WorksheetsPBS
Total questions: 15
Worksheet time: 15mins
Adenine bonds with ______________.
Guanine
Thymine
Cytosine
Adenine
Guanine bonds with ______________.
Adenine
Guanine
Cytosine
Thymine
Which 2 molecules form the sides (backbone) of the DNA ladder?
deoxyribose sugar and adenine
deoxyribose sugar and a hydrogen bond
deoxyribose sugar and the nucleus
deoxyribose sugar and phosphate
Which part of the nucleotide is labeled 2?
nitrogen base
phosphate
deoxyribose
Which part of the nucleotide is labeled 3?
deoxyribose
nitrogen base
phosphate
Which of the following is the most common presumptive blood test that uses phenolphthalein which reacts with hemoglobin?
Luminol
Leucocrystal Violet
Kastle-Meyer
Based on these results whose blood was found in the blood stain at the crime scene?
Bob
Sue
John
Lisa
The force of blood on the vessels during contraction and relaxation of the heart.
Heart Rate
Skin Conductivity
Blood Pressure
Respiration Rate
A soap manufacturer wants to prove that their detergent works better to remove tough stains. What is the dependent variable?
Amount of detergent
Type of detergent
Stain removal
Length of time washing
The amount of breaths someone takes per min
Heart Rate
Skin Conductivity
Respiration Rate
Blood Pressure
The amount of times the heart beats per min
Heart Rate
Skin Conductivity
Blood Pressure
Respiration Rate
If someone is In fight or flight, when heart rate increases, respiratory rate...
Decreases
Increases
Stays the same
PBS is commonly used in laboratories as a buffer solution. What does PBS stand for?
Phosphate Buffered Saline
Potassium Buffered Solution
Phosphorus Buffer System
Protein Binding Solution
Which of the following is a primary use of PBS in biological experiments?
To stain cells
To fix tissues
To maintain pH balance
To increase cell growth
PBS is often used in cell culture. What is the main reason for using PBS in washing cells?
To provide nutrients
To remove excess proteins
To maintain osmotic balance
To increase cell adhesion
