Biology Lab Midterm

Question 1

what is the basic unit of mass?

Answer 1

Grams

Question 2

what is the basic unit of volume?

Answer 2

meter

Question 3

how many kilograms are in a pound?

Answer 3

2.2

Question 4

what is the basic unit of length?

Answer 4

meter

Question 5

what is the basic unit of a chemical substance?

Answer 5

moles

Question 6

what is avogrados number?

Answer 6

6.022x10^23

Question 7

what you should never do when using a lab balance?

Answer 7

place the samples directly on the balance

Question 8

what does the TARE button do?

Answer 8

puts the balance back to zero

Question 9

when is the only time you will push the plunger down the second time?

Answer 9

when all the liquid is release

Question 10

what objective lens should you always start with on the light microscope?

Answer 10

on the smallest which is the 4x

Answer 11

ocular lense, revolving nose, stage, arm, coarse adjustment, fine coarse adjustment

Question 12

what are four macromolecules of life?

Answer 12

carbohydrates, lipids, protein and nucleic acid

Question 13

macromolecules are - that are built from -

Answer 13

monomers, polymer

Question 14

what are two functions of carbohydrates?

Answer 14

storage, energy use, and construction

Question 15

two function of lipids

?

Answer 15

cell membrane and energy storage

Question 16

two examples of protein and their function?

Answer 16

enzyme- speed up chemical reaction
casein- storage
actin/myosin- movement

Question 17

cytology

Answer 17

study of cell structure and function

Question 18

what is the defining characteristic eukaryotic membrane?

Answer 18

unit membrane

Question 19

what are the three bacteria shapes?

Answer 19

sphere (coccil), spiral, rod(bacilli)

Question 20

where those ecoli found?

Answer 20

they live in the digestive tract in the warm blooded animals.

Question 21

where are methanogens produce?

Answer 21

they live in the gut of animals

Question 22

what are the difference between plant cells and animal cells?

Answer 22

plants have chloroplast
plants have a cell wall
plants have a vacuole

Question 23

what process did we witness happening within the elodea leaf?

Answer 23

cytoplasmic streaming

Question 24

what are the three germ layers

?

Answer 24

ectoderm mesoderm and endoderm