Which of the following hormones is associated with contractions during childbirth?
Answer(s): D
Oxytocin is associated with contractions of the uterus during childbirth in a positive signal feedback mechanism. Be sure to understand all the common hormones of the hypothalamus, anterior and posterior pituitary, androgen and hormones associated with the digestive system.
An mRNA strand has the following sequence: 5' CUAUUG 3'. Identify the DNA coding strand:
Answer(s): C
The coding strand is the DNA strand that is not transcribed into mRNA. The coding strand is identical to the mRNA strand, except with T’s instead of U’s. The template strand (choice 5' CAATAG 3') is what gets transcribed into mRNA. Understand the difference between coding and template strands as well as base-pair rules.
Jellyfish possess what type of circulatory system?
Answer(s): E
Cnidarians (like the jellyfish) do not possess a circulatory system and use diffusion to circulate materials instead. It is vital to know the circulatory, reproductive, excretory, respiratory etc. systems of each phylum as you will be tested on it in the biology section!
An enzyme without a co-factor is called:
Answer(s): B
This is the definition of an apoenzyme. A holoenzyme is an apoenzyme plus the co-factor. Be aware of basic types of enzymes and their definitions.
Which of these classes is incorrectly matched with the animal?
All of the classes are indeed matched correctly to the animal.
Which of the following are not pyrimidines?
Uracil, Cytosine and Thymine are pyrimidines. Adenine and Guanine are purines.
Which of the following structure and function are linked incorrectly below?
All of the answer choices are all indeed correct.
What is the functional unit of the liver called?
Post your Comments and Discuss Test Prep OAT exam prep with other Community members:
Our website is free, but we have to fight against AI bots and content theft. We're sorry for the inconvenience caused by these security measures. You can access the rest of the OAT content, but please register or login to continue.