prelim

Question 1

used to make objects appear larger

Answer 1

magnifying glass

Question 2

used for measuring and storing liqiuds

Answer 2

beaker

Question 3

used to measure the temperature of a liquid

Answer 3

thermometer

Question 4

it is a measuring instrument for determining the weight or mass of an object

Answer 4

balance scale

Question 5

used for growing microbiology cultures

Answer 5

petri-dish

Question 6

a thin glass plate used to cover samples mounted on a microscope slide

Answer 6

cover slip

Question 7

a device used to view objects which are too small to see or explore with your eye alone

Answer 7

microscope

Question 8

used to cut through skin and muscles and remove organs

Answer 8

scissors

Question 9

used to cut tissues

Answer 9

scalpel

Question 10

used to secure specimens to dissection tray

Answer 10

dissecting pin

Question 11

very precise glassware for measuring liquids

Answer 11

graduated cylinder

Question 12

used for measuring volatile liquids

Answer 12

erlenmeyer flask

Question 13

for holding small items and for holding skin/muscle etc. during dissections

Answer 13

forceps

Question 14

used to time experiments

Answer 14

timer

Question 15

eye peotection

Answer 15

goggles

Question 16

for liquids and microbiology cultures

Answer 16

test tubes

Question 17

used for measuring length and width of an object

Answer 17

centimeter ruler

Question 18

used to dispense liquids drop by drop or by the ml

Answer 18

pipet

Question 19

used for moving liquids from one container to another

Answer 19

funnel

Question 20

for securing test tubes

Answer 20

test tube rack

Question 21

what is the general shape of the onion cells?

Answer 21

rectangular shape

Question 22

describe what you saw without the stain

Answer 22

the cell is not totally visible

Question 23

is the onion skin composed of one cell or many cells?

Answer 23

many cells

Question 24

why is it easier to see the onion cells after they stained

Answer 24

because it gives stain to epidermal cell making it more visible

Question 25

all plant have cell walls. what is the function of the cell wall

Answer 25

for protection and growth

Question 26

does the egg feel hard or soft

Answer 26

it feels soft

Question 27

difference between this egg and a regular egg

Answer 27

yes, the regular egg has shell and the shell of the vinegar egg dissolve

Question 28

what do you think happened to the egg when it was covered with vinegar?

Answer 28

its shell reacted to the vinegar which makes the shell dissolve

Question 29

did you learn anything new from conducting the egg in vinegar experiment? explain?

Answer 29

yes, the acetic acid in the vinegar trigger the shell which has calcium carbonate makes the shell dissolve

Question 30

define protein denaturation

Answer 30

the destruction of tertiary structure

Question 31

what are the 3 parts of a nucleotide

Answer 31

deoxyribose, phosphate, organic base

Question 32

list the different kinds of nitrogen

Answer 32

Adenine
Thymine
Cytosine
Guanine

Question 33

is there always going to be an equal number of adenine and thymine nucleotides in molecule? why?

Answer 33

yes, due to hydrogen bond so apparently they are complimentary pair

Question 34

the sides of ladder are made up of alternating _____ and _______ molecules. The steps or rungs of the ladder are made up of ______ held together by hydrogen bond

Answer 34

deoxyribose
phosphate
nitrogen base

Question 35

DNA

Answer 35

deoxyribonucleic acid

Question 36

RNA

Answer 36

ribonucleic acid

Question 37

shape of DNA

Answer 37

double helix

Question 38

organic base paired to adenine

Answer 38

uracil

Question 39

how many strands make up DNA

Answer 39

two

Question 40

how many strands make up rna

Answer 40

one