MDCAT Biology Solved MCQs Unit 3 With Answer Keys

MDCAT Biology Solved MCQs: In the past, MCQs have had more than one right answer. If the question is a multiple-choice question, you should answer all of the questions. This will save you time and help you make sure you didn’t miss anything important when answering questions on paper.

But if there aren’t multiple answers, the pattern from last year suggests that only one mark should be given if all of the choices are right. Otherwise, no marks should be given, and candidates should keep trying to answer those questions until they get full marks. Questions that use words like “always” or “never” are tricky and don’t guarantee that a certain number of answers are right.

MDCAT Biology Solved MCQs For Entry Test

MDCAT Biology MCQs from past papers of entry test. All MDCAT Biology MCQs are chapter-wise with answer keys. Here are some examples of biology test questions. Try to solve them, and do the best you can! If you get stuck, skip ahead and look below each question to see how I explain each answer choice.

You should be able to see where your problems are and what ideas and details you can get rid of because they are too obvious. Remember that on a real test, you can’t tell which information is most important, so you have to try everything. As an example,

1) The optimum temperature for enzymes in the human body is: (Entry Test 2009)
a) 32 °F
b) 313 °K
c) 46°C
d) 37 °C
2) Biochemically enzymes are: (Entrance Self-Test-2011)
a) Carbohydrates
b) Hormones
c) Fatty acids
d) Proteins
3) The presence of enzymes 🙁 Entrance Self-Test-2011)
a) Slows down the rate of reaction
b) Increases the rate of reaction
c) Does not show any change
d) Completely stops the reaction
4) Lock and Key Model of enzyme reacting with the substrate was originally proposed by: (Entrance Self-Test-2011)
a) Emil Fisher
b) Robert Hook
c) Koshland
d) Robert Brown

MCQs Of 11th Biology For MDCAT 2021-22:

5) Optimum pH for pepsin to work efficiently is: (Entrance Self-Test-2011)
a) 4.50
b) 6.80
c) 2.00
d) 9.00
6) The type of inhibition in which the inhibitor has no structural similarity to the substrate and combines
with the enzyme other than the active site is called: (Entry Test-2012)
a) Irreversible inhibition
b) Competitive inhibition
c) Non-competitive and reversible inhibition
d) Reversible inhibition
7) The inhibitors that bind tightly and permanently to enzymes and destroy their globular structure stopping their catalytic activity are: (Entry Test 2012)
a) Reversible inhibitors
b) Competitive inhibitors
c) Irreversible inhibitors
d) Non-competitive inhibitors
8) If the detachable co-factor is an inorganic ion then it is (Entry Test-2012)
a) Coenzyme
b) Holoenzyme
c) Holoenzyme
d) Activator
9) Optimum pH value for the working of pancreatic lipase is: (Entrance Test-2013, 14)
a) 4.50
b) 2.00
c) 7.60
d) 9.00
10) All coenzymes are derived from (Entrance Test-2013, 14)
a) Proteins
b) Carbohydrate
c) Nucleic acids
d) Vitamins
11) The view that the active site of an enzyme is flexible and when a substrate combines with it, causes changes in enzyme structure is known as (Entrance Test-2013, 16)
a) Lock and key model
b) Sliding filament model
c) Induce fit model
d) Specificity model
12) The competitive inhibitors have structural similarity with (Entrance Test-2014)
a) Active site
b) Binding site
c) Substrate
d) Co-enzyme

Biology Unit 3 Solved MCQs For Entry Test:

13) Which one of the following is an example of a competitive inhibitor? (Entrance Test-2015)
a) Glucose
b) Succinic acid
c) Fumarate
d) Malonate
14) Some enzymes require a helper which is a non-protein part for its efficient functioning is called:
(Entrance Test-2015)
a) Accelerator
b) Prosthetic group
c) Cofactor
d) Apoenzyme
15) An enzyme required Mg++ to catalyze the substrate. The Mg++ is best identified as:
(Entrance Test-2016)
a) Prosthetic group
b) Co-enzyme
c) Activator
d) Inhibitor
16) All enzymes are
a) Fibrous proteins
b) Low molecular weight proteins
c) Lipoproteins
d) Globular proteins
17) The reactants on which enzyme works are: (Entry Test-2017)
a) Products
b) Substrates
c) Metabolites
d) Catbolites
18) W.O.F comprises inorganic ions: (Entry Test-2017)
a) Coenzymes
b) Activators
c) Apoenzyme
d) Prosthetic group

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