because they control the selective permeability of the membrane.

• Cholesterol, because it regulates membrane fluidity and rigidity.

• Glycolipids, because their carbohydrate chains enable cell recognition.

• Integral proteins, because they provide structural support.

• Peripheral proteins, because they maintain cytoskeleton attachment.

If you were tasked to design a synthetic cell for medical drug delivery, which plasma membrane component would you enhance to ensure that the artificial cell can recognize target human cells?

• Increase phospholipid bilayer thickness for stronger barrier

• Add more glycolipids for better cell recognition and targeting

• Remove cholesterol to make the membrane more flexible

• Use only structural proteins for stability and shape

• Increase peripheral proteins to help transport drugs

A student argues that cholesterol is an essential component in all plasma membranes to prevent stiffness. How should this statement be evaluated?

• The student is correct because cholesterol maintains fluidity in all types of cells, including plant cells.

• The student is incorrect because cholesterol prevents stiffness only in animal cell membranes, not in plant cells.

• The student is correct because cholesterol is needed for both phospholipids and glycolipids.

• The student is incorrect because cholesterol only strengthens membranes and does not affect fluidity.

• The student is correct because cholesterol is universally present in prokaryotic and eukaryotic cells.

How do oxygen and glucose enter cells?

• O₂ needs a channel; glucose passes directly

• O₂ = simple diffusion; glucose = facilitated diffusion

• Both need energy

• Both pass freely

• Neither can cross

Why can oxygen diffuse freely, but glucose cannot?

• Oxygen is gas, glucose is solid

• Oxygen is small & nonpolar; glucose is large & polar

• Both need energy to enter

• Oxygen always needs proteins

• Glucose is smaller than oxygen