The two strands of a DNA double helix are held together by:

A. ionic bonds.

B. hydrogen bonds.

C. nonpolar covalent bonds.

D. polar covalent bonds.

E. hydrophobic exclusions.

Which of the following codes for a specific protein? Question 1 options: DNA gene enzyme chromosome amino acids

How do microorganisms effect the soil?

1. Consider two clear species as defined by the Biological Species Concept: a. Fertile hybrids can be quite common if they are selected against intensively b. Fertile hybrids can be continuously present but relatively uncommon c.

Once an enzyme has converted substrates into products, the active site reverts back to its original form. True or false?

Which hypothesis most likely explains the results at 60°C and 70°C? O A. The substrate has been used up because of the high temperature, O B. The enzyme has changed shape because of the high temperature. O C.

A. What are 4 examples of macronutrients B. What are 2 examples of micronutrients

The science of studying genomic fragments from microbial communities, allowing researchers to study genes from a collection of multiple species, is called: pharmacogenomics transcriptomics metagenomics proteomics

Which behavior can reduce pollution that occurs due to the use of coal?

How are fingerprints discovered at crimes?

Do plants such as ferns need to break down glucose to obtain usable energy? A. No, they absorb the sun's energy directly. B. No, they absorb energy from the soil. C. Yes, they make glucose and break it down to produce ATP. D.