Biology Practice Test #2

Which are the correct mRNA bases, complementary to the following DNA strand “ TGCA”:

ACGU

Translation takes place:

in the cell cytoplasm

Which of the following describes heterozygous individuals?

They have two different alleles for the same gene

Which of the following correctly lists the hierarchic system of classification from most inclusive to least inclusive?

Kingdom, Phylum, Class, Order, Family, Genus, Species

A repeatable procedure of gathering data to support or refute a hypothesis is known as

conducting an experiment

DNA and RNA are subunits of which type of biologic molecule?

Nucleic acids

Which of the following is not true about water?

The polarity of water’s bonds allows for covalent bonding between molecules.

Which biologic molecule would you recommend a patient limit if they want to avoid having cardiovascular problems?

Saturated fats

Which type of protein acts to catalyze different reactions or processes?

Enzymes

What are the three types of lipids?

Fatty acids, phospholipids, and steroids

In a cell, reactions take place in a series of steps called ____________?

metabolic pathways

What function do cholesterol molecules serve within the cell membrane?

They stabilize the flexible bilayer structure to prevent breakage.

Although animal cells lack cell walls, they do have an elaborate system of glycoproteins that provide support to the outside of the cell called the:

extracellular matrix

If an animal cell is left in an unknown solution overnight, and the next day the cell bursts, it can be assumed that the unknown solution is:

hypotonic

Which organelle is responsible for storing, modifying and sending out products of the endoplasmic reticulum, such as proteins?

Golgi apparatus

Which cell organelle functions in the detoxification and metabolism of multiple molecules?

Smooth endoplasmic reticulum

A flagellum is a whip-like appendage found on the surface of some cells. What is their primary purpose?

Movement of the cell

Which type of cell lacks a defined nucleus?

Prokaryotic cell

Which step in cellular respiration takes place in the mitochondria of the cell and produces two ATP molecules, six carbon dioxide molecules, and six NADH molecules for every molecule of glucose?

The Krebs cycle

Which of the following statements about catabolic pathways that lead to cellular respiration is correct?

Cellular respiration produces more energy than fermentation.

Solar energy is converted to chemical energy during which stage of photosynthesis?

Light reactions

What is the process by which bacterial cells reproduce called?

Binary fission

During which phase of cell reproduction does the cell’s nuclear envelope begin to disappear?

Prometaphase

Crossing over occurs during which phase of meiosis?

Prophase I

36 chromosomes undergo meiosis. How many chromosomes will be in each gamete?

18