practice questions

Question 1

compounds that minimize pH changes in a solution are called?

Answer 1

Buffers

Question 2

____ substances dissolve in water whereas ____substances do not?

Answer 2

hydrophilic,hydrophobic

Question 3

The normal physiological pH of human blood is?

Answer 3

7.4

Question 4

which one of the following is not a monosaccharide?

Answer 4

lactose

Question 5

triglycerides are storage forms of?

Answer 5

lipids

Question 6

which of the following is not present in the cell plasma membrane?

Answer 6

nucleic acids

Question 7

DNA stands for?

Answer 7

deoxyribonucleic acid

Question 8

both DNA and RNA contain all of the following except?

Answer 8

amino acids

Question 9

extracellular fluid (ecf) is composed of plasma and ____?

Answer 9

intercellular fluid

Question 10

_____ is a process by which the internal body environment is maintained within relatively narrow limits (relatively constant and unchanging)

Answer 10

homeostasis

Question 11

successful coping of an organism with its environment is called?

Answer 11

aqdaptation

Question 12

_____ are sites of protein sysnthesis?

Answer 12

rough endoplasmic reticulum

Question 13

____ are sites of lipid synthesis?

Answer 13

smooth endoplasmic reticulum

Question 14

energy for functioning of biological cell is produced by?

Answer 14

mitochondria

Question 15

the process of ____ takes place in the _____?

Answer 15

transcription,nucleous

Question 16

the process of water moving from region of high to low water concentration is called?

Answer 16

active transport

Question 17

active transport is different from facilitated diffusion in that active transport requires:

Answer 17

ATP (exam question)

Question 18

if a normal cell is placed in hypertonic solution it?

Answer 18

shrinks

Question 19

in _____,the ion and the substance are transported across the membrane in opposite directions?

Answer 19

counter-transport

Question 20

pick the correct statement?

Answer 20

ECF contains more sodium ions compared to ICF

Question 21

active transport is similar to facilitated diffusion in that active transport also

Answer 21

requires a carrier protein

Question 22

Basement membrane of the cells is generally a thin layer made of _____lying under the epithelial tissue?

Answer 22

carbohydrate

Question 23

which one of the following cell components is not directly involved in the process of protein synthesis?

Answer 23

mitochondria

Question 24

pick the false statement?

Answer 24

opening of chloride channels in the plasma membrane of cells will lead to the departure of this ion from the cell

Question 25

an ion :

Answer 25

is formed when an atom loses electrons
is formed when an atom gains electrons
can be negatively or positively charged

Question 26

AB + CD —————- AC + BD

this a _______ reaction

Answer 26

exchange

Question 27

the sequence of 3 bases on the mRna molecule that codes for a specigic amino acid is called?

Answer 27

codon

Question 28

all enzymes are made of proteins? this statement is?

Answer 28

always true