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MDCAT Test Online Preparation (Test-06)

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Posted By: cluesbook

Posted On: September 8, 2021

MDCAT Test Online Preparation
MDCAT Test Online Preparation

1.Homologous structures represent.

  1. Artificial selection
  2. Parallel evolution
  3. Common ancestor✅
  4. All of The Above
2.Decent with modification show:
  1. All animals resemble✅
  2. All animals do not resemble
  3. All animals resemble but later on change
  4. None
3.In two polypeptide chain which structure present:
  1. Primary
  2. Secondary
  3. Tertiary
  4. All four structures ✅
4.pH of salivary amylase .
  1. 5.6
  2. 6.8✅
  3. 7.6
  4. 8.6

Feedback:

In fact, it is swallowed with chewed food and subsequently inactivated by extremely low gastric pH; amylase in fact has an optimal pH around 7, and the pH of saliva is generally between 6.4 and 7.0. α-Amylase is produced by salivary glands and mainly from exocrine pancreas.

5.Jointed legs in insect.
  1. Many joints✅
  2. No joints
  3. Exoskeleton is flexible to move body at joint
6.Porphyrin ring has how many Pyrrole rings
  1. 1
  2. 2
  3. 3
  4. 4
Feedback:
Structurally, porphyrin consists of four pyrrole rings (five-membered closed structures containing one nitrogen and four carbon atoms) linked to each other by methine groups (―CH=). The iron atom is kept in the centre of the porphyrin ring by interaction with the four nitrogen atoms.
7.Homozygous means
  1. Similar Alleles✅
  2. Different alleles
8.Which structure in virus has lysozyme .
  1. Tail✅
  2. Nucleocapsid
  3. Capsid
  4. Spike
9.Which is the most virulent phase of HIV
  1. HIV-1
  2. HIV-2✅
  3. HIV-A1
  4. HIV-A2
Feedback:
One of the obstacles to treatment of the human immunodeficiency virus (HIV) is its high genetic variability.[1] HIV can be divided into two major types, HIV type 1 (HIV-1) and HIV type 2 (HIV-2). HIV-1 is related to viruses found in chimpanzees and gorillas living in western Africa, while HIV-2 viruses are related to viruses found in the sooty mangabey, a vulnerable West African primate.[2] HIV-1 viruses may be further divided into groups. The HIV-1 group M viruses predominate and are responsible for the AIDS pandemic. Group M can be further subdivided into subtypes based on genetic sequence data. Some of the subtypes are known to be more virulent or are resistant to different medications. Likewise, HIV-2 viruses are thought to be less virulent and transmissible than HIV-1 M group viruses, although HIV-2 is also known to cause AIDS.
10. C= Ç1 +C2+ C3 occur in
  1. Parallel ✅
  2. Series’




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