Biology and Chemistry Quiz

Which statistical test can be used to determine if observed results significantly differ from an expected 3:1 ratio?

• T-test

• Chi-squared

• Spearman’s rank correlation

• Pearson’s correlation coefficient

Which of the following is not true about the classification of polar bears and giant pandas?

• They each belong to the same order, Carnivora

• They each belong to the same family, Ursidae

• They each belong to a different class

• They both belong to the same kingdom

What is a key characteristic of a competitive enzyme inhibitor?

• Can bind irreversibly to the active site

• Has an identical structure to the substrate

• Effects can be overcome by adding more substrate

• Increases the rate of enzyme activity

Which statement about adult stem cells is incorrect?

• They are multipotent

• They can differentiate into various cell types

• They are totipotent

• They play a role in tissue repair

Which nitrogen cycle process typically occurs under anaerobic conditions?

• Nitrification

• Ammonification

• Denitrification

• Nitrogen fixation

Which statement correctly describes a tissue?

• A group of different cells performing multiple functions

• A group of similar cells performing a specific function

• A group of cells randomly organized

• A system composed of multiple organs working together

When two heterozygous plants (AaBb) are crossed, why might offspring genotypes appear in a 1:2:1 ratio?

• Crossing over

• Autosomal linkage

• Random assortment

• Mutations

Which ranking correctly orders microscope resolution from lowest to highest?

• Light microscope > Transmission electron microscope > Laser scanning confocal microscope

• Light microscope > Scanning electron microscope > Transmission electron microscope

• Scanning electron microscope > Light microscope > Transmission electron microscope

• Transmission electron microscope > Light microscope > Scanning electron microscope

In the lac operon, which structures contain nucleic acids?

• Only the operator and regulator gene

• Only the structural gene product

• Only the regulator gene and structural gene product

• All three components (operator, regulator gene, and structural gene product)

Homeobox genes control body plans in eukaryotes. Which statements are correct?

• They bind to transcription factors

• They contain a highly conserved sequence of 180 base pairs

• They regulate the expression of structural genes

• Both B and C