Question

QUESTION 40

1. Movement of molecules across plasma membranes like the exchange of oxygen from blood will most likely use a method of transport called (hint: no energy required)

   	A.	active transport
   	B.	sodium-potassium pumps
   	C.	diffusion
   	D.	ATP-transport mechanism
   	E.	endocytosis

1.5 points   

QUESTION 41

1. Muscle cells require more energy than most other cells in order to function. Therefore, muscle cells would be expected to have more ________ than most other cells. (Think: which organelle is responsible for energy production!!)

   	A.	ribosomes
   	B.	nuclei
   	C.	mitochondria
   	D.	peroxisomes
   	E.	triglycerides

QUESTION 53

1. The end result of Complement Proteins is (what happens to the bacteria)

   	A.	to phagocytize the cell
   	B.	make the foreign cell stronger
   	C.	lysis of the foreign cell
   	D.	antibodies mark the cell

1.5 points   

QUESTION 54

1. The following are the steps to antibody mediated immune response in B-cells. Which answer shows the correct order of steps?
   
   D) Mature, uncommitted B cell binds antigen by specific receptor
   
   C) B cell is activated and creates clones of cells
   
   B) Memory cells store information for future exposure to same antigen
   
   A) produces Plasma cells for production of antibody

   		B,C,A,D
   		D,C,B,A
   		A,B,C,D
   		C,B,D,A

1.5 points   

QUESTION 55

1. The kidneys function to maintain homeostasis in all of the following ways EXCEPT which one?

   	A.	controlling salt balance in body fluids
   	B.	exchanging blood gases like O2 & CO2
   	C.	regulating vitamin D
   	D.	regulating blood volume
   	E.	regulating blood pressure

1.5 points   

QUESTION 56

1. The motor division of the peripheral nervous system sends information to all of the following  EXCEPT which one? (think of the direction of the impulses (ie: to the brain, away from the brain?)

   	A.	somatic division
   	B.	sensory division
   	C.	sympathetic division
   	D.	autonomic division
   	E.	parasympathetic division

1.5 points   

QUESTION 57

1. The offspring resulting from a cross between a creme colored horse (PP) and a chestnut-colored horse (CC) is of an intermediate color (PC, Palomino, between white and chestnut) in other words when a third phenotype is possible (a true blended trait). Which one of the following patterns of inheritance best explains this?

   	A.	codominance
   	B.	complete dominance
   	C.	sex-linked
   	D.	polygenic inheritance
   	E.	incomplete dominance

1.5 points   

QUESTION 58

1. The primary structure of proteins involves

   	A.	the amino acid sequence
   	B.	alpha helices & beta pleated sheets
   	C.	larger scale twists & turns of a polypeptide chain
   	D.	2 or more polypeptide chains bonded together

1.5 points   

QUESTION 59

1. The process by which the DNA code is converted from a single gene into a strand of mRNA is called (THINK: DNA to RNA to Protein

   	A.	reproduction
   	B.	replication
   	C.	transcription
   	D.	translation
   	E.	metabolism

1.5 points   

QUESTION 60

1. The process by which undigested or waste material is removed from the gastrointestinal tract is

   	A.	elimination
   	B.	secretion
   	C.	urination
   	D.	mechanical processing
   	E.	absorption

1.5 points   

QUESTION 61

1. The products (a whole bunch at once) of the endoplasmic reticulum are transported to the Golgi apparatus by an organelle called: (it's not the same question that you may have seen previously)

   	A.	free-floating ribosomes
   	B.	cilia
   	C.	gated channels
   	D.	endocytosis
   	E.	vesicles

Answer 1

Question 40

The movement of oxygen from the alveoli that is the lung surface to the blood takes place by simple diffesion process. There is no involvent of against the gradient transport and no ATP utilization. Therefore, active transport and ATP-transport mechanism is not used. Sodium potasium pump is used in nerve impulse transmission and endocytocic takes place in living cell bt invagination of membrane. Both of these are not used in gases transport. Hence, option c is correct.

Question 41

Muscle cell require more energy thus, mitochondria is more in number in muscle muscle cell. Mitochondria is the power house of the cell and involved in energy production. Ribosomes are involved in protein synthesis. Nucleus has the genetic material of a cell. Peroxisomes are involved in breakdown of fatty acid. Triglycerides are a type of biomolecule. Hence, option c is correct.

Question 53

Complement system has a set of plasma proteins that are acticated by antigen presence or antigen-antibody interaction and causes a series of reaction leading to the lysis of the antigen. Phagocytosis or engulfying of the living cell or antigen is done by macrophages and neutrophils. Complement system has nothing to do with antibody and making foreign cell stronger. Hence, option c is correct.

Question 54

Steps involved in the antibody mediated immune response -

Step 1 - B cell activation and binding of antigen with receptors of B cells.

Step 2 - Multiplication of this activated B cells.

Step 3 - Differentiaton of memory and plasma cells to keep a memory of the antigen attack.

Step 4 - Antibody production.

Hence, option 2 with DCBA is correct.

Question 55

Kidney maintains the homeostasis of the body by maintaing the water and salt balance which keep the blood volume in track. And normal blood volume helps is regulating the blood pressure. Kidney also helps in maintaing the minerals and vitamins level normal in the body. Lungs are involved in gaseous exchange. Hence, option b is correct.

Question 56

Motor division of the peripheral nervous system send the nerve stimulus away from the CNS (brain and spinal cord). Somatic system is involved in the voluntary control of the body movements in which impulses are send to the muscles for the movement. Autonomic division supplies the various internal organs of the body and it has two division sympathetic and parasympathetic which send impulses for the functioning of the organs. But nervous system involves the 5 sense organs of the body that collects the information from the outside world and supply it to the brain without any motor response. Hence, option b is correct.

Question 57

In incomplete domonance is observed that the heterozygous individuals (PC) has a intermediate phenotype between the dominant and recessive whic is seen in this palomino color. In co-dominance there is equally expression of both the phenotype, there is no intermediate case. In polygenic inheritance there is one character which is controlled by more than one gene. The case is not sex linked because there is no involvement of the X and Y chromosomes. In complete dominance also there is no intermediate phenotype. Hence, option e is correct.

Question 58

Primary structure of a protein reveals the sequence of amino acids only. Secondary structure involve alpha helics & beta pleated sheets. Tertiary structure has folding twists and turns of the polypeptide chain due to bonding in between the amino acid of the chain. Quternary structure involves more than one polypeptide chain. Hence, option a is correct.

Question 59

Transcription is the process of production of mRNA from DNA. Reproduction is production of offspring. Replication is the process of replicating DNA. Trnslation is the production of protein from mRNA. Metabolism is the living process of an organism. Hence, option c is correct.

Question 60

Removal of waste products of digestion takes place through elimination or excretion. Urination is the removal of urine. Secretion is the process of secreting material from living cells. Mechanical processing is the process of crushing and grinding of material. Absorption is simply absorbing material from external environment. Hence, option a is correct.

Question 61

Vesicles carry the products released from endoplasmic reticulum to the golgi apparatus for further processing. Endocytosis and ribosomes are same as I have discussed earlier. Cilia are the extra-cellular structure not present inside the cell. Gated channels transport in and out of the cell not of the cell organelles. Hence option e is correct.