Question 1

Which of the following statements best describes the main difference between mitosis and meiosis in eukaryotic cells?

Accepted Answer

Mitosis produces two genetically identical diploid cells, while meiosis produces four genetically unique haploid cells.

Question 2

During which phase of mitosis do the sister chromatids separate and move toward opposite poles of the cell?

Accepted Answer

Anaphase

Question 3

Which of the following is a unique feature of meiosis I that does NOT occur in mitosis?

Accepted Answer

Formation of tetrads and crossing over between homologous chromosomes

Question 4

A scientist observes a eukaryotic microorganism with a single nucleus, no mitochondria, and a parabasal body. Which group does this organism most likely belong to?

Accepted Answer

Parabasala

Question 5

Which of the following best explains why red algae can survive in deeper waters compared to green algae?

Accepted Answer

Red algae contain the pigment phycoerythrin, which absorbs blue light prevalent in deeper water.

Question 6

Which of the following is TRUE regarding the nutrition of most fungi?

Accepted Answer

They are saprobes, absorbing nutrients from dead organic matter.

Question 7

A patient presents with cyclic fever and chills. Blood smear reveals multiple nuclei within a single cell, which later divides to release many uninucleate cells. Which process is most likely responsible for this observation?

Accepted Answer

Schizogony

Question 8

Which of the following is a distinguishing feature of the Division Zygomycota among fungi?

Accepted Answer

They are coenocytic (aseptate) molds and reproduce asexually via sporangiospores.

Question 9

Which of the following best describes the alternation of generations in multicellular algae?

Accepted Answer

A diploid individual produces haploid spores by meiosis, which develop into haploid individuals that produce gametes.

Question 10

Which of the following is a characteristic of water molds that distinguishes them from true fungi?

Accepted Answer

They have tubular cristae in their mitochondria and cell walls of cellulose.

Question 11

Which of the following is a function of contractile vacuoles in protozoa?

Accepted Answer

They pump excess water out of the cell to maintain osmotic balance.

Question 12

Which of the following is a medically significant consequence of dinoflagellate blooms in marine environments?

Accepted Answer

They produce neurotoxins that can cause paralytic shellfish poisoning in humans.

Question 13

Which of the following statements about lichens is CORRECT?

Accepted Answer

Lichens can be used as indicators of air pollution due to their sensitivity to environmental changes.

Question 14

Which of the following is a distinguishing feature of the Euglenozoa group?

Accepted Answer

They have flagella with a crystalline rod and disk-shaped mitochondrial cristae.

Question 15

Which of the following best describes the role of arthropod vectors in disease transmission?

Accepted Answer

They can transmit pathogens mechanically or serve as biological hosts for pathogen development.

Question 16

Which of the following is TRUE about the reproduction of yeast?

Accepted Answer

Yeasts can reproduce asexually by budding, sometimes forming pseudohyphae.

Question 17

Which of the following is a correct pairing of a protozoan group and a disease it causes?

Accepted Answer

Kinetoplastids – African sleeping sickness

Question 18

Which of the following is a feature of cellular slime molds that distinguishes them from plasmodial slime molds?

Accepted Answer

They exist as individual haploid myxamoebae that aggregate when food is scarce.

Question 19

Which of the following is a correct statement about the alternation of generations in algae?

Accepted Answer

Haploid individuals produce gametes that fuse to form a diploid zygote.

Characterizing and Classifying Eukaryotes: Microbiology Study Notes

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