Bissoy.com
Doctors Medicines MCQs Q&A

The acrosome and cortical reactions that occur immediately after fertilization ensure which of the following?

The acrosome and cortical reactions that occur immediately after fertilization ensure which of the following? Correct Answer One and only one sperm will fertilize the egg.

(C) The acrosome reaction enables the sperm to penetrate the coat surrounding the ovum. The cortical reaction ensures that a fertilization membrane forms and prevents another sperm from penetrating the egg. The cortical reaction is responsible for a slow block to polyspermy.

Related Questions

Seven people A, B, C, D, E, F and G live on separate floors of a 7-floor building. Ground floor is numbered 1, first floor is numbered. 2 and so on until the topmost floor is numbered 7. Each one of these having a different cars-Cadillac, Ambassador, Fiat, Maruti, Mercedes, Bedford and Fargo but not necessarily in the same order. Only three people live above the floor on which A lives. Only one person lives between A and the one having a car Cadillac. F lives immediately below the one having a car Bedford. The one having a car Bedford lives on an even-numbered floor. Only three people live between the ones having a car Cadillac and Maruti. E lives immediately above C. E is not having a car Maruti. Only two people live between B and the one having a car Fargo. The one having a car Fargo lives below the floor on which B lives. The one having a car Fiat does not live immediately above D or immediately below B. D does not live immediately above or immediately below A. G does not have a car Ambassador. Question : How many people live between the floors on which D and the one having a car Bedford ?
In the question below, are given a statement followed by three courses of actions numbered I, II and III. On the basis of the information given, you have to assume everything in the statement to be true, and then decide which of the suggested course of action logically follow (s) for pursuing. Statement: The India Risk Survey 2017 report ranks 'Information & Cyber Insecurity' as the biggest risk facing Indian companies. Indian organizations, both public and private, had witnessed over 27,000 incidents of security threat, from January 2017 till June 2017 alone. Phishing, scanning/probing, website intrusions and defacements, virus/malicious code, ransomware, Denial of Service attacks, and data breaches are some ways in which hackers attack business websites, which can cause operational disruptions and potentially steal sensitive information. Small and medium businesses (SMBs), unfortunately, have been seeing rising incidences of cybercrime. In fact, 70 percent of cyberattacks occur at organizations with lesser than 100 employees  Courses of action: I. Mandate basic security practices and policies for all employees, such as 2-factor authentication, internet use guidelines and create and enforce rules on handling and protecting sensitive data. Conduct frequent training to sensitize employees about opening suspicious emails, encrypting their data, using strong passwords on their devices, installing security apps, and limiting activity over public Wi-Fi. Implement and enforce incident reporting to help ensure that even the smallest breach is report to management as well as the IT teams. II. Basics still matter and are some of the best defenses against viruses, malware, and other online threats. Assess the assets that are most at risk - data, servers, network - and ensure that the systems are updated with the latest security software, web browser, and operating system. Implement firewall security and run antivirus software after each update.  III. Ensure regular backup of all critical data - whether stored in-house or on the cloud. Run scheduled attack drills and stress tests to identify vulnerabilities and ensure that data restoration and business continuity are executed as planned.
Each of the questions below consists of a question and three statements numbered I, II and III given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read all the three statements and give answer. There are six letters E, I, P, G, N and O is PIGEON the word formed after performing the following operations using these six letters only? I. O is placed fourth to the right of P. G is not placed immediately next to either P or O. II. N is placed immediately next (either left or right) to O. E is placed immediately next (either left or right) to G. III. Both I and E are placed immediately next to G. The word does not begin with N. P is not placed immediately next to E.
Six persons A, B, C, D, E and F were engaged in a group discussion. A spoke immediately before D but immediately after B. B spoke immediately after F. If C spoke immediately after D but before E, then who among the following started the discussion?
Directions: Seven different boxes A, B, C, D, E, F and G of different colours viz., Orange, Pink, Purple, Yellow, Blue, Red and Green are arranged one above the other. The box at the bottom of arrangement is numbered 1, the above box is numbered 2 and so on. B is immediately above E. More than two boxes are above the Orange box. The Yellow box is immediately below A. Only one box is between the Orange box and F. G is immediately above the Red box. Only one box is between B and the Pink box. Only two boxes are between the Pink and the Green box. Only two boxes are between the Yellow box and the Orange box. The Purple box is neither at the top nor at the bottom of the arrangement.B is above Pink box. C is immediately above F. Neither C nor G is a Yellow box. G is not a Orange box. Question: Which combination represents the position of C and its colour?
How many ‘3’ are there in the following sequence which is either immediately preceded by ‘2’ and immediately followed by ‘4’ or immediately preceded by ‘5’ and immediately followed by ‘2’? 2 3 4 5 4 3 2 4 3 3 2 4 4 5 2 2 3 4 5 3 2 3 4 3 5 4 2 2 3 4 4 5 3
Five friends, Riyaz, Akaram, Puneet, Charlie, and Mithun, are sitting around a circular table, not necessarily in that order. Riyaz is sitting immediately next to Akram but not sitting immediately next to Puneet. Akram is not sitting immediately next to Charlie. Mithun is sitting to Riyaz’s immediately right. Puneet is sitting to Akram’s immediate left. Charlie is sitting between Puneet and Mithun. Between which two friends is Riyaz stitting?
What are the objectives of the verification of assets? (i) to ensure the existence of an asset (ii) to ensure the ownership (iii) to ensure the possession (iv) to ensure the lien
What are the objectives of verification of liabilities? (i) to ensure the existence of a Liability (ii) to ensure the ownership (iii) to ensure proper valuation (iv) to ensure the obligation
Punit, Qumar, Rohit, Sheetal, Tabir, and Umesh live in a multi-storeyed building. Qumar lives immediately below the floor where Umesh lives. Sheetal lives immediately below the floor where Qumar lives. Tabir lives on one of the floors below the floors where Qumar and Sheetal live but he lives on one of the floor above the floor where Punit lives. Tabir lives immediately below the floor where Rohit lives. Rohit lives immediately below the floor where Sheetal lives. Who lives on the top floor?