BIOL 2710 Exam 1 Ch. Quiz

chapter quiz questions for exam 1

from smallest to largest, the levels of organization in the body are:

molecules, organelles, tissues, organs, systems, organism.

The smallest living units of structure and function in the body are:

cells

The process of obtaining and using energy is called:

metabolism

The body cools itself by:

increasing blood flow to the skin

Moving a limb away from the median plane is called:

abduction

an ionic bond is formed by:

positive and negative ions combining

Peptide bonds join _____________ together.

amino acids

DNA:

 codes for the production of proteins

Proteins perform all the following functions:

form blood clots, maintain blood pH, and act as chemical messengers in the body

Protein function is the result of:

the shape of the protein

The formation of sucrose produces a molecule of water. This is an example of:

dehydration synthesis

An atom has the atomic number 20. What charge will it have as a free ion in solution?

+2

The oxygen and hydrogen in a water molecule are held together by:

covalent bonds

The charge on a proton is:

positive

A molecule that binds to the active site of an enzyme is called:

the substrate

glucose can be stored in the muscle as

glycogen

The connective tissue sheath that envelops fascicles or bundles of muscle fibers is the:

perimysium

The first event or starting point of muscle relaxation is

calcium is actively pumped in the sarcoplasmic reticulum

The lightest part of the striations in skeletal muscle is composed of

actin filaments

The molecule covering the active sites on the actin in muscle myofilaments is

tropomyosin