BS Bachelor of Science: Intro to Life Sciences 3

Question 1

Which domain of life includes organisms with membrane-bound nuclei and complex internal organelles?

Accepted Answer

Eukarya

Answer

Domain Eukarya encompasses all organisms whose cells have a true membrane-bound nucleus.

Question 2

The scientific name of an organism consists of its genus and species following which naming convention?

Accepted Answer

Binomial nomenclature

Answer

Binomial nomenclature, developed by Linnaeus, uses a two-part Latinized name (genus + species).

Question 3

Which type of natural selection favors individuals at both extremes of a phenotypic range over intermediate phenotypes?

Accepted Answer

Disruptive selection

Answer

Disruptive selection increases the frequency of extreme phenotypes, potentially leading to speciation.

Question 4

The Krebs cycle (citric acid cycle) takes place in which part of the mitochondria?

Accepted Answer

Matrix

Answer

The Krebs cycle enzymes are located in the mitochondrial matrix, the fluid-filled interior.

Question 5

Which macromolecule provides the structural framework for cell membranes?

Accepted Answer

Phospholipids

Answer

Phospholipids form the bilayer that constitutes the basic structural framework of all cell membranes.

BS - Bachelor of Science Practice Test